Falcidens

Falcidens is one of three genera within the Falcidentidae; its radula consists of a single row of teeth which are mineralized in crystalline hydroxyapatite (a most unusual mineral in organisms), and its teeth are not periodically shed and replaced like in other molluscs.[2] For details of the radula, see Radula#In caudofoveates.

Falcidens
Falcidens sp. stained with osmium tetroxide and embedded in Spurr's resin for electron microscopy, scanned in resin block. Volume rendering of a low-resolution scan, showing the anterior-most 1.4 mm of the animal.[1]
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Caudofoveata
Order:
Chaetodermatida
Family:
Chaetodermatidae
Genus:
Falcidens

Salvini-Plawen, 1968

It contains the following species:[3]

  • 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
  1. Metscher B. D. (2009) "MicroCT for comparative morphology: simple staining methods allow high-contrast 3D imaging of diverse non-mineralized animal tissues". BMC Physiology 9:11. doi:10.1186/1472-6793-9-11 Cropped from figure 13.
  2. Cruz, R.; Lins, U.; Farina, M. (1998). "Minerals of the radular apparatus of Falcidens sp. (Caudofoveata) and the evolutionary implications for the Phylum Mollusca". Biological Bulletin. 194 (2): 224–230. doi:10.2307/1543051. JSTOR 1543051. PMID 28570844.
  3. "WoRMS - World Register of Marine Species - Falcidens Salvini-Plawen, 1968". www.marinespecies.org. Retrieved 4 June 2019.
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