Snails in depth: integrative taxonomy of Famelica, Glaciotomella and Rimosodaphnella (Conoidea: Raphitomidae) from the deep sea of temperate Australia
Francesco Criscione
A D , Anders Hallan A , Nicolas Puillandre B and Alexander Fedosov C
+ Author Affiliations
- Author Affiliations
A Australian Museum Research Institute, 1 William Street, Sydney, NSW 2010, Australia.
B Institut Systématique Evolution Biodiversité (ISYEB), Muséum National d’Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles. 57 rue Cuvier, CP 26, F-75005 Paris, France.
C A.N. Severtsov Institute of Ecology and Evolution of Russian Academy of Sciences, Leninski Prospect 33, RU-119071 Moscow, Russia.
D Corresponding author. Email: francesco.criscione@austmus.gov.au
Invertebrate Systematics 35(8) 940-962 https://doi.org/10.1071/IS21008
Submitted: 9 February 2021 Accepted: 28 June 2021 Published: 5 November 2021
Abstract
The deep sea of temperate south-eastern Australia appears to be a ‘hotspot’ for diversity and endemism of conoidean neogastropods of the family Raphitomidae. Following a series of expeditions in the region, a considerable amount of relevant DNA-suitable material has become available. A molecular phylogeny based on this material has facilitated the identification of diagnostic morphological characters, allowing the circumscription of monophyletic genera and the introduction of several new genus-level taxa. Both named and new genera are presently being investigated through integrative taxonomy, with the discovery of a significant number of undescribed species. As part of this ongoing investigation, our study focuses on the genera Famelica Bouchet & Warén, 1980, Glaciotomella Criscione, Hallan, Fedosov & Puillandre, 2020 and Rimosodaphnella Cossmann, 1914. We subjected a comprehensive mitochondrial DNA dataset of representative deep-sea raphitomids to the species delimitation methods ABGD and ASAP that recognised 18 and 15 primary species hypotheses (PSHs) respectively. Following additional evaluation of shell and radular features, and examination of geographic and bathymetric ranges, nine of these PSHs were converted to secondary species hypotheses (SSHs). Four SSHs (two in Famelica and two in Rimosodaphnella) were recognised as new, and formal descriptions are provided herein.
Keywords: shell, radula, deep sea, mtDNA, species delimitation, biodiversity
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