''Tropidoturris'' is a
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...
of
sea snails,
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 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 es ...
s 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 ...
Borsoniidae
Borsoniidae is a monophyletic family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.Bouchet, P. (2011). Borsoniidae. Accessed through: World Register of Marine Species at http://www.marinespecies.or ...
.
[Bouchet, P. (2015). Tropidoturris. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=432576 on 2016-04-04]
Description
The biconical shell shows spiral lirae, with or without strong axial ribs. 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 calle ...
contains 1½ - 2 smooth
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 flo ...
s. The distinct shoulder angle is usually very strong and crenellated by axials (when present). 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 ...
shows a thin callus but no pleats. The outer lip is thin. The anal sinus is deep and wide. The small, translucent
operculum has an oblanceolate shape and a terminal nucleus.
[Kilburn R.N. (1986). Turridae (Mollusca: Gastropoda) of southern Africa and Mozambique. Part 3. Subfamily Borsoniinae. Annals of the Natal Museum. 27: 633-720. page(s): 645]
Distribution
This marine species is
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...
to south-eastern Africa
Species
* ''
Tropidoturris anaglypta
''Tropidoturris anaglypta'' is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.WoRMS (2015). Tropidoturris anaglypta. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marine ...
''
Kilburn, 1986
* ''
Tropidoturris fossata
''Tropidoturris fossata'' is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.WoRMS (2015). Tropidoturris fossata. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespec ...
''
(Sowerby III, 1903)
* ''
Tropidoturris planilirata
''Tropidoturris planilirata'' is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.WoRMS (2015). Tropidoturris planilirata. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.ma ...
''
Kilburn, 1986
* ''
Tropidoturris scitecosta
''Tropidoturris scitecosta'' is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.WoRMS (2015). Tropidoturris scitecosta. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marin ...
''
(Sowerby III, 1903)
* ''
Tropidoturris simplicicingula
''Tropidoturris simplicicingula'' is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.WoRMS (2015). Tropidoturris simplicicingula. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http: ...
''
(Barnard, 1958)
* ''
Tropidoturris vizcondei
''Tropidoturris vizcondei'' is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.Bouchet, P. (2015). Tropidoturris vizcondei. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www. ...
''
Morassi & Bonfitto, 2013
References
External links
*
Bouchet, P.; Kantor, Y. I.; Sysoev, A.; Puillandre, N. (2011). A new operational classification of the Conoidea (Gastropoda). Journal of Molluscan Studies. 77(3): 273-308
{{Taxonbar, from=Q10385104
Gastropod genera