''Granotoma krausei'' is a species of
sea snail, a marine
gastropod mollusk
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...
in the
family
Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...
Mangeliidae
Mangeliidae is a monophyletic family of small to medium-sized, predatory sea snails, marine gastropod mollusks in the superfamily Conoidea.
Bouchet, P. (2011). Mangeliidae P. Fischer, 1883. In: MolluscaBase (2016). Accessed through: World Re ...
.
[WoRMS (2009). Granotoma krausei (Dall, 1887). In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=433921 on 2017-06-29]
There is one subspecies : ''Granotoma krausei regulus''
(W.H. Dall, 1919) (synonym: ''Oenopota regulus''
W.H. Dall, 1919.
Description
The length of the shell varies between 7 mm and 12 mm.
(Original description) The small shell is elongate and ovate, compressed. it has about six
whorls and a rather large smooth
protoconch. The transverse
sculpture
Sculpture is the branch of the visual arts that operates in three dimensions. Sculpture is the three-dimensional art work which is physically presented in the dimensions of height, width and depth. It is one of the plastic arts. Durable ...
of, on the
body whorl, consists of about twenty- six broad flattened waves, strongly flexed, most elevated over the fasciole, and becoming narrower and less prominent anteriorly. The outer angle of the anal notch is rather prominent and makes an angulation especially of the earlier whorls, which fall away in a peculiarly flattened manner to the suture. The longitudinal sculpture consists of fine sharp grooves, which pass uniformly over the ribs and interspaces, are somewhat stronger on the earlier whorls and very uniform, only a little coarser on the
siphonal canal. The notch is more marked than usual in this genus. The shell is pure white and the
epidermis is grayish yellow and quite strong.
Dall, W.H. (1887 [1886]) ''Supplementary notes on some species of mollusks of the Bering Sea and vicinity.'' Proceedings of the United States National Museum, 9 (571) : 297-309
/ref>
Distribution
This species occurs in the Sea of Japan
The Sea of Japan is the marginal sea between the Japanese archipelago, Sakhalin, the Korean Peninsula, and the mainland of the Russian Far East. The Japanese archipelago separates the sea from the Pacific Ocean. Like the Mediterranean Sea, i ...
, the Bering Sea and off Alaska
Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S. ...
and British Columbia
British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...
.
References
External links
*
Tucker, J.K. 2004 ''Catalog of recent and fossil turrids (Mollusca: Gastropoda)''. Zootaxa 682:1–1295.
Gulbin, Vladimir V. "Review of the Shell-bearing Gastropods in the Russian Waters of the East Sea (Sea of Japan). III. Caenogastropoda: Neogastropoda." The Korean Journal of Malacology 25.1 (2009): 51–70.
krausei
Gastropods described in 1887
{{Mangeliidae-stub