dinoflagellate antapex

GO:0097684 · Other · Subcellular region · Proposed

The anterior most point of a dinoflagellate hypocone. [GO:0097684]

Synonyms: antapex

Part of: dinoflagellate hypocone (GO:0097614)

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

Taxonomic distribution

NCBITaxon:2864 Dinophyceae — VARIABLE: GO:0097684 constrains the dinoflagellate antapex to Dinophyceae and defines it as a point of the dinoflagellate hypocone. [GO:0097684]

Mechanism graphs

Antapex-hypocone topology (FUNCTION)

The dinoflagellate antapex is a cellular anatomical structure within the hypocone, has the horn-shaped thecate antapical horn as a narrower child class, and can be reached by the dinoflagellate sulcal notch sulcus subclass.

Subject	Predicate	Object	Evidence
dinoflagellate antapex	is a	cellular anatomical structure	`GO:0097684` The QuickGO GO:0097684 history records an is_a relation to GO:0110165.
dinoflagellate antapex	is part of	dinoflagellate hypocone	`GO:0097684` The QuickGO GO:0097684 history records a part_of relation to GO:0097614. `GO:0097614` The QuickGO GO:0097614 payload lists GO:0097684 as a part_of child term.
dinoflagellate antapical horn	is a	dinoflagellate antapex	`GO:0097684` The QuickGO GO:0097684 children endpoint lists GO:0097687 as an is_a child term. `GO:0097687` The QuickGO GO:0097687 ancestors endpoint lists GO:0097684 among its ancestors.
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.

Discussions

CURATION_TODO (OPEN): Add antapex molecular components only after directly localized constituents and exact source-neutral family groundings have been identified. GO defines the dinoflagellate antapex as a point of the hypocone, but this pass did not find exact family-level evidence for antapex-specific molecular constituents.
INTERPRETATION (RESOLVED): Keep dinoflagellate antapical horn separate from the general dinoflagellate antapex unless curating the narrower GO:0097687 class. QuickGO identifies GO:0097687 as an is_a child of GO:0097684 and GO:0097687 defines a horn-shaped antapex found in thecate species, so the antapical horn should remain a specialized child class of the general antapex.

Evidence

GO:0097684 Gene Ontology cellular-component term for the dinoflagellate antapex.
GO:0110165 Gene Ontology cellular-component parent term for cellular anatomical structure.
GO:0097614 Gene Ontology cellular-component term for the dinoflagellate hypocone, which QuickGO lists among GO:0097684 ancestors.
GO:0097687 Gene Ontology cellular-component term for the horn-shaped dinoflagellate antapical horn of thecate species.
GO:0097618 Gene Ontology cellular-component term for the dinoflagellate sulcal notch, a sulcus subclass 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.

Curation history

2026-10-02T20:53:34Z codex · CREATED_RECORD — Scaffolded by scripts/new_record.py
2026-10-02T20:54:29Z codex · EXPANDED_RECORD — Added GO antapex synonymy, GO cellular-anatomical-structure parentage, hypocone parthood, antapical-horn and sulcal-notch topology, Dinophyceae taxon evidence, and curation discussions for molecular components and the antapex/antapical-horn boundary.
2026-10-02T21:09:34Z codex · ADDRESSED_PR_REVIEW — Addressed PR #1942 review issues #1943 and #1944 by citing GO:0097684 direct parthood history for the antapex-hypocone edge and materializing the GO:0097618 sulcal-notch to GO:0097612 sulcus parent edge.

Source: data/structures/other/dinoflagellate_antapex.yaml