Morphological proxies for taxonomic decision in turrids (mollusca, neogastropoda): a test of the value of shell and radula characters using molecular data.
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 .
Kantor
Yuri I
YI
Russian Academy of Sciences, Leninski Prosp. 33, Moscow 119071, Russia.
Puillandre
Nicolas
N
Olivera
Baldomero M
BM
Bouchet
Philippe
P
D000818:Animals; D008974:Mollusca / Q000145:classification* / Q000235:genetics / Q000648:ultrastructure*; D010802:Phylogeny; D013045:Species Specificity