The anatomy of Cochlespira Conrad (Gastropoda, Conoidea, Turridae) with a description of a new species from the Southeastern coast of Brazil

Abstract

ABSTRACT. The anatomy of Cochlespira elongata, a new species from continental slope of Sao Paulo coast, Brazil, is described. This analysis shows some interesting characters in the foregut, with rhynchodeal walls muscular and free ti'om the haemocoel and inseltion of venom gland in mid region of the esophagus; in the osphradium, with bilobed right filaments; and in the penis, with a complex arrangement of structures in the tip. A complementary description of Coch/espira radiata (Dall, 1889a) from Florida, USA, is also given, for a better comparison between both species.

Exon-Capture-Based Phylogeny and Diversification of the Venomous Gastropods (Neogastropoda, Conoidea)

“…Furthermore, Cochlespiridae being sister group to all the other Conoidea also explains their unusual for Conoidea venomous apparatus structure. In all members of Cochlespiridae, the venom gland opens into the oesophagus either within the nerve ring or even posterior to it (Medinskaya 1999;Simone 1999;Kantor, Fedosov, et al 2018). In all the other conoideans, the venom gland passes through the nerve ring and opens in the buccal cavity just posterior to the opening of the radular sac, thus likely increasing the efficiency of the injection of the toxins in the prey (Taylor et al 1993;Fedosov et al 2017).…”

Phylogeny of the Caenogastropoda (Mollusca), based on comparative morphology

“…Based on these dissimilarities between the valves and other esophageal structures found in some conoideans, the valve of Leiblein has been here considered as an exclusivity of branch 210, i.e., a synapomorphy of the neogastropods excluding the Conoidea. There are further reasons for excluding the conoideans as a valve-bearing group, as the more basal species of conoidean in esophageal aspects, Cochlespira (Simone, 1999c) (node 180), in which the venom gland inserts more posteriorly in the esophagus (in a fashion more similar to that of the muricoideans), has no vestige of a valve. Neither is any kind of valve found in ontogenetic studies on conoideans (Ball, 2002).…”

Annotated list of type specimens of mollusks deposited in Museu de Zoologia da Universidade de São Paulo, Brazil

“…Brocchinia harasewychi Brocchinia verheckeni Genus Gergovia Cossmann, 1899 Gergovia petiti Genus Iphinopsis Dall, 1924 Iphinopsis splendens Simone & Birman, 2006bGenus Microcancilla Dall, 1924 Microcancilla jonasi Barros & Petit, 2007 conoidea turridae Genus Cochlespira Conrad, 1865 Cochlespira elongata Simone, 1999b(Figs. 160-161) Genus Diptychophlia Berry, 1964 Diptychophlia hubrechti Genus Gemmula Weinkauff, 1875 Gemmula mystica Simone, 2005 terebridae Genus Terebra Bruguière, 1789 Terebra colombiensis Terebra crassireticula Simone, 1999 (Figs.…”