opisthotic


Also found in: Dictionary, Medical.

opisthotic

[¦ä·pəs¦thäd·ik]
(anatomy)
Of, relating to, or being the posterior and inferior portions of the bony elements in the inner ear capsule.
Mentioned in ?
References in periodicals archive ?
Each exoccipital articulates with the caudolateral edge of the supraoccipital and laterally with the caudomedial edge of the opisthotic, as well as ventrally and medially with the basioccipital (Figure 1D).
Caudally it articulates with the rostral edge of the opisthotic and laterally with the dorsomedial edge of the quadrate (Figure 1D).
Squamosal (Sq): viewed dorsally, the squamosal forms a joint with the lateral edge of the opisthotic.
The parieto-squamosal arches are narrow and pass above, but not posterior to the rear margin of the opisthotic bones.
For example, the snout is pointed (as in Batrachemys), the parietals are broadened above (as in Phrynops), the parieto-squamosal arches are narrow (as in Batrachemys); the parieto-squamosal arches pass directly above but not posterior to the rear margin of the opisthotic bones (as in Phrynops), and the first neural bone is absent, allowing the first pair of costals to contact medially (as in Batrachemys).
The parieto-squamosal arch is substantial and passes above but not posterior to the rear margin of the opisthotic bones.