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RE: On the subject of mysterious absences...The Answer

Quoting Tim Williams <twilliams_alpha@hotmail.com>:

David Marjanovic wrote:

wonder if Pterodaustro is the first known filter feeder to have evolved?

Among reasonably big vertebrates, you mean? Leedsichthys is older (Middle Jurassic and later).

_Pseudocetorhinus_ is even older (Triassic). It was an elasmobranch (maybe a synechodontiform).

What about _Mesosaurus_ (Permian)?

Nicholas J. Pharris
Department of Linguistics
Max Planck Institute for Evolutionary Anthropology
Deutscher Platz 6       phone:    +49 (0) 341 35 50 304
D-04103 Leipzig         fax:      +49 (0) 341 35 50 333
Germany                 e-mail:   nicholas_pharris@eva.mpg.de

"Creativity is the sudden cessation of stupidity."
    --Edwin H. Land