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Conchologists of America List <[log in to unmask]>
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Thu, 11 Jan 2001 11:02:44 -0500
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Harold Vokes published several additions and corrections, including a revised version, of his Bivalvia catalogue.  If I recall correctly, the first was about 1967, the revised edition 1980, and updates were published in Tulane Studies in Geology and Paleontology around 1990.

The taxonomy and phylogenetics of early and mid-Paleozoic bivalves is still in a flux, so that must be regarded with caution no matter what the source.

Most of the categories appear monophyletic, though their relationships may change a bit.  A few aspects of Recent bivalve classification that seem likely to change based on DNA and other data:
Ungulinidae may not belong with Lucinoidea
Gastrochaenoidea is not closely related to Myoidea
Plicatuloidea and Anomioidea are close relatives, and in turn close to Pectinoidea
Ostreoida is closest to Pterioida, not Pectinoida
Cyamioidea is probably polyphyletic, including both neotenic relatives of Veneroidea and galeommatoidean relatives
Xenoturbella appears to be a shellless, highly modified protobranch

    Dr. David Campbell
    "Old Seashells"
    Biology Department
    Saint Mary's College of Maryland
    18952 E. Fisher Road
    St. Mary's City, MD  20686-3001 USA
    [log in to unmask], 301 862-0372 Fax: 301 862-0996
"Mollusks murmured 'Morning!'.  And salmon chanted 'Evening!'."-Frank Muir, Oh My Word!

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