These two species come from two locations very far apart one of the two that Madagascar should be Comitas melvilli Shepman , 1913 but the other that comes from New Guinea, what is.
Hi Roberto
It could be an other Comitas, no ? see https://science.mnhn.fr/institution/mnhn/collection/im/item/2009-17114?listIndex=31&listCount=63
Sorry, I am not a specialist for Turridae.
Dr. Philippe Bouchet from the Natural History Museum in Paris may be able to help you.
Sincerely yours,
Gerhard Haszprunar
Same genus but different species, and its difficult to identifie on picture, try to identifie according to morphology key.
I think neither is Schepman's species. Try starting with Powell, A.W.B. (1966) The molluscan families Speightiidae and Turridae an evaluation of the valid taxa, both Recent and fossil, with lists of characteristic species. Bulletin of the Auckland Institute and Museum, 5, 1–184, 23 pls
Hi Roberto - It could be Comitas eurina (Smith E.A., 1899). See the attack . Gianluigi
I have RN Kilburn in mind. He wrote a lot about the Indo-Pacific Turridae in the 1990s.
Also take a look to www.gastropods.com. Lots of pictures and references.
Turridae is very complex group.
Dr. Marien Faber unfortunately I do not own the Powell' s publication.
Dr. Gianluigi Bini the specimen from Mozambique is similar to Comitas eurina but the nodules are more frequent and the shell is little. I am enough sure that is Comitas melvilli. I saw the original design.
The problem is the other specimen from New Guinea it is another species but what?
I hope you can help Dr. Vladimir Gulbin from Vladivostok, seeRussian Far East Malaological Society.
Sorry, I do not work on marine gastropods, apart from the Mediterranean
Katerina
Sorry, I am not familiar with this group as well. Why don't you try to look at the website of World Register of Marine Species?
Hello,
The Comitas-species are very difficult to identify. The first shell from Madagascar is in my opinion not the Schepman (Surcula melvilli), which is from Banda Sea Indonesia.
The figure in the Schepman Siboga publications shows another shell. Though I cannot be sure, the Madagascar shell could be Comitas eurina (Smith, 1899).
For the second shell there are more oportunities, maybe C. luzonica or C. galathea.
For more Comitas-species the distribution area is very large!
thank you very much Jan Delsing you added something new and good to my research. my doubts are due to species distributions. Roberto Ardovini.
Both pictures look very well like Comitas erica Thiele, 1925. See: http://www.biolib.cz/en/taxon/id582328/
Thiele found the same shell in Zanzibar Straits (near to Madagascar) and in Indonesia (Sumatra coast). On the biolib-site you find a description by Powell, 1969.
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