The fusiform shell is thin, smooth, or spirally sculptured. The axial sculpture is less conspicuous. The siphonal canal is nearly obsolete. The columella and outer lip is simple. The anal sulcus is wide, shallow and close to the suture. The animal is blind, with a distinct muzzle into which the proboscis is retracted. The operculum is wanting. Type: Pleurotomella castanea Dall, 1896 [2]
A new species described by Warén & Bouchet in 2009 under the name Phymorhynchus cingulata from methane seeps in deep water off the Congo River[21] is a secondary homonym. It will be newly described under different name in the future.
^Bouchet, P. (2010). Phymorhynchus cingulatus (Dall, 1890). In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=434618 on 2011-01-22
^Warén A. & Bouchet P. (2009). "New gastropods from deep-sea hydrocarbon seeps off West Africa". Deep-Sea Research Part II: Topical Studies in Oceanography56(23): 2326-2349. doi:10.1016/j.dsr2.2009.04.013
Dall W. H. (1908). "Reports on the Dredging Operations off the West Coast of Central America to the Galapagos to the West Coast of Mexico, and in the Gulf of California, in charge of Alexander Agassiz, carried on by the U. S. Fish Commission Steamer "Albatross", during 1891, Lieut. Commander Z. R. Tanner, U. S. N., Commanding, XXXVII and Reports on the Scientific Results of the Expedition to the Eastern Tropical Pacific, in charge of Alexander Agassiz, by the U. S. Fish Commission Steamer "Albatross," from October, 1904, to March, 1905, Lieut. Commander L. M. Garrett, U. S. N., Commanding. XIV. The Mollusca and the Brachiopoda". Bulletin of the Museum of Comparative Zoology at Harvard College43(6): 205-487 + plates. page 258
Warén A. & Bouchet P. (1993) New records, species, genera, and a new family of gastropods from hydrothermal vents and hydrocarbon seeps. Zoologica Scripta 22: 1-90.
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