The length of the shell attains 28 mm, the diameter 11.5 mm.
(Original description) The fusiform shell is white, with an olive-gray more or less dehiscent dull periostracum. The nucleus is eroded. There are about seven subsequent whorls. The spire without the nucleus is about equal in length to the aperture. The suture is appressed. A little in front of it is the anal fasciole, which is narrow, slightly constricted, and ill-defined. In front of it and forming the shoulder of the whorl is a series of about twelve round-topped, slightly protractive, wavelike axial ribs, which only reach the suture in front of them in the earlier whorls, falling short of it in the later ones. Other axial sculpture consists of rather irregular, more or less prominent incremental lines. The spiral sculpture consists of three or more somewhat obscure incised lines over the fasciole. On the basal side of the whorl are numerous rather distant, distinct spiral striae, subequal and nearly equidistant, the interspaces a little elevated and, on the canal, becoming threads. In addition to these there are on the middle of the whorls a quantity of irregular, oblique, somewhat vermicular, short incised lines, the interspaces between which are faintly beaded or reticulated by the short segments they intercept of the incremental lines. Traces of analogous sculpture can be observed with a lens also on the base. The aperture is semilunar. The outer lip is thin, sharp, with a shallow anal sulcus adjacent to the suture. The body with the sculpture erased, is white and polished. The white columella is solid, twisted, obliquely truncate in front. The siphonal canal is wide, short, recurved and flaring anteriorly. The operculum is rounded, triangular with an apical nucleus, pale brownish.[2]
^W.H. Dall (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. L. Tanner, U. S. N., Commanding. XXX VII. 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 v. 43 p. 269 (1904)
External linksedit
Wikimedia Commons has media related to Borsonella erosina.
"Borsonella (Borsonellopsis) erosina". Gastropods.com. Retrieved 15 January 2019.
This Borsoniidae-related article is a stub. You can help Wikipedia by expanding it.
borsonella, erosina, species, snail, marine, gastropod, mollusk, family, borsoniidae, shell, holotype, smithsonian, institution, scientific, classificationdomain, eukaryotakingdom, animaliaphylum, molluscaclass, gastropodasubclass, caenogastropodaorder, neogas. Borsonella erosina is a species of sea snail a marine gastropod mollusk in the family Borsoniidae 1 Borsonella erosinaShell of Borsonella erosina holotype at the Smithsonian Institution Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum MolluscaClass GastropodaSubclass CaenogastropodaOrder NeogastropodaSuperfamily ConoideaFamily BorsoniidaeGenus BorsonellaSpecies B erosinaBinomial nameBorsonella erosina Dall 1908 Synonyms 1 Leucosyrinx erosina Dall 1908 Contents 1 Description 2 Distribution 3 References 4 External linksDescription editThe length of the shell attains 28 mm the diameter 11 5 mm Original description The fusiform shell is white with an olive gray more or less dehiscent dull periostracum The nucleus is eroded There are about seven subsequent whorls The spire without the nucleus is about equal in length to the aperture The suture is appressed A little in front of it is the anal fasciole which is narrow slightly constricted and ill defined In front of it and forming the shoulder of the whorl is a series of about twelve round topped slightly protractive wavelike axial ribs which only reach the suture in front of them in the earlier whorls falling short of it in the later ones Other axial sculpture consists of rather irregular more or less prominent incremental lines The spiral sculpture consists of three or more somewhat obscure incised lines over the fasciole On the basal side of the whorl are numerous rather distant distinct spiral striae subequal and nearly equidistant the interspaces a little elevated and on the canal becoming threads In addition to these there are on the middle of the whorls a quantity of irregular oblique somewhat vermicular short incised lines the interspaces between which are faintly beaded or reticulated by the short segments they intercept of the incremental lines Traces of analogous sculpture can be observed with a lens also on the base The aperture is semilunar The outer lip is thin sharp with a shallow anal sulcus adjacent to the suture The body with the sculpture erased is white and polished The white columella is solid twisted obliquely truncate in front The siphonal canal is wide short recurved and flaring anteriorly The operculum is rounded triangular with an apical nucleus pale brownish 2 Distribution editThis marine species occurs in the Gulf of Panama and off Point Arena California United States References edit a b Borsonella erosina Dall 1908 Retrieved through World Register of Marine Species on 13 August 2011 W H Dall 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 L Tanner U S N Commanding XXX VII 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 v 43 p 269 1904 External links edit nbsp Wikimedia Commons has media related to Borsonella erosina Borsonella Borsonellopsis erosina Gastropods com Retrieved 15 January 2019 This Borsoniidae related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Borsonella erosina amp oldid 1192154834, wikipedia, wiki, book, books, library,
