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Move anal tooth part_of to holothurian cloaca (follow-up to #3789) #3790

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Move anal tooth part_of to holothurian cloaca (follow-up to #3789) #3790

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d9758bc
Move anal tooth (UBERON:0012468) part_of to holothurian cloaca
github-actions[bot] Oct 15, 2026
fe3a27c
Merge remote-tracking branch 'origin/master' into ai4c-agent-pull_req…
matentzn Oct 23, 2026
1f4db86
Repoint anal tooth to holothurian cloaca's new ID UBERON:1200386 (ren…
matentzn Oct 23, 2026
e68b95c
Merge branch 'master' into ai4c-agent-pull_request-3789-run2033-anal-…
matentzn Oct 23, 2026
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2 changes: 1 addition & 1 deletion src/ontology/uberon-edit.obo
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Expand Up @@ -152884,7 +152884,7 @@ synonym: "calcified anal papilla" RELATED []
synonym: "cloacal tooth" RELATED []
synonym: "perianal tooth" RELATED []
intersection_of: UBERON:0003913 ! tooth-like structure

@matentzn matentzn Oct 23, 2026

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This one predates the PR, but while we're here: tooth-like structure is defined as an organ "found in the mouth or pharynx ... used in procuring or masticating food" and carries capable_of_part_of mastication. Anal teeth don't chew anything. This is the terminological trap @cmungall described on #3789: the label says "tooth" and the axioms bought into it.

I'd drop the intersection_of and go with something like:

is_a: UBERON:0008247 ! tube foot
relationship: part_of UBERON:0001353 ! anal region

plus a def that says what they are, e.g. "A heavily calcified tube foot, typically one of five, that guards the anus in some Holothuriidae (e.g. Actinopyga)." Then in_taxon could go to Holothuroidea (NCBITaxon:7705) while we're at it.

intersection_of: part_of UBERON:0001353 ! anal region
intersection_of: part_of UBERON:1200386 ! holothurian cloaca

@matentzn matentzn Oct 23, 2026

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Make sure that anal teeth are really part of the cloaca. Samyn et al. 2006 (Zootaxa 1138, https://www.vliz.be/imisdocs/publications/78114.pdf), Actinopyga diagnosis: "anus dorsal to terminal, guarded by five, nearly always prominent, heavily calcified terminal tube feet (= "anal teeth")". So they're podia, body wall / water vascular appendages ringing the anal opening, not part of the terminal gut chamber. And since this is an intersection_of, anything tooth-like that's part of the holothurian cloaca gets classified as an anal tooth.

The old part_of anal region was at least right about position. I'd keep that, and at most add adjacent_to the holothurian cloaca (or its opening).

relationship: in_taxon NCBITaxon:7586 ! Echinodermata

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