Dear All:

Are Chlorostoma lischkei Tapparone-Canefri, 1874

and C.  turbinatum A.Adams, 1853 separate species,

or are they just subspecies of C. argyrostoma?

I found specimens that resemble C. lischkei (with

closed umbilicus) on the west side of Lamma Island,

Hong Kong, on  open-water, wave-swept rocks.

In a quiet bay on the east side, I found specimens that

resemble C. turbinatum (with opened umbilicus).

Is the closed umbilicus just an adaptation to high

surf action? I think they may be the same species,

just with a different shell morphology in different

habitat.

Thanks,

Andrew

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