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General Information
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| Term |
ocular segment |
ID (Ontology) |
FBbt:00000005 (Fly Anatomy) |
| Definition |
Head segment derived from the second embryonic segment (between the labral and antennal segments). In the larva, this segment includes Bolwig's organ.[ FlyBase:FBrf0055841 FlyBase:FBrf0075072 ] |
| Comment |
While classically this structure is not considered to be a segment, but rather to be the non-segmental acron - anterior to the first segment, this ontology follows Schmidt-Ott and colleagues (Schmidt-Ott et al., 1994, and Schmidt-Ott and Technau, 1992) in considering it to be the second segment (posterior to the labral segment in the segmenting embryo). This is based on relating gene expression in the early segmenting embryo to the effects of loss of function mutations of these genes on formation of larval head structures. |
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Links to Extrernal Ontologies
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Annotations
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Records annotated with this term OR any of its CHILD TERMS
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Records annotated with this exact term (annotations to child terms are NOT included)
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| Data Class | Field | Records |
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| Alleles (FBal) | PHENOTYPE_MANIFEST_IN | 11 |
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Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
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| Full annotation statements | Relevant FlyBase reports |
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| Alleles | Images |
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ocular segment (all annotations which use CV term, excluding "NOT" statements) | 11 | 5 | ocular segment | germline clone | 1 | -- |
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Relationships