''Falcidens'' is one of three genera within the family
Chaetodermatida; its
radula
The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs 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 ...
consists of a single row of teeth which are
mineralized in crystalline
hydroxyapatite
Hydroxyapatite, also called hydroxylapatite (HA), is a naturally occurring mineral form of calcium apatite with the formula Ca5(PO4)3(OH), but it is usually written Ca10(PO4)6(OH)2 to denote that the crystal unit cell comprises two entities. ...
(a most unusual mineral in organisms), and its teeth are not periodically shed and replaced like in other
mollusc
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 esti ...
s.
'' For details of the radula, see
Radula#In caudofoveates.''
It contains the following species:
* ''
Falcidens acutargatus''
Salvini-Plawen, 1992
* ''
Falcidens aequabilis''
Salvini-Plawen, 1972
* ''
Falcidens caudatus''
Heath, 1918)
* ''
Falcidens chiastos''
Scheltema, 1989
* ''
Falcidens crossotus''
Salvini-Plawen, 1968
* ''
Falcidens gutturosus''
Kowalewsky, 1901)
* ''
Falcidens halanychi''
Schander, Scheltema & Ivanov, 2006
* ''
Falcidens hartmanae''
Schwabl, 1961)
* ''
Falcidens hoffmanni''
Stork, 1939)
* ''
Falcidens indicus''
Stork, 1941)
* ''
Falcidens ingolfensis''
Salvini-Plawen, 1971
* ''
Falcidens limifossorides''
Salvini-Plawen, 1986
* ''
Falcidens liosqueameus''
Salvini-Plawen, 1969
* ''
Falcidens lipuros''
Scheltema, 1989
* ''
Falcidens longus''
Scheltema, 1998
* ''
Falcidens loveni''
Nierstrasz, 1902)
* ''
Falcidens macracanthos''
Scheltema, 1998
* ''
Falcidens macrafrondis''
Scheltema, 1989
* ''
Falcidens nontargatus''
Salvini-Plawen, 1992
* ''
Falcidens normanni''
Nierstrasz, 1903)
* ''
Falcidens poias''
Scheltema, 1995
* ''
Falcidens profundus''
Salvini-Plawen, 1968
* ''
Falcidens sagittiferus''
Salvini-Plawen, 1968
* ''
Falcidens sterreri''
Salvini-Plawen, 1967)
* ''
Falcidens strigisquamatus''
Salvini-Plawen, 1977)
* ''
Falcidens targatus''
Salvini-Plawen, 1986
* ''
Falcidens targotegulatus''
Salvini-Plawen, 1992
* ''
Falcidens thorensis''
Salvini-Plawen, 1971
* ''
Falcidens vasconiensis''
Salvini-Plawen, 1996
* ''
Falcidens wireni''
Nierstrasz, 1902)
References
{{Taxonbar, from=Q3017063
Aplacophorans