''Buchema'' 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 ...

s, marine

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 ...

Horaiclavidae. This genus was previously placed in the subfamily

Crassispirinae Pseudomelatomidae is a family of predatory sea snails, marine gastropods included in the superfamily Conoidea (previously Conacea) and part of the Neogastropoda ( Bouchet & Rocroi, 2005). In 1995 Kantor elevated the subfamily Pseudomelatomina ...

, within the

Turridae Turridae is a taxonomic family name for a number of predatory sea snails, marine gastropod mollusks in the superfamily Conoidea. MolluscaBase (2018). Turridae H. Adams & A. Adams, 1853 (1838). Accessed through: World Register of Marine Specie ...

Description

(Description by W.H. Dall as a subgenus of ''Carinodrillia'') This genus consists of moderate-sized, rather heavy shelled mollusks which resemble the members of the genus '' Carinodrillia''. They differ from ''Carinodrillia'' in having the

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 of the

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 ...

without a median carina. Here they are rounded, the early whorls smooth, succeeded by a finely axially, closely lirate portion that passes into an axially slender ribbed part, which in turn passes into the postnuclear

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 ...

. The sculpture of the postnuclear whorls consists of strong axial ribs which weaken on the posterior sinus. The axial ribs and intercostal spaces are crossed by rather heavy spiral cords, finer spiral lirations between the heavier cords, and hairlike incremental lines. The combination of these last two elements produces a fine clothlike pattern, while their junction sometimes almost appears granulose. The

columella Lucius Junius Moderatus Columella (; Arabic: , 4 – ) was a prominent writer on agriculture in the Roman Empire. His ' in twelve volumes has been completely preserved and forms an important source on Roman agriculture, together with the wo ...

is stout, and there is a weak umbilical chink at its anterior termination. 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 short, deeply channeled anteriorly and posteriorly, the posterior sinus falling a little anterior to the summit. The outer

lip The lips are the visible body part at the mouth of many animals, including humans. Lips are soft, movable, and serve as the opening for food intake and in the articulation of sound and speech. Human lips are a tactile sensory organ, and can be ...

is protracted into a clawlike element between the anterior limit of the posterior sinus and the

stromboid notch The stromboid notch is an anatomical feature which is found in the shell of one taxonomic family of medium-sized to large sea snails, the conches. Marine gastropods in the family Strombidae have a notch in the edge of the shell aperture not far ...

Species

Species within the genus ''Buchema'' include: * '' Buchema bellula'' (E. A. Smith, 1882) * '' Buchema dichroma'' Kilburn, 1988 * '' Buchema granulosa'' (Sowerby I, 1834) * '' Buchema hadromeres'' (Melvill, 1927) * '' Buchema interpleura'' (Dall & Simpson, 1901) * '' Buchema interstrigata'' (Smith E. A., 1882) * '' Buchema liella'' (Corea, 1934) * '' Buchema melanacme'' (E. A. Smith, 1882) * '' Buchema nigra'' Fallon, 2010 * '' Buchema primula'' (Melvill, 1923) * '' Buchema shearmani'' Morassi & Bonfitto, 2013Morassi, Mauro & Antonio Bonfitto. (2013). "Four new African turriform gastropods (Mollusca: Conoidea)." ''Zootaxa'' 3710 (3): 271-280. * '' Buchema tainoa'' (Corea, 1934)

References

Corea, Lois Fleming. "New marine mollusks (with three plates)." (1934).
* 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

Fallon, Phillip J , Descriptions and illustrations of some new and poorly known turrids of the tropical northwestern Atlantic. Part 1. Genera Buchema Corea, 1934 and Miraclathurella Woodring, 1928 (Gastropoda: Turridae: Crassispirinae); Nautilus 124, 2010
{{Taxonbar, from=Q3714198 Horaiclavidae Gastropod genera