''Falcidens'' is one of three genera within the family
Chaetodermatida; its
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 ...
consists of a single row of teeth which are
mineralized in crystalline
hydroxyapatite
Hydroxyapatite (International Mineralogical Association, IMA name: hydroxylapatite) (Hap, HAp, or HA) is a naturally occurring mineral form of calcium apatite with the Chemical formula, formula , often written to denote that the Crystal struc ...
(a most unusual mineral in organisms), and its teeth are not periodically shed and replaced like in other
mollusc
Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...
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
''Falcidens'' is one of three genera within the family Chaetodermatida; its radula consists of a single row of teeth which are Mineralization (biology), mineralized in crystalline hydroxyapatite (a most unusual mineral in organisms), and its teet ...
''
Salvini-Plawen, 1996
* ''
Falcidens wireni''
Nierstrasz, 1902)
References
{{Taxonbar, from=Q3017063
Chaetodermatidae
Taxa described in 1968