Onychodactylus fischeri
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Urodela
Family: Hynobiidae
Genus: Onychodactylus
Species:
O. fischeri
Binomial name
Onychodactylus fischeri
(Boulenger, 1886)
Synonyms
  • Onychodactylus rossicus Nikolsky, 1914

Onychodactylus fischeri is a lungless salamander found in Northeast Asia. It ranges through northeastern China, the Russian Far East, and the Korean Peninsula, but is only sporadically distributed within this range. Within South Korea, it is found chiefly in the high mountain valleys of Gangwon province, including the Gwangdeoksan and Daeseongsan regions. The adults feed on spiders, grubs, and insects. Common names include Fischer's clawed salamander and long-tailed clawed salamander.[1]

It has 78 chromosomes in total (27 pairs of microchromosomes, six pairs of medium-sized chromosomes, and six pairs of large chromosomes).[2]

Onychodactylus fischeri is known to live at elevations up to 1000 m, and favors thickly-vegetated stretches of pebble-bottomed mountain streams, with little direct sunlight. It may also be found near underground springs. The mating season is from mid-March to mid-May. The eggs are laid in streams; the aquatic larvae emerge after approximately 5 weeks. It is threatened by habitat change, such as tree felling in stream headwaters.[1]

The adult males of the species are 17–18 cm long; adult females are slightly longer, 18–19 cm. The dorsal aspect is yellowish brown, with bands of dark brown spots throughout. The ventral aspect is lighter in color, without spots. The head is small, flat and oval. The skin is smooth overall, but with one groove running along the center of the back. The tail is longer than the head and body combined, a fact from which the salamander takes its common name.

References

  1. 1 2 3 Sergius Kuzmin, Masafumi Matsui, Zhao Wenge, Irina Maslova, Boris Tuniyev (2004). "Onychodactylus fischeri". IUCN Red List of Threatened Species. 2004: e.T39419A10234504. doi:10.2305/IUCN.UK.2004.RLTS.T39419A10234504.en. Retrieved 20 November 2021.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  2. ↑ Iizuka, K.; Yazawa, S. (1994). "The karyotype, C-bands and AgNO3-bands of a lungless salamander from Korea: Onychodactylus fischeri (Boulenger) (Amphibia, Urodela)". Experientia. 50 (2): 171–175. doi:10.1007/BF01984959. S2CID 44020763.
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