Biology:Gulickia
Gulickia is a monotypic genus of land snails in the family Achatinellidae.[1]
Its sole species, Gulickia alexandri, is a critically endangered species endemic to the island of Maui in Hawaii.[2]
Description of Gulickia alexandri
The shell measures 3.5 mm in length and 1.7 mm in diameter, with the axis of the aperture reaching 1.3 mm. The parietal lamella stands 0.22 mm in height. The shell is sinistral and minutely perforate, characterized by an acutely conical, turreted form. It is composed of a thin, corneous, and subdiaphanous material that possesses a shining luster. The surface is nearly smooth, though it is marked by minute striae following the lines of growth. The spire is conical, terminating in a somewhat obtuse apex, while the whorls of the protoconch exhibit a very fine spiral striation. The suture is simple and only slightly impressed. The 6 3/4 whorls are slightly convex and increase slowly in size; they appear somewhat compressed, with the upper whorls being convex and the body whorl becoming more rotund. This body whorl is slightly angular at its commencement but remains convex at the base. The aperture is somewhat oblique and ovate in shape. Within, the parietal lamella is quite strong, very oblique, and arcuate, featuring a minutely and irregularly serrate edge. The columella is nearly straight—though it appears slightly sigmoid in immature specimens—and narrowly triangular, equipped with two well-developed, oblique lamellae. The peristome is simple, thin, and unexpanded, while the outer margin is gracefully arcuate. [3]
Distribution
This species occurs off Maui island, Hawaii.
References
- ↑ "Gulickia C. M. Cooke, 1915". MolluscaBase. World Register of Marine Species. http://www.marinespecies.org/aphia.php?p=taxdetails&id=995583.
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedNS - ↑ Pilsbry, H. A. & Cooke, C. M. (1914–1916). Manual of conchology, structural and systematic, with illustrations of the species. Ser. 2, Pulmonata. Vol. 23: Appendix to Amastridae, Tornatellinidae, Index to vols. XXI-XXIII. pp. i-xi, 1-302, pls 1-55.. Philadelphia: Conchological Department, Academy of Natural Sciences. p. 112. https://biodiversitylibrary.org/page/1296750. Retrieved 29 April 2026.
This article incorporates text from a publication now in the public domain:
- Cowie, R. H., Evenhuis, N. L. & Christensen, C. C. (1995). Catalog of the native land and freshwater molluscs of the Hawaiian Islands. vi + 248 pp. Leiden: Backhuys Publishers.
External links
- Cooke, C. M. & Kondo, Y. (1961). "Revision of Tornatellinidae and Achatinellidae (Gastropoda, Pulmonata).". Bernice P. Bishop Museum Bulletin 221: 1–303. http://hbs.bishopmuseum.org/pubs-online/pdf/bull221.pdf.
- Academy of Natural Sciences of Philadelphia: images
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