Hyman LH (citation)- p 333, "Plehn had specimens of this species from two localities on the Pacific coast of South America; she spoke of them as varieties but did not give them varietal names. The Chile specimen, taken from the bottom of a boat at Valparaiso and hence not native to the locality, differs from the present Mexican specimens in the distincly separated gonopores, the more pointed penis papilla, and the relatively short Lang's vesicle. The other specimen, from the Peruvian coast, closely resembles the Mexican specimens in the common shallow antrum and more rounded penis papilla, but the Lang's vesicle, although longer half as long as that of the Mexican specimens. The latter can therefore be regarded as a Mexican variant of the species. The species evidently shows considerable geographic variation but splitting it into distinct species appears unjustified."
Notes for the valid (accepted) taxonomic name
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