TL;DR: Some 92 terrestrial gastropods, representing 2 orders and 19 families, have been reported from Maine, and four of the snails and 11 of the slugs were introduced into Maine from Europe.
Abstract: Some 92 terrestrial gastropods, representing 2 orders and 19 families, have been reported from Maine. These animals consist of 76 species of snails (16 families) and 16 species of slugs (3 families). The taxonomic status of two of the snails is questionable. Twelve species and varieties of snails have their type localities in Maine. Four of the snails and 11 of the slugs were introduced into Maine from Europe. An additional 21 species are apparently native to both Maine and Europe. Sixty-three terrestrial gastropods have been collected in Cumberland County alone, followed by Aroostook County with 57 species. Four snails have been reported from all 16 of Maine's counties: Strobilops labyrinthicus, Discus whitneyi, Novisuccinea ovalis, and Zonitoides arboreus.
TL;DR: The first part of a formal taxonomic treatment of Sandelzhausen’s fossil pulmonates is presented, dealing with the superfamilies Ellobioidea, Pupilloidea and Clausilioidesa, and including the description of a new species.
Abstract: Sandelzhausen is an Early/Middle Miocene (Mammal Neogene zone MN5) fossil site near Mainburg, S Germany, that despite its small size harbors a rich fossil record. Thousands of fossil continental mollusks, almost exclusively pulmonate snails, were recovered during the excavations, but did not receive much attention from researchers. Here, the first part of a formal taxonomic treatment of Sandelzhausen’s fossil pulmonates is presented, dealing with the superfamilies Ellobioidea, Pupilloidea, and Clausilioidea, and including the description of a new species. The following species were found in the material: Carychium eumicron and Carychium galli sp. nov. (Ellobiidae); Granaria cf. grossecostata and Granaria sp. (Chondrinidae); Gastrocopta acuminata and Gastrocopta nouletiana (Gastrocoptidae); ?Pyramidula sp. (Pyramidulidae); Strobilops sp. (Strobilopsidae); Vallonia lepida (Valloniidae); Vertigo callosa (Vertiginidae); Pseudidyla moersingensis (Clausiliidae); Triptychia sp. (Filholiidae).
TL;DR: Analysis of ecological requirements of extant pupilloid snails, particularly of the taxa extinct in Europe and found in the Be3chatow mine, combined with palaeobotanical data, provide some palaeoecological and palaeoclimatic cues.
Abstract: Twenty five species of Pupilloidea of 10 genera have been found in the Miocene brown coal deposits of the open-cast mine Be3chatow. Four genera: Gastrocopta, Strobilops, Nesopupa and Negulus became extinct in Europe before the first major glaciation. Another one – Planogyra – is now represented by one extant species in southern Europe only. Three malacofauna-bearing horizons: Be3-C, Be3-B and Be3-A are correlated with biozones MN 4, MN 5 and MN 9, respectively. Analysis of ecological requirements of extant pupilloid snails, particularly of the taxa extinct in Europe and found in the Be3chatow mine, combined with palaeobotanical data, provide some palaeoecological and palaeoclimatic cues. Stratigraphic significance of some pupilloid species is discussed. A new combination, Nesopupa minor (Boettger, 1870), is proposed.