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Archaeoistiodactylus, new Jurassic pterosaur from China
From: Ben Creisler
In case this new pterosaur has not been mentioned yet:
Lü Junchang and Fucha Xiaohui (2010)
A new pterosaur (Pterosauria) from Middle Jurassic
Tiaojishan Formation of western Liaoning,China.
Global Geology Z1: 113-118
A new pterosaur Archaeoistiodactylus linglongtaensis gen.
et sp. nov. is erected based on an incomplete skeleton
with a partial skull and lower jaw. The new taxon is
characterized by circular tooth sockets of anterior
mandibular teeth,the anterior teeth of the upper jaw
bearing posteriorly directed crowns,a relatively short
metacarpus,and wing phalanges 2 and 3 and the tibia
subequal in length. It possesses some plesiomorphic
characters such as short metacarpals and circular tooth
sockets. The pointed jaw tip present in the new taxon
indicates that the expanded jaw tips of later
istiodactylids are a derived character state,and the new
taxon represents the first istiodactylus-like pterosaur
found from the pre-Late Jurassic deposits,which provides
a key role in our understanding the origin and evolution
of the known istiodactylid pterosaurs.
Archaeoistiodactylus is regarded as the ancestor form of
the known istiodactylid pterosaur.