Haplotrema duranti ssp. continentis

Haplotrema duranti continentis

Description 5

Unfortunately there isn't too much info about this species, and it's hard to tell if it's even still current. However, Roth & Sadeghian list it for SF county, and there are images available online, as well as the descriptions in Pilsbry and Baker 1930. They both seem to separate it from H. minimum, the only other Haplotrema in SF, based on the small size of H. duranti (5-8 mm) vs. H. miniumum (14-22 mm). I'm not entirely sure yet how that rules out juvenile H. miniumum, though Pilsbry also mentions that H. miniumum is "irregularly wrinkle-striate, covered with close, microscopic shallow spiral striae," while of H. duranti he writes, "Whorls somewhat convex, the first two smooth, the rest distinctly striate."

Image Usage 5

These images were downloaded from the Academy of Natural Sciences of Drexel University Malacology Collection website (http://clade.ansp.org/malacology/collections/search.php?catalog=152672&submitbut=Search), which states, "These may be used free of charge for purposes of research or non-commercial publication, such as in scientific journals." I assume that it's ok to use them here, but if you think otherwise, please get in touch.

Sources and Credits

  1. (c) Academy of Natural Sciences of Drexel University, some rights reserved (CC BY), uploaded by Ken-ichi Ueda, http://www.inaturalist.org/photos/1475863
  2. (c) Academy of Natural Sciences of Drexel University, some rights reserved (CC BY), uploaded by Ken-ichi Ueda, http://www.inaturalist.org/photos/1475872
  3. (c) Academy of Natural Sciences of Drexel University, some rights reserved (CC BY), uploaded by Ken-ichi Ueda, http://www.inaturalist.org/photos/1475873
  4. (c) Neil Fahy, some rights reserved (CC BY), uploaded by Ken-ichi Ueda, http://www.inaturalist.org/photos/1778422
  5. (c) Ken-ichi Ueda, some rights reserved (CC BY-SA)

More Info

iNat Map

Establishment native
Slug or snail snail