MolluscaBase taxon details
original description
(of Helix asteriscus E. S. Morse, 1857) Morse, E. S. (1857). <i>Helix asteriscus</i>. <em>Proceedings of the Boston Society of Natural History.</em> 6: 128., available online at https://www.biodiversitylibrary.org/page/9493308
page(s): 128 [details]
original description
(of Pyramidula rupestris var. nylanderi E. S. Morse, 1920) Morse, E. S. (1920). On the occurrence of <i>Pyramidula rupestris</i> in Maine. <em>The Nautilus.</em> 34(2): 58-59., available online at https://www.biodiversitylibrary.org/page/1732971
page(s): 59, fig. 1 [details]
additional source
Schileyko, A. A. (1998). Treatise on Recent terrestrial pulmonate molluscs. Part 1. Achatinellidae, Amastridae, Orculidae, Strobilopsidae, Spelaeodiscidae, Valloniidae, Cochlicopidae, Pupillidae, Chondrinidae, Pyramidulidae. <em>Ruthenica.</em> Supplement 2: 1-127. Moskva [April].
page(s): fig. 113 [details] Available for editors [request]
additional source
Sysoev, A. V. & Schileyko, A. A. (2009). Land snails and slugs of Russia and adjacent countries. <em>Sofia/Moskva (Pensoft).</em> 312 pp., 142 plates. [June] [= Pensoft Series Faunistica No 87].
page(s): 38, Fig. 13E [details] Available for editors [request]
additional source
Baker, H. B. (1928). <i>Planogyra asteriscus</i> (Morse). <em>The Nautilus.</em> 41(4): 122-123., available online at https://www.biodiversitylibrary.org/page/8519853 [details]