Freshly pressed: a paper by Salvador & Cavallari on this genus. Their abstract is as follows: “Herein, we present a taxonomic revision of the genus Polygyratia Gray, 1847, with a new systematic placement in Scolodontidae and containing only the species Polygyratia polygyrata (Born, 1778). We offer an updated morphological description and geographical distribution, based on museum specimens and occurrence data gathered from literature and online database iNaturalist. We synonymise P. charybdis Mörch, 1852 with P. polygyrata. The species is known only from Atlantic Forest areas in Bahia state, eastern Brazil. We exclude three other species from the genus Polygyratia, classifying them as: Systrophia (Systrophia) heligmoida (d’Orbigny, 1835) and S. (Entodina) reyrei (Souverbie, 1858), based on conchological features; and S. (E.) pollodonta (d’Orbigny, 1835), though tentatively, based on scant published data. Finally, we present the first report of S. (S.) heligmoida (d’Orbigny, 1835) from Brazil“.
It is good to have this revision of Polygyratia, with its new classification to the Scolodontidae. Personally I would like to see additional research, anatomical and molecular, on the 3 species which are now (tentatively) classified by these authors in Systrophia.
Salvador, R.B. & Cavallari, D.C., 2020. Taxonomy and distribution of enigmatic ‘helicoid’ Polygyratia Gray, 1847 (Gastropoda, Stylommatophora). – Zoosystema and Evolution, 96(1): 91-101.