Neostromboidea, Maxwell & Dekkers & Rymer & Bradley C. Congdon, 2019

Maxwell, Stephen J., Dekkers, Aart M., Rymer, Tasmin L. & Bradley C. Congdon,, 2019, Recognising and defining a new crown clade within Stromboidea Rafinesque, 1815 (Mollusca, Gastropoda), ZooKeys 867, pp. 1-7 : 3

Neostromboidea new clade

Type.

The genus Strombus Linné, 1758.

Definition: The clade is nested within Stromboidea , with the characteristics outlined in the diagnosis, and contains taxa more closely related to Strombus pugilis Linné, 1758 ( Strombidae ) Terebellum terebellum ( Linné, 1758) ( Seraphsidae ) and Tibia fusus ( Linné,1758) ( Rostellariidae ) than Struthiolariidae Gabb, 1868 and Aporrhaidae Gray, 1850.

Diagnosis: The animal possesses eyes on the end of the peduncles. The cephalic tentacle is also located on the peduncle towards the distal end. The radula has a central rachidian tooth with three lateral teeth either side. The foot is laterally compressed, with a defined propodium and a metapodium. The shell form changes upon maturation with the development of an outer lip structure.

Remarks: Neostromboidea is well supported in previous revisions and studies on the phylogeny of Stromboidea (Figure 2 ; Latiolais et al. 2006; Simone 2005). Simone (2005) marked this clade as "node 9" and noted that it was monophyletic within the Stromboidea . Latiolais et al. (2006) used Aporrhaidae as the outgroup in their analysis, which demonstrated a significant genetic distance between the taxa Strombidae and Aporrhaidae . Neostromboidea brings a higher level of resolution to the nomenclature by restoring the cladistic understanding and evolutionary meaning that had been lost as a consequence of taxonomic inflation ( Abbott 1960; Simone 2005; MolluscaBase 2019).

Figures

Figure 2. The new phylogeny of Stromboidea A and alternatives found from previous revisions B molecular analysis after Latiolais et al. (2006: 440, fig. 2) C anatomical analysis after Simone 2005: 261, fig. 388 D cladogram based on the nomenclature after MolluscaBase (2019).