Archaeopterygidae

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See Archaeopterygidae in Wikipedia, the free encyclopedia.

Archaeopterygidae is the monotypic containing clade of the Jurassic bird Archaeotperyx lithographica. Autapomorphies of Archaeotperygidae include (following Elzanowski 2002):

a) Premaxilla with four teeth.

b) Eight to nine teeth on the maxilla.

c) 11-12 teeth on the dentary.

d) Tooth crowns constricted.

e) Premaxilla overhangs dentary.

f) Mandible lacks a mandibular fenestra.

g) Furcula lacks a hypocleidum.

h) Preglenoid of coracoid wing-shaped.

i) Presacral count 23, sacral count five.

JGK