Alcadia hjalmarsoni is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae.[1]
| Alcadia hjalmarsoni | |
|---|---|
Scientific 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] | |
| |
Description
editThe 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
editThis species occurs in Puerto Rico.[1]
References
edit- ^ a b c Alcadia hjalmarsoni (L. Pfeiffer, 1856). 2 August 2024. Retrieved through: World Register of Marine Species.
- ^ Pfeiffer, L. (1856). "Diagnosen neuer Landschnecken". Malakozoologische Blätter. 3 (12): 43–48.
This article incorporates text from this source, which is in the public domain.
Further reading
edit- 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.
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