postparietal

1) extrascapula (one of several small bones bordering the posterior margin of the skull roof in primitive Teleostomi. They apparently originate from enlarged scales. One of a series of from 2-8 bones known variously as cervicals, nuchals, supratemporals or tabulars)

2) dermosupraoccipital (the superficial, paired dermal bone covering the supraoccipital with which it may fuse. In many Teleostei it is a hinge for the skull articulation with the circumorbital ring. Siluridae have a posterior toothed process that secures the nuchal disc. Also called parietooccipital or dermal supraoccipital)