Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Gastropoda
Subclassis: Heterobranchia
Infraclassis: Euthyneura
Cohors: Tectipleura
Subcohors: Panpulmonata
Superordo: Eupulmonata
Ordo: Stylommatophora
Subordo: Helicina
Infraordo: Succineoidei
Superfamilia: Succineoidea
Familia: Succineidae
Subfamilia: Succineinae
Genus: Omalonyx
Species: O. convexus – O. geayi – O. pattersonae – †O. cocleare
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Name
Omalonyx d'Orbigny, 1837
Primary references
d'Orbigny 1837: Amér. Mérid. (Moll.), 229.
Omalonyx is a genus of air-breathing land snails, terrestrial pulmonate gastropod molluscs in the family Succineidae, the amber snails. These snails are amphibious, living very close to water and moving around both on emergent plants and also on submerged aquatic plants.[2]
Distribution
Species of the genus Omalonyx occur in the Caribbean Islands, and they are also amply distributed throughout South America.[2]
Species
Species within the genus Omalonyx include:
Omalonyx brasiliensis (Simroth, 1896)[2]
Omalonyx convexus (Heynemann, 1868)[2]
Omalonyx matheronii (Potiez & Michaud, 1835)[2] or[clarification needed] Omalonyx matheroni (Potiez & Michaud, 1838)[3]
Omalonyx pattersonae Tillier, 1981[2]
Omalonyx unguis (d'Orbigny, 1837)[2]
Omalonyx geayi Tillier, 1980[2]
Description
Omalonyx includes slugs with a reduced, flat and fingernail-like shell and a pattern of yellow coloring with two black longitudinal stripes and blackish stains throughout the entire body, including the mantle.[2] The mantle covers the visceral mass and the edge of the shell.[2] Various authors reported various extensions of the mantle: the mantle covers the shell in different extents.[2] The coloring was used to describe and characterize Omalonyx species, but Arruda & Thomé (2011) reported wide variability in color of Omalonyx convexus.[2]
Ecology
The species of Omalonyx are reported on macrophytes or emergent vegetation in the banks of lagoons, river floodplains, and streams.[2] Omalonyx convexus lives in both clean and polluted freshwater environments, as well as on natural and artificial substrates.[2]
These snails are herbivorous, feeding on living plant tissues.[2] Non-vegetal food items were also found in Omalonyx convexus.[2]
References
This article incorporates CC-BY-3.0 text from the reference[2]
d'Orbigny A. (1837). Amér. Mérid. (Moll.), page 229.
Arruda J. O. & Thomé J. W. (2011). "Biological aspects of Omalonyx convexus (Mollusca, Gastropoda, Succineidae) from the Rio Grande do Sul State, Brazil". Revista Biotemas 24(4): 95-101. doi:10.5007/2175-7925.2011v24n4p95
Robinson D. G., Hovestadt A., Fields A. & Breure A. S. H. (2009). "The land Mollusca of Dominica (Lesser Antilles), with notes on some enigmatic or rare species". Zoologische Mededelingen 83 http://www.zoologischemededelingen.nl/83/nr03/a13 Archived 2011-10-07 at the Wayback Machine
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