> The only remaining "cloud" in the nomenclatorial/taxonomic sky is
> Pleuroceratidae Pchelintsev and Korobkov, 1960. Is it a freshwater
> cerithiodean (as per the always-suspect www) or an ammonite or, however
> unlikely, something else. In other words, is this family-group name based on
> Pleuroceras Cossmann, 1909, an objective synonym of Pleurocera Rafinesque,
> 1818 as demonstrated by David, or Pleuroceras Hyatt, 1874, a Mesozoic coiled
> ammonite?

There are some www citations of Pleuroceratidae as an ammonite, but
nothing too clear that I can find.  As Bouchet and Rocroi do not list
Pleuroceratidae, I suspect it may be the ammonite; however, it could
also be omitted as a misspelling.  They cite Pchelintsev and Korobkov
(eds) 1960. Osnovy Paleontologii, Molliuski, Briukhonogie
[Fundamentals of Paleontology, Molluscs, Gastropods].  Nauka, Moscow.
Pchelintsev seems to have mainly worked on the Mesozoic, which would
fit more with the ammonite, but the volume being about gastropods
(assuming there isn't another P&K 1960) would favor a snail.  On the
other hand, Pleuroceras is an important index fossil and could quite
easily be mentioned in a large paleontology text that focused on
snails.

--
Dr. David Campbell
425 Scientific Collections
University of Alabama
"I think of my happy condition, surrounded by acres of clams"

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