dinoflagellate hypocone

GO:0097614 · Other · Subcellular region · Proposed

The part of a dinoflagellate cell below the cingulum; also referred to as the posterior portion of a dinoflagellate cell. It is separated from the epicone by the cingulum. [GO:0097614]

Synonyms: hypocone; hyposome; hypotheca

Has part: dinoflagellate antapex (GO:0097684)

UniProt location names: UniProt Consortium, CC BY 4.0. Reference label and route sources.

Taxonomic distribution

NCBITaxon:2864 Dinophyceae — VARIABLE: GO:0097614 defines the dinoflagellate hypocone as the part of a dinoflagellate cell below the cingulum. [GO:0097614]

Mechanism graphs

Hypocone topology (FUNCTION)

The dinoflagellate hypocone is a cellular anatomical structure that has the dinoflagellate antapex as a part, lies posterior to the epicone, is separated from the epicone by the cingulum, and can appear bilobed when a sulcal notch extends to the antapex.

Subject	Predicate	Object	Evidence
dinoflagellate hypocone	is a	cellular anatomical structure	`GO:0097614` The GO graph links GO:0097614 to GO:0110165 by rdfs:subClassOf.
dinoflagellate hypocone	has part	dinoflagellate antapex	`GO:0097614` The QuickGO GO:0097614 payload lists GO:0097684 as a part_of child term.
dinoflagellate hypocone	is separated from	dinoflagellate epicone	`GO:0097614` The GO:0097614 definition describes the cingulum as separating the hypocone from the epicone.
dinoflagellate cingulum	separates	dinoflagellate hypocone	`GO:0097614` The GO:0097614 definition states that the hypocone is separated from the epicone by the cingulum.
dinoflagellate cingulum	separates	dinoflagellate epicone	`GO:0097614` The GO:0097614 definition states that the hypocone is separated from the epicone by the cingulum.
dinoflagellate sulcal notch	is a	dinoflagellate sulcus	`GO:0097618` The GO graph links GO:0097618 to GO:0097612 by rdfs:subClassOf.
dinoflagellate sulcal notch	extends to	dinoflagellate antapex	`GO:0097618` The GO:0097618 definition defines a sulcal notch as a dinoflagellate sulcus that extends to the posterior antapex.
dinoflagellate sulcal notch	gives bilobed appearance to	dinoflagellate hypocone	`GO:0097618` The GO:0097618 definition states that a sulcal notch makes the dinoflagellate hypocone appear bilobed.

Discussions

CURATION_TODO (OPEN): Add hypocone molecular components only after directly localized constituents and exact source-neutral family groundings have been identified. GO defines the dinoflagellate hypocone as a subcellular region below the cingulum, but this pass did not find exact family-level evidence for hypocone-specific molecular constituents.
INTERPRETATION (RESOLVED): Keep dinoflagellate antapex separate from the general dinoflagellate hypocone unless curating the narrower GO:0097684 class. QuickGO lists GO:0097684 as a part_of child of GO:0097614, so the dinoflagellate antapex should be modeled as a hypocone part rather than folded into the whole hypocone record as an exact synonym.
INTERPRETATION (RESOLVED): Keep dinoflagellate epicone separate from the dinoflagellate hypocone because GO models it as the anterior counterpart. GO:0097613 is the anterior counterpart of GO:0097614 and is separated from the hypocone by the cingulum, so it should not be modeled as a synonym or part of the posterior hypocone region.
INTERPRETATION (RESOLVED): Keep dinoflagellate sulcal notch separate from the whole dinoflagellate hypocone unless curating the narrower GO:0097618 class. GO:0097618 is a subclass of the dinoflagellate sulcus that extends to the antapex and can make the hypocone appear bilobed; it is adjacent to the hypocone boundary rather than a subtype or synonym of the whole posterior hypocone.

Evidence

GO:0097614 Gene Ontology cellular-component term for the dinoflagellate hypocone.
GO:0110165 Gene Ontology cellular-component parent term for cellular anatomical structure.
GO:0097684 Gene Ontology cellular-component term for the dinoflagellate antapex, which QuickGO lists as a part_of child of GO:0097614.
GO:0097618 Gene Ontology cellular-component term for the dinoflagellate sulcal notch, a narrower sulcus morphology that extends to the antapex and can make the hypocone appear bilobed.
GO:0097612 Gene Ontology cellular-component term for the dinoflagellate sulcus, the parent class of GO:0097618.
GO:0097611 Gene Ontology cellular-component term for the dinoflagellate cingulum named in the GO:0097614 definition.
GO:0097613 Gene Ontology cellular-component term for the dinoflagellate epicone named in the GO:0097614 definition.

Curation history

2026-10-02T18:49:37Z codex · CREATED_RECORD — Scaffolded by scripts/new_record.py
2026-10-02T18:50:48Z codex · EXPANDED_RECORD — Added GO hypocone synonymy, GO cellular-anatomical-structure parentage, dinoflagellate antapex part topology, Dinophyceae taxon evidence, record-level adjacent GO evidence, and curation discussions for molecular components and the hypocone/antapex and hypocone/epicone boundaries.
2026-10-02T19:06:25Z codex · ADDRESSED_PR_REVIEW — Addressed PR #1933 review issues #1934 and #1935 by adding the reciprocal cingulum-to-epicone boundary edge and modeling GO:0097618 dinoflagellate sulcal notch as a sulcus subclass that extends to the antapex and changes hypocone appearance.

Source: data/structures/other/dinoflagellate_hypocone.yaml