Ossified pars articularis of the palatoquadrate cartilage. [ http://en.wikipedia.org/wiki/Quadrate_bone ]

Synonyms: quadrate bone quadrate

This is just here as a test because I lose it

Term information

database cross reference
Subsets

efo_slim

plural term
quadrates [ ZFA:0000621 ]

axiom lost from external ontology

relationship loss: overlaps quadrate-metapterygoid joint (TAO:0001803)[TAO]

relationship loss: overlaps quadrate-hyomandibula joint (TAO:0001801)[TAO]

external comment

The quadrate commonly has a triangular shape, with its lower vertex, or condyle, for articulation with the lower jaw, and an elongate postero-ventral or postero-dorsal elongate process. The presence of an elongate postero-ventral or postero-dorsal process is a synapomorphy of teleosts (Arratia and Schultze, 1990; Arratia, 1999).[TAO]

external definition

Endochondral bone that commonly articulates with the ectopterygoid anteriorly, the metapterygoid dorsally, and the symplectic postero-medially. The quadrate is formed from the posterior part of the palatoquadrate cartilage, or pars quadrata. The quadrate is a paired bone.[TAO]

external ontology notes

Endochondral bone that commonly articulates with the ectopterygoid anteriorly, the metapterygoid dorsally, and the symplectic postero-medially. The quadrate is formed from the posterior part of the palatoquadrate cartilage, or pars quadrata. The quadrate is a paired bone.

has broad synonym

quadrate - incus

homology notes

According to this theory (Reichert-Gaupp theory), the mammalian stapes is derived from the reptilian columella, the incus from the quadrate and the malleus from the articular (...).[well established][VHOG]

id

UBERON:0006597

taxon notes

In snakes, the quadrate bone has become elongated and very mobile, and contributes greatly to their ability to swallow very large prey items. In mammals the articular and quadrate bones have migrated to the middle ear and are known as the malleus and incus.