Gulella bicolor
{{Short description|Species of gastropod}}
{{Italic title}}
{{Taxobox
| name = Gulella bicolor
| image = Huttonella bicolor shell.png
| status =
| status_system =
| status_ref =
| regnum = Animalia
| phylum = Mollusca
| classis = Gastropoda
| unranked_superfamilia = clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
informal group Sigmurethra
| superfamilia = Streptaxoidea
| familia = Streptaxidae
| subfamilia = Ptychotrematinae
| genus = Gulella
| species = G. bicolor
| binomial = Gulella bicolor
| binomial_authority = (Hutton, 1834)Hutton T. (1834). On the land shells of India. Journal of the Asiatic Society of Bengal Calcutta 3(26): 86 (description); 93 (name).
| synonyms =
- Carychium gigas A. Férussac, 1827 (nomen oblitum)
- Diaphora bicolor (T. Hutton, 1834) superseded combination
- Ennea (Huttonella) bicolor (T. Hutton, 1834) superseded combination
- Ennea bicolor (T. Hutton, 1834) superseded combination
- Ennea ceylanica L. Pfeiffer, 1855 junior subjective synonym
- Gulella (Huttonella) bicolor (T. Hutton, 1834) alternative representation
- Huttonella bicolor (T. Hutton, 1834) superseded combination
- Indoennea bicolor (T. Hutton, 1834) superseded combination
- Pupa (Ennea) ceylanica (L. Pfeiffer, 1855) junior subjective synonym
- Pupa bicolor T. Hutton, 1834 (original combination)
- Pupa cafaeicola Craven, 1880
- Pupa largillierti R. A. Philippi, 1844 junior subjective synonym
- Pupa mellita A. Gould, 1846
}}
Gulella bicolor is a species of land snail in the family Streptaxidae known commonly as the two-toned gulella.{{WRMS species|875235|Gulella bicolor(T. Hutton, 1834)|16 June 2025}}
Description
The snail has an elongated shell up to 7.5 millimeters long by 2 millimeters wide. In life the shell is orange because the orange color of the body shows through; empty shells are white or pale brown. The shell is smooth with slight ribs at the sutures and larger ribs at the aperture. The aperture also has four teeth.
Distribution
The original native range of the snail is unclear, but it may have come from Asia or southern Africa. Today it has a broader distribution, having been widely introduced to other regions. It is known in the Caribbean, the southeastern United States, Central and South America, some Pacific Islands, and the Northern Territory in Australia.
Recent records include:
- Dominica, first reported in 2009.Robinson D. G., et al. (July 2009). [http://dpc.uba.uva.nl/cgi/t/text/text-idx?c=zoomed;cc=zoomed;rgn=main;view=text;idno=m8303a13 The land Mollusca of Dominica (Lesser Antilles), with notes on some enigmatic or rare species.] Zoologische Mededelingen, 83.
- Brazil, first reported in 2008.dos Santos, S. B., et al. (2008). [http://revistaseletronicas.pucrs.br/ojs/index.php/fabio/article/viewFile/222/4720 First record of the micro-predator Huttonella bicolor (Hutton, 1834) (Gastropoda, Streptaxidae) on Rio de Janeiro City, Brazil.] Biociências 16(2), 145-48.
- Nicaragua{{in lang|es}} Pérez, A. M., et al. (2008). [http://www.scielo.sa.cr/scielo.php?pid=S0034-77442008000100023&script=sci_arttext Diversidad de moluscos gasterópodos terrestres en la región del Pacífico de Nicaragua y sus preferencias de hábitat.] Rev. Biol. Trop. 56(1), 317-32.
- AustraliaSanisic, J. (1981). [http://www.tandfonline.com/doi/abs/10.1080/00852988.1981.10673939#preview The carnivorous land snail Gulella (Huttonella) bicolor (Hutton, 1834) in Australia. (Pulmonata: Streptaxidae).] Journal of the Malacological Society of Australia 5, 84-86.
- The Seychelles, introduced in the mid-19th century and first recorded in 1867.Gerlach, J. and A. C. van Bruggen. (1999). [https://www.europeana.eu/portal/record/08703/B89697D56FFD653E286775292DD35BF196018014.html Streptaxidae Mollusca: Gastropoda: Pulmonata) of the Seychelles Islands, western Indian Ocean.] Zoologische Verhandelingen 328, 1-60.
- Mascarenes
Ecology
This carnivorous snail eats other snails, such as Subulina octona and species of the family Pupillidae.
References
{{Reflist}}
Further reading
{{Commons category}}
- Naggs, F. (1989). [http://www.conchsoc.org/node/4984 Gulella bicolor (Hutton) and its implications for the taxonomy of streptaxids.] Journal of Conchology 33, 165–68.
- Stoliczka, F. (1871). [https://archive.today/20130918030124/http://malaypeninsularsnail.lifedesks.org/node/661 Notes on terrestrial Mollusca from the neighbourhood of Moulmein, with descriptions of new species.] J. Asiat. Soc. Beng. 40, 143–77.
{{Taxonbar|from=Q3076170}}
{{DEFAULTSORT:Huttonella Bicolor}}