Phylogenetic analysis of the Lancinae (Gastropoda, Lymnaeidae) with a description of the U.S. federally endangered Banbury Springs lanx

Abstract

We examined the patelliform snails of the subfamily Lancinae, endemic to northwestern North America, to test whether morphological variation correlated with genetic and anatomical differences. Molecular analyses using cox1, 16S, calmodulin intron, and 28S rDNA partial sequences and anatomical data supported recognition of four species in three genera. The relationships of lancines within Lymnaeidae are not yet well-resolved. The federally endangered Banbury Springs lanx is described as a new genus and species, Idaholanx fresti, confirming its distinctiveness and narrow endemicity.

Species Richness, Molecular Taxonomy and Biogeography of the Radicine Pond Snails (Gastropoda: Lymnaeidae) in the Old World

“…The pond snails (Lymnaeidae Rafinesque, 1815) represent one of the most diverse and practically important families of freshwater snails, almost cosmopolitan in its distribution 1 – 3 . Though there is no a commonly accepted system of the family at the subgeneric and generic levels 4 , most workers agree that the taxonomic structure of the Lymnaeidae is rather complicated, with several subfamilies, genera, and subgenera within it 2 , 4 – 9 . Some authors prefer to deal with informal taxonomic groups within this family, each of them to cover morphologically and phylogenetically similar groups of taxa.…”

Freshwater micro-gastropods from the Iguaçu National Park, Brazil: two new truncatelloid caenogastropods and anatomy of Chilina megastoma Hylton Scott, 1958

“…The chilinids differ from the planorbids (e.g., PaRaenSe & deSLandeS 1955a, b, PaRaenSe 1981, 1996, 2002, Sideman et al 1985, ibiKounLé et al 2008, Simone et al 2012 in the lack of seminal vesicle located along the hermaphrodite duct, and of digitiform prostate, in having a much elongated bursa copulatrix, and the single penial muscle. They differ from the lymnaeids (e.g., PaRaenSe 1982, 1984, 1995, camPbeLL et al 2017 in having much more elongated genital ducts, in lacking seminal vesicle along the hermaphrodite duct, in lacking nidamental gland, and in the prostate located along the spermoviduct. In contrast to the physids (e.g., PaRaenSe 1986, 1987, PaRaenSe & PontieR 2003, tayLoR 2003, the chilinids lack seminal vesicles along the hermaphrodite duct, or digitiform prostate, and they have a less complex posterior region of the penis.…”

A New Species of Uncancylus Pilsbry, 1913 (Gastropoda: Hygrophila: Planorboidea: Ancylinae), from South America and Reassessment of the Status of U. bonariensis Strobel, 1874

“…DNA extraction of four specimens of Uncancylus bonariensis from Argentina was carried out using phenol-chloroform protocol (Sambrook et al, 2001). The material was digested in CTAB overnight at 37°C, followed by chloroform-isoamyl alcohol separation, isopropanol precipitation, and washing with 70% ethanol before drying and dissolving in TE (Campbell et al, 2005). For the other six specimens ( Uncancylus concentricus from Uruguay and U. paulistanus n. sp.…”