Pyrgulopsis

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Genus of gastropods

title: "Pyrgulopsis" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["pyrgulopsis", "hydrobiidae", "gastropod-genera", "taxonomy-articles-created-by-polbot"] description: "Genus of gastropods" topic_path: "general/pyrgulopsis" source: "https://en.wikipedia.org/wiki/Pyrgulopsis" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of gastropods ::

| image = Pyrgulopsis nevadensis shell.jpg | image_caption = Apertural view of a shell of †Pyrgulopsis nevadensis. | taxon = Pyrgulopsis | authority = Call & Pilsbry, 1886 | diversity_link = | diversity_ref = | diversity = 133 species

Pyrgulopsis is a genus of freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae.

Etymology

The name Pyrgulopsis is composed from Pyrgula, another genus of snail, and opsis = aspect of.

Description

Generic characters of the genus Pyrgulopsis are: the shell is minute, conically turreted, somewhat elongated, imperforate and unicarinate. The apex is acute. The aperture is ovate. The edge of the aperture, called the peritreme, is continuous. The operculum is ovate, thin, corneous and spiral, with polar point well forward and approximating the columella.

The jaw is thin and membranaceous. The radula is odontophore, with teeth are arranged in transverse rows, according to the formula 3 + 1 + 3. Formula for denticles of rhachidian: .

Distribution

The distribution of the genus Pyrgulopsis includes Western and South-western United States. Snails of species in the genus Pyrgulopsis occur in fresh water and in brackish water.

Species

::figure[src="https://upload.wikimedia.org/wikipedia/commons/9/90/Pyrgulopsis_deserta_shell.jpg" caption="Shells]] of ''[[Pyrgulopsis deserta]]''."] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/7/7a/Pyrgulopsis_neomexicana_shell.jpg" caption="A shell of ''[[Pyrgulopsis neomexicana]]''."] ::

Pyrgulopsis is the largest genus of freshwater gastropods in the North America. In 2014, 139 species were recognized in this genus.

Species in the genus Pyrgulopsis include:

Eastern North American species of Pyrgulopsis are considered to be in separate genus Marstonia according to the Thompson and Hershler (2002).

References

This article incorporates public domain text from the reference.

References

  1. [[Richard Ellsworth Call. Call R. E.]] & [[Henry Augustus Pilsbry. Pilsbry H. A.]] (1886). "On ''Pyrgulopsis'', a new genus of rissoid mollusk, with description of two new forms". [https://archive.org/details/proceedingsofdav05dave ''Proceeding Davenport Academy of Natural Sciences'' '''V.''']: [https://archive.org/stream/proceedingsofdav05dave#page/8/mode/2up 9]-14.
  2. (July 2014). "Taxonomic revision of the ''Pyrgulopsis gilae'' (Caenogastropoda, Hydrobiidae) species complex, with descriptions of two new species from the Gila River basin, New Mexico". ZooKeys.
  3. [https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=70658 ''Pyrgulopsis''], Integrated Taxonomic Information System, accessed 24 July 2009.
  4. "Pyrgulopsis anguina". Utah Division of Wildlife Resources.
  5. (May 2020). "First record for springsnails (Mollusca: Hydrobiidae: ''Pyrgulopsis'') from the northern Rocky Mountains". [[Proceedings of the Biological Society of Washington]].
  6. (November 2008). "A second species of Pyrgulopsis (Hydrobiidae) from the Missouri River basin, with molecular evidence supporting faunal origin through Pliocene stream capture across the northern continental divide". Journal of Molluscan Studies.
  7. Hershler R. Liu H.-P. (25 January 2010). "Two new, possibly threatened species of ''Pyrgulopsis'' (Gastropoda: Hydrobiidae) from southwestern California". ''Zootaxa'' '''2343''': 1–17, 8 plates. [http://www.mapress.com/zootaxa/2010/f/z02343p017f.pdf preview]
  8. "Pyrgulopsis chamberlini". Utah Division of Wildlife Resources.
  9. (1998). "A systematic review of the hydrobiid snails (Gastropoda: Rissooidea) of the Great Basin, western United States. Part I. Genus ''Pyrgulopsis''". California Malacozoological Society, Inc..
  10. "Spring Mountains Pyrg".
  11. "Pyrgulopsis fusca". Utah Division of Wildlife Resources.
  12. "Pyrgulopsis hamlinensis". Utah Division of Wildlife Resources.
  13. (9 September 2013). "Systematics of a widely distributed western North American springsnail, Pyrgulopsis micrococcus (Caenogastropoda, Hydrobiidae), with descriptions of three new congeners". ZooKeys.
  14. "Pyrgulopsis nonaria". Utah Division of Wildlife Resources.
  15. "Pyrgulopsis saxatilis". Utah Division of Wildlife Resources.
  16. (2010). "Transfer of ''Cochliopa texana'' to ''Pyrgulopsis'' (Hydrobiidae) and description of a third congener from the lower Pecos River basin". Journal of Molluscan Studies.
  17. "Pyrgulopsis transversa". Utah Division of Wildlife Resources.
  18. "Southeast Nevada Pyrg".
  19. "Pyrgulopsis variegata". Utah Division of Wildlife Resources.
  20. (1994). "A review of the North American freshwater snail genus ''Pyrgulopsis'' (Hydrobiidae)". [[Smithsonian Contributions to Zoology]].
  21. ''Marstonia'' http://www.natureserve.org accessed 25 July 2009. (See "Concept References" in each ''Marstonia'' species.)

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