MolluscaBase source details
Morse, E. S. (1920). On the occurrence of Pyramidula rupestris in Maine. The Nautilus. 34(2): 58-59.
350086
Morse, E. S.
1920
On the occurrence of <i>Pyramidula rupestris</i> in Maine.
The Nautilus
34(2): 58-59
Publication
Pyramidula rupestris var. nylanderi E. S. Morse, 1920 accepted as Planogyra asteriscus (E. S. Morse, 1857) (original description)
