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Dog-head Triton

Dog-head Triton
Cymatium (Ranularia) cynocephalum (Lamarck, 1816)
Family Cymatiidae


Te Dog-head triton is fairly rare on S. Hutchinson Island. It's also know as Ranularia cynocephala.
 


Dog-head Triton (S. Hutchinson Island, November, 2020)

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Dog-head Triton

Shell size to 65 mm; very distinctive shell with solid, globular last whorl, square whorl shoulders, and relatively long siphonal canal. Usually with only one varix other than the thickened lip. Well-preserved shells have the outer lip and parietal wall (region opposite the outer lip) colored peach. Parietal wall with a dark-brown spot. The shell in the main picture was found in October 2016 by Gary Tucker on 0.5 m water on the eastern end of Sanibel. The supplementary image is of a shell found in February 2014 by Jeanne Risher on Kice Island. There are other records from Sanibel.
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Ranularia cynocephala
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Ranularia cynocephala
Ranularia cyanocephalum.jpg
Apertural view of a shell of Ranularia cynocephala (Lamarck, 1816)
Scientific classification edit
Kingdom:     Animalia
Phylum:     Mollusca
Class:     Gastropoda
Subclass:     Caenogastropoda
Order:     Littorinimorpha
Family:     Cymatiidae
Genus:     Ranularia
Species:     R. cynocephala
Binomial name
Ranularia cynocephala
(Lamarck, 1816)
Synonyms[1]

    Cymatium (Ranularia) caribbaeum Clench & Turner, 1957
    Cymatium (Ranularia) sarcostumum Clench & Turner 1957
    Cymatium cynocephalum (Lamarck, 1816)
    Cymatium moritinctum (Reeve, 1844)
    Eutritonium moritinctum Reeve
    Triton cynocephalum Lamarck, 1816
    Triton moritinctus Reeve, 1844

Ranularia cynocephala is a species of predatory sea snail, a marine gastropod mollusk in the family Cymatiidae.[1]
Description

The maximum recorded shell length is 84 mm.[2]
Habitat and distribution

The minimum recorded depth for this species is 0 m; the maximum recorded depth is 137 m.[2]
References

Ranularia cynocephala (Lamarck, 1816). Retrieved through: World Register of Marine Species on 6 December 2018.

    Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. doi:10.1371/journal.pone.0008776.