Lobatus raninus
A robust Caribbean conch with a distinct stromboid notch.
Lobatus raninus, known as the hawk-wing conch, is a medium to large marine gastropod mollusk belonging to the family Strombidae, the true conchs. Its shell can reach a maximum recorded length of 121 mm, with some sources noting up to 130 mm. The shell is robust, heavy, and solid, featuring a distinct stromboid notch. The body whorl has coarse spiral ridges on its dorsal side. The flaring outer lip expands posteriorly but always remains lower than the spire. The shell is brownish with scattered white spots, while both the inner and outer lips are cream or white.
Phylogenetic studies have examined the relationships within Strombidae. In 2005, Simone proposed a cladogram based on morpho-anatomical analysis, placing L. raninus (then called Tricornis raninus) in the genus Tricornis, now considered a synonym of Lobatus. Simone argued that only Strombus gracilior, Strombus alatus, and Strombus pugilis remain in Strombus, based on five shared traits. Other former subgenera were elevated to genus level. A 2006 study by Latiolais et al., using nuclear histone H3 and mitochondrial COI gene sequences, analyzed 32 species formerly placed in Strombus and Lambis.
This species is found in the Caribbean Sea, the Gulf of Mexico, and the Lesser Antilles. It inhabits shallow waters near seagrass beds, at depths ranging from a minimum of 0.3 m to a maximum of 55 m. Like other Strombus species, L. raninus is herbivorous.
Quick Facts
- Genus
- Lobatus
- Species
- raninus
Facts from the source article.
Lore & Background
The shell of Lobatus raninus is robust, somewhat heavy and solid, with a distinct stromboid notch. The body whorl is dorsally ornamented by characteristic coarse spiral ridges, and the posterior expansion of the flaring outer lip is always lower than the spire. The color is brownish with several disperse white spots, while both inner and outer lips are cream or white. A drawing of the shell appears in Index Testarum Conchyliorum (1742).
Phylogenetic relationships among the Strombidae have been assessed using two methods. In one analysis, Simone proposed a cladogram based on morpho-anatomical study, placing L. raninus (there referred to as Tricornis raninus) in the genus Tricornis, now considered a synonym of Lobatus. In that analysis, only Strombus gracilior, Strombus alatus, and Strombus pugilis remained within Strombus, while other taxa previously considered subgenera were elevated to genus level. A different approach, based on sequences of nuclear histone H3 and mitochondrial cytochrome-c oxidase I genes, was proposed by Latiolais et al. (2006), analyzing 32 species that used to belong or still belong in the genera Strombus and Lambis.
Reader's Guide
Lobatus raninus is a herbivorous species that lives near seagrass beds, usually in shallow water, with a recorded depth range from 0.3 m to 55 m. Its robust shell, with coarse spiral ridges and a distinct stromboid notch, is characteristic of the true conchs. The species has been the subject of phylogenetic study, with its classification shifting between the genera Tricornis and Lobatus, reflecting ongoing debate about the relationships within Strombidae. The shell's brownish coloration with white spots and cream lips is a recognizable feature. The species is distributed across the Caribbean Sea, Gulf of Mexico, and Lesser Antilles, and its ecology as a herbivore in seagrass habitats is typical of many strombid snails. The maximum recorded shell length reaches up to 130 mm, making it a medium to large conch.
Did You Know?
- The maximum recorded shell length of Lobatus raninus is 121 mm or up to 130 mm.
- It lives near seagrass beds at depths from 0.3 m to 55 m.
- The species has been referred to as both Tricornis raninus and Lobatus raninus in phylogenetic studies.
- Its shell is brownish with disperse white spots and cream or white lips.
More in Marine Snails: Ceriths, Nassas and Conchs 1-24
Spotted an error? Know more?
Reader corrections go straight into our review queue. Suggest an edit · How this site is sourced