Falcidens is one of three genera within the family Chaetodermatida; 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 | |
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| 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 
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| Domain: | Eukaryota |
| 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
edit- ^ 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.
- ^ 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.
- ^ "WoRMS - World Register of Marine Species - Falcidens Salvini-Plawen, 1968". www.marinespecies.org. Retrieved 4 June 2019.