AI Article Synopsis
- The Turridae family systematics suggests that shells, when including a protoconch, can identify species reliably but are not effective for determining genera or subfamilies.
- The radula is typically used to classify (sub)families, yet its effectiveness compared to shells for revealing relationships remains untested with molecular data.
- Recent molecular studies indicate that different radula types in Xenuroturris species correspond to different species, but the relationship between these radula types (Iotyrris with semi-enrolled teeth and Xenuroturris with duplex teeth) is still unclear, with new species being identified from Vanuatu.
Article 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 .
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| http://dx.doi.org/10.2108/zsj.25.1156 | DOI Listing |
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