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Re: Ducks present and past (was Re: ARE ORNITHOPODS BORING?)
At 16:38 14-02-2001 -0600, you wrote:
>Anyway, while on the subject of ducks, I came across this paper:
>Olson, S.L. (1999). The anseriform relationships of Anatalavis Olson and
>Parris (Anseranatidae), with a new species from the lower Eocene London
>Clay. Smithsonian Contributions to Paleobiology. 1999; (89): 231-243.
>Abstract: "An associated partial skeleton, including the skull but lacking
>legs, from the lower Eocene London Clay of Essex, England, possesses derived
>characters of the coracoid and furcula that show it to belong to the
>Anseranatidae, which previously had no fossil record. Except for its much
>larger size, the humerus of this specimen is identical to that of Anatalavis
>rex (Shufeldt) from the late Cretaceous or early Paleocene of New Jersey.
>The Eocene specimen is described as a new species, Anatalavis oxfordi, and
>the genus Anatalavis is transferred from the form-family Graculavidae to a
>new subfamily, Anatalavinae, of the Anseranatidae. Anatalavis is
>characterized by a very broad duck-like bill, a proportionately very short
>and robust humerus, and an anterior portion of the pelvis resembling that of
>ibises and other wading birds more than that of any known anseriform. Other
>features of its osteology are unique within the order."
>As the abstract says, Storrs Olson believes _Anatalavis_ to be most closely
>related to the magpie goose among modern avians. Olson and Parris (1987)
>previously reported _Anatalavis_ from New Jersey, as one of several species
>of birds from the Navesink and Hornerstown formations. To anyone's
>knowledge have either of these formations been pinned down to either late
>Upper Cretaceous or early Paleocene?
Somewhere I've red that Gareth Dyke doesn't believe, the genus belongs in
the Anseranatidae, I can't remember the ref, but maybe he can tell us more!
>Timothy J. Williams
>Iowa State University
>Ames IA 50014
>Phone: 515 294 9233
>Fax: 515 294 3163
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