Concept

Lobatus raninus

Lobatus raninus, common name the hawk-wing conch, is a species of medium to large sea snail, a marine gastropod mollusk in the family Strombidae, the true conchs. The maximum recorded shell length is 121 mm or up to 130 mm. 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. The posterior expansion of the flaring outer lip is always lower than the spire. The color is brownish, with several disperse white spots. Both inner and outer lips are cream or white. The phylogenetic relationships among the Strombidae have been mainly accessed on two occasions, using two 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). 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). 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), in this case, only included T. raninus (now considered a synonym of Lobatus raninus). 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: This species is distributed in the Caribbean Sea, the Gulf of Mexico and the Lesser Antilles.

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Related concepts (8)
Strombus
Strombus is a genus of medium to large sea snails, marine gastropod molluscs in the family Strombidae, which comprises the true conchs and their immediate relatives. The genus Strombus was named by Swedish Naturalist Carl Linnaeus in 1758. Around 50 living species were recognized, which vary in size from fairly small to very large. Six species live in the greater Caribbean region, including the queen conch, Strombus gigas (now usually known as Eustrombus gigas or Lobatus gigas), and the West Indian fighting conch, Strombus pugilis.
Conomurex luhuanus
Conomurex luhuanus, commonly known as the strawberry conch or tiger conch, is a species of medium-sized sea snail, a marine gastropod mollusk in the family Strombidae, the true conchs. C. luhuanus is found in sandy habitat among corals in the Indopacific region. They feed on algae or detritus, move with a modified foot, and have complex eyes compared to other gastropods. The shell of C. luhuanus ranges from a more common length of 5 cm, to a maximum length of 8 cm. C.
Aliger gallus
Aliger gallus, previously known as Strombus gallus, common name the rooster conch or rooster-tail conch, is a species of medium-sized sea snail, a marine gastropod mollusk in the family Strombidae, the true conchs. This species is found from southeast Florida and Bermuda through the West Indies and south to Brazil. The average shell length of this species is about 12.5 cm. The maximum recorded shell length is 197 mm. The minimum recorded depth for this species is 0.3 m.; the maximum recorded depth is 82 m.
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