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Anatomy Ontology
quadrate
- Term ID
- ZFA:0000621
- Synonyms
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- quadrates
- Definition
- The quadrate is the dorsal bone in the jaw joint with the anguloarticular of the lower jaw. Ossification of the quadrate, a cartilage bone, begins as a posteriorly projecting membranous spine between the symplectic cartilage and the preopercle (5.1 mm NL). The body of the quadrate ossifies first at the ball-and-socket articulation with the anguloarticular (6.5 mm). The adult quadrate is shaped roughly like an inverted triangle with a long, posteriorly projecting spine off its posteroventral edge. The presence of a posteroventral or posterior process of the quadrate is a synapomorphy of Teleostei.
- Appears at
- Larval:Days 7-13 (168.0h-14d, 4.5mm, 8 teeth)
- Evident until
- Adult (90d-730d, breeding adult)
- References
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- TAO:0000621
- Figures
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- Ontology
- Anatomy Ontology
- develops from
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- is part of
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- has parts
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- is a type of
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- overlaps
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