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25 November 2008 Morphological Proxies for Taxonomic Decision in Turrids (Mollusca, Neogastropoda): a Test of the Value of Shell and Radula Characters Using Molecular Data
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Abstract

The state of the art of turrid (=Turridae s. l.) systematics is that shells — when they include the protoconch — are reliable species-level identifiers, but inadequate proxies for allocation to genera or subfamilies. Generally, the radula is used for allocation to a (sub)family, but the hypothesis that the radula is a more adequate proxy than the shell for relationships has not yet been tested by molecular data. Species of Xenuroturris may have drastically different radulae, with either “semi-enrolled” or “duplex” marginal teeth, although their shells are very similar or even almost indistinguishable. Molecular data confirm that specimens with different types of radulae constitute different species, but two species of a pair with respectively semi-enrolled and duplex teeth end up being not closely related. However, it is still unresolved whether species with semi-enrolled (=Iotyrris) and duplex teeth (=Xenuroturris) form two supported monophyletic clades. Iotyrris devoizei n.sp. and I. musivum n.sp. are described from Vanuatu, where they occur sympatrically with I. cingulifera and Xenuroturris legitima.

Yuri I. Kantor, Nicolas Puillandre, Baldomero M. Olivera, and Philippe Bouchet "Morphological Proxies for Taxonomic Decision in Turrids (Mollusca, Neogastropoda): a Test of the Value of Shell and Radula Characters Using Molecular Data," Zoological Science 25(11), (25 November 2008). https://doi.org/10.2108/zsj.25.1156
Received: 5 October 2007; Accepted: 1 August 2008; Published: 25 November 2008
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