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Post by brunni on May 12, 2011 10:47:16 GMT
I'm new to the Forum, so hope this is going to work OK. A friend of mine found this shell dead on the beach near Lobito Harbour in Angola. Nearby was a small river so I guess the dead snail got washed down the river. Its 64.7mm long and obviously a species of Achatinidae. At first I thought it was a Pseudachatina sp., but later because of the protoconch shape, I believe it must be a Lignus sp. Trouble is I cannot find any species that match this nor any record of Lignus south of the Cameroons. Anybody got any ideas as to identity ? .....................PS 12 Jan. 2011 stub heading amended Attachments:
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Post by brunni on Jan 11, 2012 18:54:22 GMT
The puzzle I posted in my very first post ( almost a year ago ! ) remains unanswered. I recently read Studies in the Genus Pseudachatina Albers, PAIN & PAUL 1967. Two specimens illustrated in this publication resemble my specimen from Angola ( working on this ). Seems after all to be a Pseudachatina sp. and not a Lignus sp. Plate V, Fig. 1. Pseudachatina gabonensis SHUTTLEWORTH, lectotype Plate V, Fig. 2. Pseudachatina dennisoni PFEIFFER, <<Metatype>>
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Post by brunni on Jan 12, 2012 10:09:07 GMT
My specimen is probably Pseudachaina gabonensis Shuttleworth, 1856. The last drawing ( not to scale ) is from Pain & Paul, 1957, page 55, fig. C ( Lectotype, Shuttleworth coll. MHNB, Gabon ). Notice similarity in the nipple-like protoconch, lack of axial sculpture ( most of the Pseudachatina species are ribbed/knobbly/striated ), similar size and the sutural collar. Also gabonensis is the southernmost of the Pseudachatina species, having been described from Gabon, a country not too far away from Angola.
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