Turbonilla Risso, 1826

Thivaiou, Danae, Harzhauser, Mathias & Koskeridou, Efterpi, 2019, Early Miocene Gastropods from the Felli Section (Proto-Mediterranean Sea NW Greece), Geodiversitas 41 (8), pp. 323-366 : 356

Genus Turbonilla Risso, 1826

TYPE SPECIES. — Turbonilla costulata Risso, 1826 (= Turbonilla lactea (Linnaeus, 1758)) , subsequent designation by Hermannsen (1852). Pleistocene, France.

REMARK

The genus Turbonilla is characterized by species with elongated and ornate shells, and type A helicoidal protoconchs ( Peñas & Rolán 2010). As shown by Schander et al. (2003) relationships within some major gastropod clades have still not been studied. The Pyramidellidae is one such group, comprising more than 6000 named species in more than 350 genera. We sequenced part of the mitochondrial 16S gene from 32 species in an attempt to clarify pyramidellid phylogeny and employed a successive alignment approach that allowed us to maximize the phylogenetic signal of the data. Neighbour-joining, maximum parsimony and likelihood analyses recovered two distinct clades. One clade consisted of Noemiamea which nested within Odostomia (sensu stricto, the subfamily Turbonillinae Bronn, 1849 is polyphyletic. In the work by Landau & LaFollette (2015) on Miocene deposits of Venezuela it was possible to differenciate between Chemnitzia d’Orbigny 1840 and Turbonilla s.s. Risso, 1826. Herein, we use Turbonilla s.l. since the preservation of the shells does not allow a certain generic attribution or identification to the species level.