dinoflagellate apex

GO:0097683 · Other · Subcellular region · Proposed

The anterior most point of a dinoflagellate epicone. [GO:0097683]

Synonyms: apex

Part of: dinoflagellate epicone (GO:0097613)

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

Taxonomic distribution

NCBITaxon:2864 Dinophyceae — VARIABLE: GO:0097683 defines the dinoflagellate apex as the anterior most point of a dinoflagellate epicone. [GO:0097683]

Mechanism graphs

Apex-epicone topology (FUNCTION)

The dinoflagellate apex is a cellular anatomical structure at the anterior end of the epicone, has GO:0097686 as a narrower horn-shaped thecate child class, and bears the apical groove.

Subject	Predicate	Object	Evidence
dinoflagellate apex	is a	cellular anatomical structure	`GO:0097683` The GO graph links GO:0097683 to GO:0110165 by rdfs:subClassOf.
dinoflagellate apex	is part of	dinoflagellate epicone	`GO:0097683` QuickGO lists GO:0097613 as an ancestor of GO:0097683. `GO:0097613` The QuickGO GO:0097613 children endpoint lists GO:0097683 as a part_of child term.
dinoflagellate apical horn	is a	dinoflagellate apex	`GO:0097683` The QuickGO GO:0097683 children endpoint lists GO:0097686 as an is_a child term. `GO:0097686` The GO:0097686 definition narrows the apical horn to a horn-shaped dinoflagellate apex found in thecate species.
dinoflagellate apical groove	is found on	dinoflagellate apex	`GO:0097685` The GO:0097685 definition describes the apical groove as a cell-surface furrow found on a dinoflagellate apex.

Discussions

CURATION_TODO (OPEN): Add apex molecular components only after directly localized constituents and exact source-neutral family groundings have been identified. GO defines the dinoflagellate apex as a point of the epicone, but this pass did not find exact family-level evidence for apex-specific molecular constituents.
INTERPRETATION (RESOLVED): Keep the horn-shaped thecate dinoflagellate apical horn separate from the general dinoflagellate apex unless curating the narrower GO:0097686 class. QuickGO lists GO:0097686 as an is_a child of GO:0097683 and GO:0097686 defines a horn-shaped apex found in thecate species, so the dinoflagellate apical horn should be modeled as a specialized apex rather than folded into the whole apex record as an exact synonym.

Evidence

GO:0097683 Gene Ontology cellular-component term for the dinoflagellate apex.
GO:0110165 Gene Ontology cellular-component parent term for cellular anatomical structure.
GO:0097613 Gene Ontology cellular-component term for the dinoflagellate epicone.
GO:0097686 Gene Ontology cellular-component term for the horn-shaped dinoflagellate apical horn of thecate species, which QuickGO lists as an is_a child of GO:0097683.
GO:0097685 Gene Ontology cellular-component term for the dinoflagellate apical groove found on the dinoflagellate apex.
PMID:7002229 PubMed record for Taylor 1980, the subscription Biosystems dinoflagellate-evolution review cited by GO:0097683; EuropePMC reported no PMC, open-access, full-text, or PDF route in this pass.
DOI:10.1016/0303-2647(80)90006-4 Crossref and EuropePMC metadata identify DOI:10.1016/0303-2647(80)90006-4 as the Taylor 1980 Biosystems review behind PMID:7002229; no article-body text was reachable through the checked metadata routes, so this record uses it only as bibliographic corroboration for the GO definition xref.

Curation history

2026-10-02T19:34:55Z codex · CREATED_RECORD — Scaffolded by scripts/new_record.py
2026-10-02T19:36:06Z codex · EXPANDED_RECORD — Added GO apex synonymy, GO cellular-anatomical-structure parentage, epicone parthood, apical-horn and apical-groove topology, Dinophyceae taxon evidence, Taylor 1980 metadata-only evidence, and curation discussions for molecular components and the apex/apical-horn boundary.
2026-10-02T19:48:26Z codex · ADDRESSED_PR_REVIEW — Addressed PR #1936 review issues #1937 and #1938 by adding GO:0097613 evidence to the apex-epicone graph edge and preserving the horn-shaped thecate qualifier for GO:0097686.

Source: data/structures/other/dinoflagellate_apex.yaml