Species Description: Matsui M, Kokuyo Y, Misawa Y, Nishikawa K 2004 A new species of salamander of the genus Hynobius from Central Honshu, Japan (Amphibia, Urodela) Zool. Sci. 21:661-669
Distribution and Habitat
Life History, Abundance, Activity, and Special Behaviors
Hynobius katoi belongs to the family Hynobiidae, which is one of only two salamander families exhibiting external fertilization of eggs. However, the natural history of H. katoi is poorly understood, and egg sacs or larvae have yet to be found in nature despite extensive field surveys. It is thought that breeding occurs in flowing water underground. Ovaries were examined from two collected females with 9 and 13 eggs respectively. The mean diameter of ova found in the ovaries from these two females were 4.8 and 5.0 mm. Both the animal and the vegetal poles of eggs were cream-colored. Because females with ripe eggs were collected from late April to early May, it is thought that breeding occurs in spring. The smallest young, collected in late August, is considered to have just metamorphosed. In some larvae metamorphosis seems to occur in the year of oviposition.
Matsui, M., Kokuryo, Y., Misawa, Y., and Nishikawa, K. (2004). ''A new species of salamander of the genus Hynobius from central Honshu, Japan (Amphibia, Urodela).'' Zoological Science, 21, 661-669.
Written by Nichole Winters (NicholeWinters AT gmail.com), URAP
First submitted 2007-02-15
Edited by Kellie Whittaker (2007-06-14)
Species Account Citation: AmphibiaWeb 2007 Hynobius katoi: Akaishi sansho-uo <http://amphibiaweb.org/species/6292> University of California, Berkeley, CA, USA. Accessed Oct 22, 2017.
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Citation: AmphibiaWeb. 2017. <http://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 22 Oct 2017.
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