Vol. 60, 2021
Revisiting a 135-year-old Taxonomic Account of the Freshwater Snail Semisulcospira multigranosa: Designating its Lectotype and Describing a New Species of the genus (Mollusca: Gastropoda: Semisulcospiridae)
Naoto Sawada1,2,* and Takafumi Nakano2
of Applied Biosciences, Graduate School of Agriculture, Kyoto
University, Kyoto 606-8502, Japan. *Correspondence: E-mail:
Received 2 September 2020 / Accepted 1 January 2021
The type series of Semisulcospira multigranosa
Boettger, 1886 was found in the Malacological Collection at the
Senckenberg Naturmuseum for the first time in ca. 135 years after its
original description. The syntypes consisted of 38 specimens, which
could be classified into four species. The examination of adult shell
morphology of these original materials revealed that the current
taxonomic account of S. multigranosa should be amended. Therefore, we designate a lectotype for S. multigranosa, and thus describe S. multigranosa auct. as Semisulcospira davisi sp. nov. Semisulcospira davisi
can be discriminated from the other congeners by the characteristics of
adult and embryonic shells, and radulae morphology. The present study
can resolve one of the fundamental taxonomic problems remaining with
the Semisulcospira snails.
Key words: Freshwater snail, Lake Biwa, Syntypes, Viviparous, Radula morphology.
Citation: Sawada N, Nakano T. 2021. Revisiting a 135-year-old taxonomic account of the freshwater snail Semisulcospira multigranosa: designating its lectotype and describing a new species of the genus (Mollusca: Gastropoda: Semisulcospiridae). Zool Stud 60:0j. doi:-.