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''Monteiroconus'' is a
subgenus In biology, a subgenus ( subgenera) is a taxonomic rank directly below genus. In the International Code of Zoological Nomenclature, a subgeneric name can be used independently or included in a species name, in parentheses, placed between the ge ...
of
sea snail Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...
s, marine
gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...
mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000  extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...
s in the genus ''Conus'', family Conidae, the cone snails and their allies.Bouchet, P. (2011). ''Monteiroconus'' da Motta, 1991. Accessed through:
World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...
at http://www.marinespecies.org/aphia.php?p=taxdetails&id=578300 on 2011-08-07
In the latest classification of the family Conidae by Puillandre N., Duda T.F., Meyer C., Olivera B.M. & Bouchet P. (2015), ''Monteiroconus'' has become a subgenus of ''Conus'' as ''Conus (Monteiroconus)'' da Motta, 1991 (type species ''Conus ambiguus'' Reeve, 1844) represented as ''
Conus ''Conus'' is a genus of venomous and predatory cone snails.Bouchet, P.; Gofas, S. (2015). Conus Linnaeus, 1758. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&i ...
'' Linnaeus, 1758 Puillandre N., Duda T.F., Meyer C., Olivera B.M. & Bouchet P. (2015). ''One, four or 100 genera? A new classification of the cone snails''. Journal of Molluscan Studies. 81: 1-23
/ref>


Distinguishing characteristics

The Tucker & Tenorio 2009 taxonomy distinguishes ''Monteiroconus'' from ''Conus'' in the following ways:Tucker J.K. & Tenorio M.J. (2009), Systematic Classification of Recent and Fossil Conoidean Gastropods, ConchBooks, Hankenheim, Germany, 295 pp. * Genus ''Conus'' ''
sensu stricto ''Sensu'' is a Latin word meaning "in the sense of". It is used in a number of fields including biology, geology, linguistics, semiotics, and law. Commonly it refers to how strictly or loosely an expression is used in describing any particular c ...
'' Linnaeus, 1758 :: Shell characters (living and fossil species) :::The basic shell shape is conical to elongated conical, has a deep anal notch on the shoulder, a smooth
periostracum The periostracum ( ) is a thin, organic coating (or "skin") that is the outermost layer of the shell of many shelled animals, including molluscs and brachiopods. Among molluscs, it is primarily seen in snails and clams, i.e. in gastropods an ...
and a small operculum. The shoulder of the shell is usually nodulose and 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 " ...
is usually multispiral. Markings often include the presence of tents except for black or white color variants, with the absence of spiral lines of minute tents and textile bars. ::Radular tooth (not known for fossil species) :::The
radula The radula (; : radulae or radulas) is an anatomical structure used by mollusks for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters ...
has an elongated anterior section with serrations and a large exposed terminating cusp, a non-obvious waist, blade is either small or absent and has a short barb, and lacks a basal spur. ::Geographical distribution :::These species are found in the
Indo-Pacific The Indo-Pacific is a vast biogeographic region of Earth. In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the ...
region. ::Feeding habits :::These species eat other
gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...
s including
cones In geometry, a cone is a three-dimensional figure that tapers smoothly from a flat base (typically a circle) to a point not contained in the base, called the ''apex'' or '' vertex''. A cone is formed by a set of line segments, half-lines, ...
. * Subgenus ''Monteiroconus'' da Motta, 1991 ::Shell characters (living and fossil species) :::The shell is obconic in shape. The spire is usually convex in profile, 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 " ...
is multispiral. The whorl tops are concave when viewed in cross section, and cords may be present or absent. The anal notch is shallow to moderately deep. The species in this genus have a unique
periostracum The periostracum ( ) is a thin, organic coating (or "skin") that is the outermost layer of the shell of many shelled animals, including molluscs and brachiopods. Among molluscs, it is primarily seen in snails and clams, i.e. in gastropods an ...
which is thick and often scaly. The operculum is small. ::Radular tooth (not known for fossil species) :::The anterior section and the posterior section of the radular tooth are about equal in length, and the blade is long and covers about 75% of the length of the anterior section. A basal spur is present, and the barb is short. Serrations are coarse and are usually in a single row. ::Geographical distribution :::The species in this genus occur in the
West African West Africa, also known as Western Africa, is the westernmost region of Africa. The United Nations defines Western Africa as the 16 countries of Benin, Burkina Faso, Cape Verde, The Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Ma ...
and European regions. ::Feeding habits :::These cone snails are vermivorous, meaning that the cones prey on
polychaete Polychaeta () is a paraphyletic class of generally marine Annelid, annelid worms, common name, commonly called bristle worms or polychaetes (). Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called c ...
worms.


Species list

This list of species is based on the information in the
World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...
(
WoRMS The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...
) list. Species within the genus ''Monteiroconus'' include: * ''Monteiroconus ambiguus'' (Reeve, 1844) is equivalent to '' Conus ambiguus'' Reeve, 1844 * ''Monteiroconus bellocqae'' (van Rossum, 1996) is equivalent to '' Conus bellocqae'' van Rossum, 1996 * ''Monteiroconus tabidus'' (Reeve, 1844) is equivalent to '' Conus tabidus'' Reeve, 1844


References


Further reading

* Kohn A. A. (1992). "Chronological Taxonomy of ''Conus'', 1758-1840". Smithsonian Institution Press, Washington and London. * Monteiro A. (ed.) (2007)
The Cone Collector 1
1-28. * Berschauer D. (2010). ''Technology and the Fall of the Mono-Generic Family'
The Cone Collector 15
pp. 51-54 * Puillandre N., Meyer C.P., Bouchet P., and Olivera B.M. (2011), ''Genetic divergence and geographical variation in the deep-water Conus orbignyi complex (Mollusca: Conoidea)'', Zoologica Scripta 40(4) 350-363.


External links


To World Register of Marine Species

Gastropods.com: ''Conidae'' setting forth the genera recognized therein.
{{Taxonbar, from=Q6905091 Conidae Gastropod subgenera