I'm having trouble finding information on Lirobittium asperum (Carpenter,
1864). It was described from the middle Pleistocene Santa Barbara
Formation in Santa Barbara, southern California and has been reported in
fossil deposits of Pliocene to middle Pleistocene age from southern to
central California. I can find no record of it being a living species.
However I did find one web site that synonymies it with L. rugatum
(Carpenter, 1864) which is a living species. However I can't find any
reference to why or who made this assumption (that the two are the same).
None of my standard references (McLean's publications) list L. asperum and
the one that lists L. rugatum does not include L. asperum with it. Any
help would be appreciated.
Charles L Powell, II
Western Earth Surface Processes Team, MS 975
U. S. Geological Survey
345 Middlefield Rd.
Menlo Park, CA 94025