''Turris carlsoni'' is an extinct

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

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 ...

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 ...

, the turrids.

Description

The length of the figured specimen, (apex and siphonal canal defective) is 43 mm. ; the width of the body whorl, 24 mm. (Original description) The large and solid shell has a fusiform shape. It contains about eight

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

spire A spire is a tall, slender, pointed structure on top of a roof of a building or tower, especially at the summit of church steeples. A spire may have a square, circular, or polygonal plan, with a roughly conical or pyramidal shape. Spires a ...

is high, with an acute apex. The whorls of the spire show a subdued angular appearance below the middle. They are slightly concave above and convex below. They are ornamented with a row of nodes on the angulation, and numerous spiral striations somewhat alternating in prominence. The suture is appressed, bordered by a sutural collar. The body whorl is ventricose, convex near the middle of the whorl, with inconspicuous or obsolete nodes, spiral sculpture the same as on the upper whorls. On some specimens the lower portion of the body whorl is marked by raised spiral cords and intercalary lines in place of the incised lines or striations. 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 ...

is oval, with a simple 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 ...

. 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 incrusted, smooth, with an anterior sulcus. The siphonal canal is moderately long and is curved to the left. Anderson, Frank Marion - Martin, Bruce - Neocene record in the Temblor Basin, California, and Neocene deposits of the San Juan District, San Luis Obispo County: Proceedings of the California Academy of Sciences Volume: 4, 1914
/ref>

Distribution

Fossils of this marine species were found in Neocene strata in

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

, USA.

References

External links

* {{DEFAULTSORT:Turris Carlsoni carlsoni Gastropods described in 1914