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Re: Longipteryx chaoyangensis (Aves, Enantiornithes?)



Jaime A. Headden wrote-

>   However, what's really interesting is the following
> photograph, which is on the cover the publication:
>
>   http://www.scichina.com/ky/0111/kyfm11.stm
>
>   Here, the animal is compelete and is shown covered in
> filamentous integument and not a "true" feather in sight. These
> filaments are preseved along both arms, around the head and
> neck, rump and legs, and possible even between the thoracic elements....

And there are uncinate processes in this supposed enantiornithine!  Here's
the abstract-

Early diversification of birds: Evidence from a new opposite
bird

ZHANG Fucheng1, ZHOU Zhonghe1, HOU Lianhai1 & GU Gang2

1. Institute of Vertebrate Paleontology and Paleoanthropology, Chinese
Academy of Sciences, Beijing 100044, China;
2. Institute of Archaeology of Liaoning Province, Shenyang 120003, China

Abstract
A new enantiornithine bird Longipteryx chaoyangensis gen. et sp. nov. is
described from the Early Cretaceous Jiufotang Formation in Chaoyang, western
Liaoning Province. This new bird is distinguishable from other known
enantiornithines in having uncinate processes in ribs, elongate jaws,
relatively long wings and short hindlimbs, and metatarsal ¢ô longer than
metatarsals ¢ò and ¢ó. This new bird had probably possessed (¢¡) modern
bird-like thorax which provides firm attachment for muscles and indicates
powerful and active respiratory ability; (¢¢) powerful flying ability; (¢£)
special adaptation for feeding on aquatic preys; and (¢¤) trochleae of
metatarsals ¢ñ¡ª¡ªIV almost on the same level, an adaptation for perching.
The new bird represents a new ecological type different from all known
members of Enantiornithes. It shows that enantiornithines had probably
originated earlier than the Early Cretaceous, or this group had experienced
a rapid radiation right after it first occurred in the early Early
Cretaceous.

Mickey Mortimer