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Alcadia hjalmarsoni

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Alcadia hjalmarsoni
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Neritimorpha
Order: Cycloneritida
Family: Helicinidae
Genus: Alcadia
Species:
A. hjalmarsoni
Binomial name
Alcadia hjalmarsoni
(L. Pfeiffer, 1856)
Synonyms[1]
  • Helicina hjalmarsoni L. Pfeiffer, 1856

Alcadia hjalmarsoni is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae.[1]

Description

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The height of the shell attains 5 mm, its greatest diameter 8 mm.

(Original description in Latin) The conoid-depressed shell is somewhat solid, smooth and slightly shiny. It is tawny with a purplish tint near the suture and aperture. The spire is convex and somewhat pointed. There are 4 whorls, which are somewhat flat and gradually increase in size. The body whorl is depressingly rounded with an arched fissure near the columella. The aperture is nearly diagonal and somewhat semi-oval. The columella descends at a right angle from the base, is slightly twisted, and scarcely recedes, emitting a thin, defined callus. The peristome is obtuse and yellow-bordered, with the right margin slightly curved forward. The operculum is thin and tawny.[2]

Distribution

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This species occurs in Puerto Rico.[1]

References

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  1. ^ a b c Alcadia hjalmarsoni (L. Pfeiffer, 1856). 2 August 2024. Retrieved through: World Register of Marine Species.
  2. ^ Pfeiffer, L. (1856). "Diagnosen neuer Landschnecken". Malakozoologische Blätter. 3 (12): 43–48. Public Domain This article incorporates text from this source, which is in the public domain.

Further reading

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  • Richling, I.; Glaubrecht, M. (2008). "The types of Neotropical Helicinidae (Mollusca, Gastropoda, Neritopsina) in the Malacological Collection of the Museum für Naturkunde Berlin: an annotated catalogue, with emphasis on Cuban land snails". Zoosystematics and Evolution. 84 (2): 265–310.
  • van der Schalie, H. (1948). The land and fresh-water mollusks of Puerto Rico. Ann Arbor: Museum of Zoology, University of Michigan, Miscellaneous Publications. no. 70.