"News" on Zoila venusta

by Felix Lorenz

 In recent months different people have sent me pictures of a "spectacular new variety" of venusta from "deep water, expecting a response such as "whow, I am going to name that after you". Some dealers have sold these shells as the rare eastern form profunda, which is an interpretation that might apply to the point that they are mostly from deeper water, although other conchological aspects do not quite match profunda (see below). One dealer has ascertained his customer that "Lorenz is presently naming this". Another one told me there already is a name. These assumption force me to write a comment, and I apologize to my colleagues if it may cause inconvenience from collectors complaining about their purchase.

The shells in question are: more heavy and somewhat rostrate, with a narrow aperture and a "completely different pattern" and from "deep water", that is between 50 and 60 m. As locality data I have been given "Bunbury", "Albany area" and also "offshore Western Australia". Having gone through my collection I found similar shells, from various localities, that displayed these features, the most typical ones coming from Investigator Island, Esperance, taken by diver at 48 m. I am illustrating these below. Personally I do not think that they are "new", the only noteworthy fact they seem to display is that certain deep water populations of venusta tend to have rostrate extremities and a callused base.

venusta roseopunctata, 63,9 mm, callused, somewhat rostrate. So-called "spectacular new variety" from "deep water". Investigator Island, Esperance, 48 m

venusta roseopunctata, 69,2 mm, callused, somewhat rostrate. So-called "spectacular new variety" from "deep water". Investigator Island, Esperance, 48 m

venusta roseopunctata, 67,7 mm, callused, somewhat rostrate. Immaculate specimen (- may be an even newer sub-form?!) of the so-called "spectacular new variety" from "deep water". Investigator Island, Esperance, 48 m

venusta roseopunctata f. profunda, 78,3 mm. Note the coarse labral teeth. Great Australian Bight 110-150 m

venusta venusta 95,3 mm. Abrolhos Islands, taken from fishtrap at 60 m.
This is just one example how far rostration and basal callosity can go in venusta, without any taxonomic implication.

venusta venusta 71,1 mm. Abrolhos Islands, from fishtrap off 60 m. Less rostrate specimen of the western population.


© F. Lorenz Aug. 2005