pdumdv.owl
type: Ontology
IAO_0000700: Platynereis life cycle stage
default-namespace: platynereis_stage
has_obo_format_version: 1.2
comment: Modified from PD_ST by Thorsten Henrich

definition
type: AnnotationProperty

granular stage
type: AnnotationProperty
comment: Subset consisting of classes describing highly granular developmental stages (for instance, '23-year-old'). Such stages might be useful for annotation purpose, but might be folded into less granular parents for display purpose.
sub property of: subset_property

subset_property
type: AnnotationProperty

database_cross_reference
type: AnnotationProperty

has_exact_synonym
type: AnnotationProperty

has_narrow_synonym
type: AnnotationProperty

has_obo_format_version
type: AnnotationProperty

has_obo_namespace
type: AnnotationProperty

has_related_synonym
type: AnnotationProperty

shorthand
type: AnnotationProperty

part of
type: ObjectProperty
type: TransitiveProperty
database_cross_reference: BFO:0000050
has_obo_namespace: platynereis_stage
id: part_of
shorthand: part_of

preceded_by
type: ObjectProperty
type: TransitiveProperty
definition: X preceded_by Y iff: end(Y) before_or_simultaneous_with start(X)
database_cross_reference: BFO:0000062
has_obo_namespace: platynereis_stage
id: preceded_by
shorthand: preceded_by

immediately_preceded_by
type: ObjectProperty
sub property of: preceded_by
definition: X immediately_preceded_by Y iff: end(X) simultaneous_with start(Y)
database_cross_reference: RO:0002087
has_obo_namespace: platynereis_stage
id: immediately_preceded_by
shorthand: immediately_preceded_by

Platynereis life cycle stage
type: Class
definition: A Platynereis developmental stage is an occurrent that is a temporal subdivision of a Platynereis dumerilii development.
database_cross_reference: UBERON:0000105
has_exact_synonym: developmental stage
has_narrow_synonym: stage
has_obo_namespace: platynereis_stage
id: PdumDv:0000090
comment: Developmental stages are typically demarcated by the timing of appearance, loss or transformation of specific anatomical structures.

Axiom
annotated source: Platynereis life cycle stage
annotated property: definition
annotated target: A Platynereis developmental stage is an occurrent that is a temporal subdivision of a Platynereis dumerilii development.
database_cross_reference: PLATY:T_Henrich

zygote stage
type: Class
subclass of: Platynereis life cycle stage
definition: First developmental stage with the following key events: Fertilized egg before the onset of cleavage. Jelly forms, cortical migration of lipid droplets.
database_cross_reference: UBERON:0000106
has_obo_namespace: platynereis_stage
has_related_synonym: 0-2 zyg
id: PdumDv:0000100
comment: At a temperature of 18 C this stages lasts from 0.00 hours till 2.00 hours.

Axiom
annotated source: zygote stage
annotated property: definition
annotated target: First developmental stage with the following key events: Fertilized egg before the onset of cleavage. Jelly forms, cortical migration of lipid droplets.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: zygote stage
annotated property: has_related_synonym
annotated target: 0-2 zyg
database_cross_reference: PLATY:A.H.L.Fischer

cleaving embryo stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: zygote stage
definition: Developmental stage following Zygote stage with the following key events: Spiral cleavage pattern with individually identifiable blastomeres. First and second cleavage inequal and meridional. Third cleavage forms micromeres and macromeres. Ends with the appearance of the fourth quartette of micromeres.
database_cross_reference: UBERON:0000107
has_obo_namespace: platynereis_stage
has_related_synonym: 2-7 cle
id: PdumDv:0000200
comment: At a temperature of 18 C this stages lasts from 2.00 hours till 7.00 hours.

Axiom
annotated source: cleaving embryo stage
annotated property: definition
annotated target: Developmental stage following Zygote stage with the following key events: Spiral cleavage pattern with individually identifiable blastomeres. First and second cleavage inequal and meridional. Third cleavage forms micromeres and macromeres. Ends with the appearance of the fourth quartette of micromeres.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: cleaving embryo stage
annotated property: has_related_synonym
annotated target: 2-7 cle
database_cross_reference: PLATY:A.H.L.Fischer

stereoblastula - stereogastrula stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: cleaving embryo stage
definition: Developmental stage following Cleaving embryo stage with the following key events: Spherical mass of dividing blastomeres whose cell lineage can no longer be followed by eye. Micromeres divide bilaterally. Epibody starts.
has_obo_namespace: platynereis_stage
has_related_synonym: 7-13 ste
id: PdumDv:0000300
comment: At a temperature of 18 C this stages lasts from 7.00 hours till 13.00 hours.

Axiom
annotated source: stereoblastula - stereogastrula stage
annotated property: definition
annotated target: Developmental stage following Cleaving embryo stage with the following key events: Spherical mass of dividing blastomeres whose cell lineage can no longer be followed by eye. Micromeres divide bilaterally. Epibody starts.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: stereoblastula - stereogastrula stage
annotated property: has_related_synonym
annotated target: 7-13 ste
database_cross_reference: PLATY:A.H.L.Fischer

protrochophore stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: stereoblastula - stereogastrula stage
definition: Developmental stage following Stereoblastula - Stereogastrula stage with the following key events: Pre-larva, slowly rotating in the jelly driven by the multi-ciliated equatorial prototroch cells. Apical tuft appears.
has_obo_namespace: platynereis_stage
has_related_synonym: 13-24 pt
id: PdumDv:0000400
comment: At a temperature of 18 C this stages lasts from 13.00 hours till 24.00 hours.

Axiom
annotated source: protrochophore stage
annotated property: definition
annotated target: Developmental stage following Stereoblastula - Stereogastrula stage with the following key events: Pre-larva, slowly rotating in the jelly driven by the multi-ciliated equatorial prototroch cells. Apical tuft appears.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: protrochophore stage
annotated property: has_related_synonym
annotated target: 13-24 pt
database_cross_reference: PLATY:A.H.L.Fischer

early trochophore stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: protrochophore stage
definition: Developmental stage following Protrochophore stage with the following key events: Hatching larvae actively swimming in the water column, but yet without phototaxis. First pigment appears in the larval eyes. Telotroch forms apical ganglion forms. One serotonergic cell in the brain. First larval brain axon. Prototroch nerve develops. Ventral nerve cord is v-shaped.
has_obo_namespace: platynereis_stage
has_related_synonym: 24-26 et
id: PdumDv:0000500
comment: At a temperature of 18 C this stages lasts from 24.00 hours till 26.00 hours.

Axiom
annotated source: early trochophore stage
annotated property: definition
annotated target: Developmental stage following Protrochophore stage with the following key events: Hatching larvae actively swimming in the water column, but yet without phototaxis. First pigment appears in the larval eyes. Telotroch forms apical ganglion forms. One serotonergic cell in the brain. First larval brain axon. Prototroch nerve develops. Ventral nerve cord is v-shaped.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: early trochophore stage
annotated property: has_related_synonym
annotated target: 24-26 et
database_cross_reference: PLATY:A.H.L.Fischer

mid trochophore stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: early trochophore stage
definition: Developmental stage following Early trochophore stage with the following key events: Free-swimming trochophores showing phototaxis. Increasing amount of shading pigment in the larval eyes. Stomodeal rosette starts forming and moves anteriorly. The body shape starts to change from spherical to conical. Variable: red pigment spots around the prototroch cells. Second cerebral commissure, future nuchal organ nerve and asymmetric axon develop. Three more serotonergic cells around apical ganglion. First commissure in the ventral nerve cord. Dorsal and ventral longitudinal muscles appear.
has_obo_namespace: platynereis_stage
has_related_synonym: 26-40 mt
id: PdumDv:0000600
comment: At a temperature of 18 C this stages lasts from 26.00 hours till 40.00 hours.

Axiom
annotated source: mid trochophore stage
annotated property: definition
annotated target: Developmental stage following Early trochophore stage with the following key events: Free-swimming trochophores showing phototaxis. Increasing amount of shading pigment in the larval eyes. Stomodeal rosette starts forming and moves anteriorly. The body shape starts to change from spherical to conical. Variable: red pigment spots around the prototroch cells. Second cerebral commissure, future nuchal organ nerve and asymmetric axon develop. Three more serotonergic cells around apical ganglion. First commissure in the ventral nerve cord. Dorsal and ventral longitudinal muscles appear.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: mid trochophore stage
annotated property: has_related_synonym
annotated target: 26-40 mt
database_cross_reference: PLATY:A.H.L.Fischer

late trochophore stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: mid trochophore stage
definition: Developmental stage following Mid-trochophore stage with the following key events: Distinct stomodeal opening surrounded by stomodeal rosette, first chaetae visible within the trunk. Three larval segments appear simultaneously, identifiable by the developing chaetae in the trunk. Macromeres narrower towards the posterior. Second commissure forms in the ventral nerve cord. Dorsal and ventral longitudinal muscles elongate.
has_obo_namespace: platynereis_stage
has_related_synonym: 40-48 lt
id: PdumDv:0000700
comment: At a temperature of 18 C this stages lasts from 40.00 hours till 48.00 hours.

Axiom
annotated source: late trochophore stage
annotated property: definition
annotated target: Developmental stage following Mid-trochophore stage with the following key events: Distinct stomodeal opening surrounded by stomodeal rosette, first chaetae visible within the trunk. Three larval segments appear simultaneously, identifiable by the developing chaetae in the trunk. Macromeres narrower towards the posterior. Second commissure forms in the ventral nerve cord. Dorsal and ventral longitudinal muscles elongate.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: late trochophore stage
annotated property: has_related_synonym
annotated target: 40-48 lt
database_cross_reference: PLATY:A.H.L.Fischer

early metatrochophore stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: late trochophore stage
definition: Developmental stage following Late trochophore stage with the following key events: Formation of the first paratroch at the posterior border of the second chaetigerous segment, chaetae reach the body wall. Number of cells contributing to the stomodeal rosette is slowly increasing. Red pigment at the telotroch can appear. Third commissure forms in the ventral nerve cord. Second and third pair of serotonergic cells in the ventral nerve cord. Oblique and parapodial muscles more numerous and elongate.
has_obo_namespace: platynereis_stage
has_related_synonym: 48-51 emt
id: PdumDv:0000800
comment: At a temperature of 18 C this stages lasts from 48.00 hours till 51.00 hours.

Axiom
annotated source: early metatrochophore stage
annotated property: definition
annotated target: Developmental stage following Late trochophore stage with the following key events: Formation of the first paratroch at the posterior border of the second chaetigerous segment, chaetae reach the body wall. Number of cells contributing to the stomodeal rosette is slowly increasing. Red pigment at the telotroch can appear. Third commissure forms in the ventral nerve cord. Second and third pair of serotonergic cells in the ventral nerve cord. Oblique and parapodial muscles more numerous and elongate.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: early metatrochophore stage
annotated property: has_related_synonym
annotated target: 48-51 emt
database_cross_reference: PLATY:A.H.L.Fischer

mid metatrochophore stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: early metatrochophore stage
definition: Developmental stage following Early metatrochophore stage with the following key events: Pigment of the adult eyes clearly visible lateral-dorsally in the episphere. Chaetae outside the body wall, but parapodia not yet formed. Amount of pigment in the adult eyes increases. Chaetae elongate. The gut anlage becomes visible. Additional ring of cells surrounds the stomodeal opening from anterior to posterior. Stomodeum starts to invaginate into the head. Second paratroch forms at the posterior border of the first chaetigerous trunk segments. Increasing number of axons in the commissures. Convergent extension movements start in the ventral neuroectoderm and continue until 72hpf (Steinmetz et al., 2007). Fourth pair of serotonergic cells in the ventral nerve cord. Ventral medial longitudinal muscle starts forming.
has_obo_namespace: platynereis_stage
has_related_synonym: 51-60 mmt
id: PdumDv:0000900
comment: At a temperature of 18 C this stages lasts from 51.00 hours till 60.00 hours.

Axiom
annotated source: mid metatrochophore stage
annotated property: definition
annotated target: Developmental stage following Early metatrochophore stage with the following key events: Pigment of the adult eyes clearly visible lateral-dorsally in the episphere. Chaetae outside the body wall, but parapodia not yet formed. Amount of pigment in the adult eyes increases. Chaetae elongate. The gut anlage becomes visible. Additional ring of cells surrounds the stomodeal opening from anterior to posterior. Stomodeum starts to invaginate into the head. Second paratroch forms at the posterior border of the first chaetigerous trunk segments. Increasing number of axons in the commissures. Convergent extension movements start in the ventral neuroectoderm and continue until 72hpf (Steinmetz et al., 2007). Fourth pair of serotonergic cells in the ventral nerve cord. Ventral medial longitudinal muscle starts forming.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: mid metatrochophore stage
annotated property: has_related_synonym
annotated target: 51-60 mmt
database_cross_reference: PLATY:A.H.L.Fischer

late metatrochophore stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: mid metatrochophore stage
definition: Developmental stage following Mid-metatrochophore stage with the following key events: Parapodia visible but cannot move yet. Chaetae of the third chaetigerous segment reach to the posterior end of the larvae. Body shape changes from conical to torpedo-like and slender. Formation of the akrotroch starts. Stomodeal opening becomes slit-like. Ventral medial longitudinal muscle elongates.
has_obo_namespace: platynereis_stage
has_related_synonym: 60-66 lmt
id: PdumDv:0001000
comment: At a temperature of 18 C this stages lasts from 60.00 hours till 66.00 hours.

Axiom
annotated source: late metatrochophore stage
annotated property: definition
annotated target: Developmental stage following Mid-metatrochophore stage with the following key events: Parapodia visible but cannot move yet. Chaetae of the third chaetigerous segment reach to the posterior end of the larvae. Body shape changes from conical to torpedo-like and slender. Formation of the akrotroch starts. Stomodeal opening becomes slit-like. Ventral medial longitudinal muscle elongates.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: late metatrochophore stage
annotated property: has_related_synonym
annotated target: 60-66 lmt
database_cross_reference: PLATY:A.H.L.Fischer

early nectochaete stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: late metatrochophore stage
definition: Developmental stage following Late metatrochophore stage with the following key events: Parapodia start moving independently. Formation of the metatroch. Akrotroch fully developed. Rapid elongation of the trunk. Antennae not visible yet. Anlage of the proctodeum becomes visible. Occasionally larvae crawl using their parapodia. Much stronger pigmentation in the adult eyes. Lipid droplets move posteriorly. 1-2 pigmented spots at the basis of each parapodium. Dorsal and ventral roots of the circumesophageal connectives approach each other. Further serotonergic cells in the ventral nerve cord. Muscles form anteriorly to the stomodeum.
has_obo_namespace: platynereis_stage
has_related_synonym: 66-75 en
id: PdumDv:0001100
comment: At a temperature of 18 C this stages lasts from 66.00 hours till 75.00 hours.

Axiom
annotated source: early nectochaete stage
annotated property: definition
annotated target: Developmental stage following Late metatrochophore stage with the following key events: Parapodia start moving independently. Formation of the metatroch. Akrotroch fully developed. Rapid elongation of the trunk. Antennae not visible yet. Anlage of the proctodeum becomes visible. Occasionally larvae crawl using their parapodia. Much stronger pigmentation in the adult eyes. Lipid droplets move posteriorly. 1-2 pigmented spots at the basis of each parapodium. Dorsal and ventral roots of the circumesophageal connectives approach each other. Further serotonergic cells in the ventral nerve cord. Muscles form anteriorly to the stomodeum.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: early nectochaete stage
annotated property: has_related_synonym
annotated target: 66-75 en
database_cross_reference: PLATY:A.H.L.Fischer

mid nectochaete stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: early nectochaete stage
definition: Developmental stage following Early nectochaete stage with the following key events: Formation of the antero-dorsal pair of tentacular cirri, anal cirri and antennal stubs. Body shape changes from torpedo-like into worm-like. Head distinguishable from the trunk due to a constriction. Adult eyes grow in size and are only separated by a medial constriction. Jaws start forming. Macromeres start to cellularize and begin to form midgut epithelium. Proctodeum develops a cylindrical tube shape. The stomodeum and proctodeum get in contact with the midgut (Hauenschild and Fischer, 1969). Pigmented spots at the base of the parapodia increase in size. Additional pigment appears in the head region. Brain grows. Additional serotonergic cells in the brain. Segmental nerves can be identified. Muscles and nerves of the antennae, tentacular cirri anal cirri become visible.
has_obo_namespace: platynereis_stage
has_related_synonym: 75-6d mn
id: PdumDv:0001200
comment: At a temperature of 18 C this stages lasts from 75.00 hours till 96.00 hours.

Axiom
annotated source: mid nectochaete stage
annotated property: definition
annotated target: Developmental stage following Early nectochaete stage with the following key events: Formation of the antero-dorsal pair of tentacular cirri, anal cirri and antennal stubs. Body shape changes from torpedo-like into worm-like. Head distinguishable from the trunk due to a constriction. Adult eyes grow in size and are only separated by a medial constriction. Jaws start forming. Macromeres start to cellularize and begin to form midgut epithelium. Proctodeum develops a cylindrical tube shape. The stomodeum and proctodeum get in contact with the midgut (Hauenschild and Fischer, 1969). Pigmented spots at the base of the parapodia increase in size. Additional pigment appears in the head region. Brain grows. Additional serotonergic cells in the brain. Segmental nerves can be identified. Muscles and nerves of the antennae, tentacular cirri anal cirri become visible.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: mid nectochaete stage
annotated property: has_related_synonym
annotated target: 75-6d mn
database_cross_reference: PLATY:A.H.L.Fischer

late nectochaete stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: mid nectochaete stage
definition: Developmental stage following Mid-nectochaete stage with the following key events: Antennae elongate, palpi become visible, beginning of food intake. The antennae become long and slender. Palpi form on both sides of the mouth opening. The gut becomes functional and the larvae begin to feed. The midgut lumen is only slit-like. Lipid droplets begin to be resorbed to variable degree. Jaws grow rapidly and a secondary tooth is added. Transition progresses from pelago-benthic to fully benthic lifestyle. Brain continues to grow rapidly. Two additional serotonergic cells in the brain. Musculature around the stomodeum increases in complexity and a basket of muscles develops around the jaws to form the pharynx. Muscles and nerves, which are associated with the developing antennae, tentacular cirri, palpi and anal cirri increase in length. End of synchronized development.
has_obo_namespace: platynereis_stage
has_related_synonym: 6d-2w ln
id: PdumDv:0001300
comment: At a temperature of 18 C this stages lasts from 96.00 hours till 168.00 hours.

Axiom
annotated source: late nectochaete stage
annotated property: definition
annotated target: Developmental stage following Mid-nectochaete stage with the following key events: Antennae elongate, palpi become visible, beginning of food intake. The antennae become long and slender. Palpi form on both sides of the mouth opening. The gut becomes functional and the larvae begin to feed. The midgut lumen is only slit-like. Lipid droplets begin to be resorbed to variable degree. Jaws grow rapidly and a secondary tooth is added. Transition progresses from pelago-benthic to fully benthic lifestyle. Brain continues to grow rapidly. Two additional serotonergic cells in the brain. Musculature around the stomodeum increases in complexity and a basket of muscles develops around the jaws to form the pharynx. Muscles and nerves, which are associated with the developing antennae, tentacular cirri, palpi and anal cirri increase in length. End of synchronized development.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: late nectochaete stage
annotated property: has_related_synonym
annotated target: 6d-2w ln
database_cross_reference: PLATY:A.H.L.Fischer

three-segmented errant juvenile stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: late nectochaete stage
definition: Developmental stage following Late nectochaete stage with the following key events: No lipid droplets visible in the gut barrel-shaped midgut filled with food. Settlement metamorphosis completed during this stage. Growth of the fourth chaetigerous segment. Lipid droplets are totally resorbed. Jaws rapidly increase in size. More teeth are added. Spinning glands develop and start to form mucus. Palpi elongate slowly. Antennae, antero-dorsal tentacular cirri and anal cirri elongate rapidly. By the end of this stage, the forth chaetigerous segment is fully formed.
has_obo_namespace: platynereis_stage
has_related_synonym: 3 seg
id: PdumDv:0001410

Axiom
annotated source: three-segmented errant juvenile stage
annotated property: definition
annotated target: Developmental stage following Late nectochaete stage with the following key events: No lipid droplets visible in the gut barrel-shaped midgut filled with food. Settlement metamorphosis completed during this stage. Growth of the fourth chaetigerous segment. Lipid droplets are totally resorbed. Jaws rapidly increase in size. More teeth are added. Spinning glands develop and start to form mucus. Palpi elongate slowly. Antennae, antero-dorsal tentacular cirri and anal cirri elongate rapidly. By the end of this stage, the forth chaetigerous segment is fully formed.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: three-segmented errant juvenile stage
annotated property: has_related_synonym
annotated target: 3 seg
database_cross_reference: PLATY:A.H.L.Fischer

4- and 5-segmented errant juvenile stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: three-segmented errant juvenile stage
definition: Developmental stage following Three-segmented errant juvenile stage with the following key events: Fourth chaetigerous body segment fully formed; fifth chaetigerous segment growing or fully formed. Jaws grow rapidly and more teeth are added. The antero-ventral tentacular cirri form. Fifth chaetigerous segment is formed by the posterior growth zone. Pharynx develops into an eversible proboscis.
has_obo_namespace: platynereis_stage
has_related_synonym: 4-5 seg
id: PdumDv:0001510

Axiom
annotated source: 4- and 5-segmented errant juvenile stage
annotated property: definition
annotated target: Developmental stage following Three-segmented errant juvenile stage with the following key events: Fourth chaetigerous body segment fully formed; fifth chaetigerous segment growing or fully formed. Jaws grow rapidly and more teeth are added. The antero-ventral tentacular cirri form. Fifth chaetigerous segment is formed by the posterior growth zone. Pharynx develops into an eversible proboscis.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: 4- and 5-segmented errant juvenile stage
annotated property: has_related_synonym
annotated target: 4-5 seg
database_cross_reference: PLATY:A.H.L.Fischer

cephalic metamorphosis stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: 4- and 5-segmented errant juvenile stage
definition: Developmental stage following 4- and 5-segmented errant juvenile stage with the following key events: Loss of chaetae at the first pair of parapodia, which marks the beginning of the transformation of the first pair of parapodia into the posterior pair of tentacular cirri. The juveniles undergo cephalic metamorphosis by transforming the first pair of parapodia into the posterior pair of tentacular cirri. Larval eyes seem to disappear during metamorphosis. Palpi and antennae elongate slowly. Midgut elongates rapidly with the elongating body. Jaws grow in size and more teeth are added. Larvae build characteristic tubes in which they live.
has_obo_namespace: platynereis_stage
has_related_synonym: ceph m
id: PdumDv:0001520

Axiom
annotated source: cephalic metamorphosis stage
annotated property: definition
annotated target: Developmental stage following 4- and 5-segmented errant juvenile stage with the following key events: Loss of chaetae at the first pair of parapodia, which marks the beginning of the transformation of the first pair of parapodia into the posterior pair of tentacular cirri. The juveniles undergo cephalic metamorphosis by transforming the first pair of parapodia into the posterior pair of tentacular cirri. Larval eyes seem to disappear during metamorphosis. Palpi and antennae elongate slowly. Midgut elongates rapidly with the elongating body. Jaws grow in size and more teeth are added. Larvae build characteristic tubes in which they live.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: cephalic metamorphosis stage
annotated property: has_related_synonym
annotated target: ceph m
database_cross_reference: PLATY:A.H.L.Fischer

small atokous worm stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: cephalic metamorphosis stage
definition: Developmental stage following Cephalic metamorphosis stage with the following key events: Cephalic metamorphosis is finished and the posterior pairs of tentacular cirri are formed. The posterior growth zone buds off a series of further segments. Less than fifty segments. Anterior segments grow in size. The diameter of the worm increases.
has_obo_namespace: platynereis_stage
has_related_synonym: s atok
id: PdumDv:0001530

Axiom
annotated source: small atokous worm stage
annotated property: definition
annotated target: Developmental stage following Cephalic metamorphosis stage with the following key events: Cephalic metamorphosis is finished and the posterior pairs of tentacular cirri are formed. The posterior growth zone buds off a series of further segments. Less than fifty segments. Anterior segments grow in size. The diameter of the worm increases.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: small atokous worm stage
annotated property: has_related_synonym
annotated target: s atok
database_cross_reference: PLATY:A.H.L.Fischer

large atokous worm stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: small atokous worm stage
definition: Developmental stage following Small atokous worm stage with the following key events: Tubicolous worm with more than 50 segments. Sexually immature atokous worms start to produce gametes in the coelom. Growth rate slows until they possess up to 70 segments and the gametes start to mature within the body cavity.
has_obo_namespace: platynereis_stage
has_related_synonym: l atok
id: PdumDv:0001540

Axiom
annotated source: large atokous worm stage
annotated property: definition
annotated target: Developmental stage following Small atokous worm stage with the following key events: Tubicolous worm with more than 50 segments. Sexually immature atokous worms start to produce gametes in the coelom. Growth rate slows until they possess up to 70 segments and the gametes start to mature within the body cavity.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: large atokous worm stage
annotated property: has_related_synonym
annotated target: l atok
database_cross_reference: PLATY:A.H.L.Fischer

sexual metamorphosis stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: large atokous worm stage
definition: Developmental stage following Large atokous worm stage with the following key events: End of food intake resulting in an empty gut. Eyes increase in size. Some of the chromatophores degenerate. Maturing females are yellow and maturing males are whitish (anterior) and red (posterior). Posterior parapodia flatten and develop paddle-like chaetae. Major portion of the musculature degenerate and new a muscle type for rapid swimming develops.
has_obo_namespace: platynereis_stage
has_related_synonym: sex
id: PdumDv:0001550

Axiom
annotated source: sexual metamorphosis stage
annotated property: definition
annotated target: Developmental stage following Large atokous worm stage with the following key events: End of food intake resulting in an empty gut. Eyes increase in size. Some of the chromatophores degenerate. Maturing females are yellow and maturing males are whitish (anterior) and red (posterior). Posterior parapodia flatten and develop paddle-like chaetae. Major portion of the musculature degenerate and new a muscle type for rapid swimming develops.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: sexual metamorphosis stage
annotated property: has_related_synonym
annotated target: sex
database_cross_reference: PLATY:A.H.L.Fischer

adult (Heteronereis) stage
type: Class
subclass of: Platynereis life cycle stage
subclass of: Restriction
  on property: preceded_by
  some values from: sexual metamorphosis stage
definition: Developmental stage following Sexual metamorphosis stage with the following key events: Rapid swimming in straight lines. Nuptial dance. Synchronized by lunar periodicity. Mature animals become pelagic. Swarming and nuptial dance. The females release the eggs through disruptions/ fissures between the segments. Males release the sperm through a number of newly formed papillae at the posterior end. The eggs are fertilized in the water. After spawning, males and females die.
database_cross_reference: UBERON:0000113
has_obo_namespace: platynereis_stage
has_related_synonym: adult
id: PdumDv:0001600

Axiom
annotated source: adult (Heteronereis) stage
annotated property: definition
annotated target: Developmental stage following Sexual metamorphosis stage with the following key events: Rapid swimming in straight lines. Nuptial dance. Synchronized by lunar periodicity. Mature animals become pelagic. Swarming and nuptial dance. The females release the eggs through disruptions/ fissures between the segments. Males release the sperm through a number of newly formed papillae at the posterior end. The eggs are fertilized in the water. After spawning, males and females die.
database_cross_reference: PLATY:A.H.L.Fischer

Axiom
annotated source: adult (Heteronereis) stage
annotated property: has_related_synonym
annotated target: adult
database_cross_reference: PLATY:A.H.L.Fischer