Article · Wikipedia archive · Last revised Jul 9, 2026

Antillorbis

Antillorbis is a genus of freshwater gastropods belonging to the family Planorbidae. This genus is distributed throughout the tropics and subtropics of the Americas.

Last revised
Jul 9, 2026
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Antillorbis
Antillorbis aeruginosus
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Superorder: Hygrophila
Family: Planorbidae
Subfamily: Planorbinae
Tribe: Drepanotrematini
Genus: Antillorbis
Harry & Hubendick, 19641

Antillorbis is a genus of freshwater gastropods belonging to the family Planorbidae.2 This genus is distributed throughout the tropics and subtropics of the Americas.2

Description

Antillorbis species are small, between 2.5–5 mm (0.098–0.197 in) in shell width. Both species have a slight sculpture consisting of fine, spiraling lines, though this is much more common in A. aeruginosus.3 The umbilicus is sunken, giving a concave appearance to the left and right side of the shell. The right side is less concave.45 Like the genus Drepanotrema, Antillorbis species have two flagella that attach to the base of the penis sheath.3

Differences Between Species3
A. aeruginosus A. nordestense
Sculpture More prominent Less prominent
Aperture Rounder Oval-shaped
Reproductive Tract Longer Shorter
Prostate Diverticules More Fewer

Distribution

Antillorbis species are native to the Americas. A. aeruginosus can be found in North and Central America, while A. nordestensis may be found in South America.2

Species

The species in this genus are as follows:12

References

References

  1. Auffenberg, Kurt (2022). "Antillorbis H. W. Harry & Hubendick, 1964". WoRMS. World Register of Marine Species. Retrieved 28 August 2025.
  2. "Antillorbis". Global Biodiversity Information Facility. Retrieved 2025-08-28.
  3. Pointier, J. P.; Escoubeyrou, K.; Bargues, B. D.; Mas-Coma, S. (2001). "Drepanotrema Nordestense (Lucena, 1953) (Pulmonata: Planorbidae): A New Record for the Bolivian Altiplano and ITS Differentiation by Morphology and Enzymes". Journal of Molluscan Studies. 67: 7–16. doi:10.1093/mollus/67.1.7.
  4. Pilsbry, H. A.; Ferriss, J. H. (1906). "MOLLUSCA OF THE SOUTHWESTERN STATES. II". Proceedings of the Academy of Natural Sciences of Philadelphia. 58: 165. ISSN 0097-3157. LCCN 12030019. OCLC 1382862.
  5. Paraense, W. L. (1975). "ESTADO ATUAL DA SISTEMÁTICA DOS PLANORBÍDEOS BRASILEIROS". Archivos do Museu Nacional do Rio de Janeiro (in Brazilian Portuguese). 55: 124. ISSN 0365-4508. LCCN 05017782. OCLC 1307697.