1. Shell description

2. Phylogeny

3. Distribution

4. Ecology

5. References

• Strombus bituberculatus Lamarck, 1822
• Strombus costosomuricatus Mörch, 1852
• Strombus fetus Jung & Heitz, 2001
• Strombus lobatus Swainson, 1823
• Strombus praeraninus Kronenberg & Dekker, 2000 (Unnecessary new name for S. wilsonorum Petuch, 1994)
• Strombus quadratus Perry, 1811
• Strombus raninus Gmelin, 1791 (basionym)
• Strombus raninus nanus Bales, 1942
• Strombus sulcatus Fischer von Waldheim, 1807
• Strombus wilsonorum Petuch, 1994 †
• Tricornis raninus (Gmelin, 1791)

Shell description

The maximum recorded shell length is 121 mm^[2] or up to 130 mm.^[3] Like other species in the same genus, Lobatus raninus has a robust, somewhat heavy and solid shell, with a distinct stromboid notch. The body whorl is dorsally ornamented by characteristic coarse spiral ridges.^[3] The posterior expansion of the flaring outer lip is always lower than the spire.^[3] The color is brownish, with several disperse white spots. Both inner and outer lips are cream or white.^[3]

Phylogeny

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The phylogenetic relationships among the Strombidae have been mainly accessed in two different occasions, using two distinct methods. In 2005, Simone proposed a cladogram (a tree of descent) based on an extensive morpho-anatomical analysis of representatives of Aporrhaidae, Strombidae, Xenophoridae and Struthiolariidae, including L. raninus (there referred to as Tricornis raninus).^[4]

With the exception of Lambis and Terebellum, the remaining taxa were previously allocated within the genus Strombus. However, according to Simone, only Strombus gracilior, Strombus alatus and Strombus pugilis, the type species, remained within Strombus, as they constituted a distinct group based on at least five synapomorphies (traits that are shared by two or more taxa and their most recent common ancestor).^[4] The remaining taxa were previously considered as subgenera, and were elevated to genus level by Simone in the end of his analysis. The genus Tricornis (now considered a synonym of Lobatus),^[1] in this case, only included T. raninus (now considered a synonym of Lobatus raninus).^[1][4]

A different approach, this time based on sequences of nuclear histone H3 and mitochondrial cytochrome-c oxidase I (COI) genes was proposed by Latiolais et al. (2006). The phylogenic relations of (32 analyzed) species that used to belong or still belong in the genus Strombus and Lambis are shown below:^[5]

Distribution

This species is distributed in the Caribbean Sea, the Gulf of Mexico and the Lesser Antilles.

Ecology

Habitat

Feeding

Like other species of the genus Strombus, S. raninus is known to be a herbivore.

References

• Rosenberg, G., F. Moretzsohn, and E. F. García. 2009. Gastropoda (Mollusca) of the Gulf of Mexico, Pp. 579–699 in Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas

• Adenanthos barbigera
• Adenanthos barbigerus
• Adenanthos cacomorpha
• Adenanthos cacomorphus
• Adenanthos cuneata
• Adenanthos cuneatus
• Adenanthos cunninghamii
• Adenanthos detmoldii
• Adenanthos dobagii
• Adenanthos eyrei
• Adenanthos filifolius
• Adenanthos glabrescens
• Adenanthos ileticos
• Adenanthos intermedia
• Adenanthos intermedius
• Adenanthos labillardierei
• Adenanthos macropodiana
• Adenanthos macropodianus
• Adenanthos meisneri
• Adenanthos obovata
• Adenanthos obovatus
• Adenanthos oreophilus
• Adenanthos pamela
• Adenanthos pungens
• Adenanthos sect. Adenanthos