''Scrinium'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

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 ...

s in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Mitromorphidae Mitromorphidae is a monophyletic family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.Bouchet, P. (2011). Mitromorphidae Casey, 1904. In: MolluscaBase (2018). Accessed through: World Register of Marin ...

, in the superfamily

Conoidea Conoidea is a superfamily of predatory sea snails, marine gastropod mollusks within the suborder Hypsogastropoda. This superfamily is a very large group of marine mollusks, estimated at about 340 recent valid genera and subgenera, and considered ...

the

cone snails A cone is a three-dimensional geometric shape that tapers smoothly from a flat base (frequently, though not necessarily, circular) to a point called the apex or vertex. A cone is formed by a set of line segments, half-lines, or lines co ...

and their allies.Rosenberg, G.; Bouchet, P. (2012). Scrinium. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=432553 on 2012-06-29

Description

The small shell is oblong and rounded at each end. It contains only a few

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane floral ...

s. The low

protoconch A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called ...

is dome-shaped. The colour is yellow and brown, uniform or variegated. There is no differentiation of the fasciole area. The

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 sc ...

consists of obscure radial ribs and faint spiral grooves. The

aperture In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. An opt ...

is rather wide and smooth within. The sinus is shallow. The outer lip is simple. The

siphonal canal The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water is ...

is short and wide, with an everted margin. The columella is concave and twisted.

Distribution

The species in this genus occur off

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

and

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...

. Fossils have been found off New Zealand, age range: 37.2 to 15.9 Ma.

Species

* † '' Scrinium blandiatum'' (Suter, 1917) * '' Scrinium brazieri'' (E. A. Smith, 1892) * † '' Scrinium callimorphum'' (Suter, 1917) * † '' Scrinium finlayi'' Powell, 1942 * '' Scrinium furtivum'' Hedley, 1922 * '' Scrinium gatliffi'' (Verco, 1909) Australian Faunal Directory : ''Scrinium gatliff''i
/ref> * '' Scrinium impendens'' (Verco, 1909) * † '' Scrinium limbatum'' Maxwell, 1992 * '' Scrinium neozelanicum'' (Suter, 1908) * † '' Scrinium ordinatum'' (Hutton, 1877) * † '' Scrinium stirophorum'' Suter, 1917 * † '' Scrinium strongi'' Marwick, 1931 * † '' Scrinium thomsoni'' Powell, 1942 ; Species brought into synonymy: * ''Scrinium neozelanica'' ic: synonym of ''Scrinium neozelanicum'' (Suter, 1908) * ''Scrinium sandersonae'' Bucknill, 1928: synonym of '' Neoguraleus sandersonae'' (Bucknill, 1928)

References

* Powell, A.W.B. 1966. ''The molluscan families Speightiidae and Turridae, an evaluation of the valid taxa, both Recent and fossil, with list of characteristic species''. Bulletin of the Auckland Institute and Museum. Auckland, New Zealand 5: 1–184, pls 1–23 * Bouchet P., Kantor Yu.I., Sysoev A. & Puillandre N. (2011) A new operational classification of the Conoidea. Journal of Molluscan Studies 77: 273-308.

External links

{{Taxonbar, from=Q7439175 Mitromorphidae Gastropod genera