Candona candida (O.F. Müller, 1776), G. Internal

Smith, Robin James & Kamiya, Takahiro, 2015, Four new species of the subfamily Candoninae (Crustacea, Ostracoda) from freshwater habitats in Japan, European Journal of Taxonomy 136, pp. 1-34 : 24-25

Candona candida (O.F. Müller, 1776)

Fig. 7 G–H

Material examined

16 ♀♀, from a creek leading to the south side of Akkeshi Lake, Akkeshi, Hokkaido, 43º01’16.28” N, 144º52’59.2” E, collected on 7 Sep. 2004 (locality 1 on Fig. 1 ). 13 ♀♀, from an artificial pond in Akkeshi, Hokkaido, 43º01’12.68” N, 144º50’39.12” E, collected 9 Sep. 2004 (locality 1 on Fig. 1 ). 59 ♀♀, from pools in a shallow stream in the vicinity of Akkeshi Marine Biological Station, Akkeshi, Hokkaido, 43º01’17.26” N, 144º50’22.45” E, collected 9 Sep. 2004 (locality 1 on Fig. 1 ). 5 ♀♀, from a pond and stream in the vicinity of Kiritappu Visitor Center, Kiritappu Marsh, Hamanaka, Akkeshi, Hokkaido, 43º04’58.4” N, 145º03’17.21” E, collected on the 9 Sep. 2004 (locality 1 on Fig. 1 ).

Remarks

A previous Japanese record of this species, from next to the visitor center of Kushiro Shitsugen National Park, Hokkaido, exists in the grey literature (a field guide for a post-symposium field excursion of the 14 th International Symposium on Ostracoda) ( Hiruta & Smith 2001). The additional records presented herein confirm its presence in Japan.

Ecology and distribution

The Japanese specimens of this species have been found in ponds, a creek, and shallow streams. Candona candida is found in Eurasia and North America, although rarer in the south ( Meisch 2000), and hence its presence in the cooler part of Japan is not unexpected. It is notable, however, that so far Japanese records are restricted to the eastern part of Hokkaido. The nearest previous records of C. candida to eastern Hokkaido are from the vicinity of Peter the Great Bay, Far East of Russia ( Schornikov 2004),

approximately 1000 km due west, and NE Sakhalin Island, Russia ( Schornikov & Trebukhova 2001), approximately 1100 km north.

Figures

Fig. 7. A–B. Pseudocandona atmeta sp. nov. A. Dorsal view of male carapace, anterior to left (LBM 1430006272). B. Detail of external surface of male right valve (LBM 1430006272). C–F. Pseudocandona falcula sp. nov. C. Right view of female carapace (LBM 1430006278). D. Dorsal view of female carapace, anterior to left (LBM 1430006278). E. Internal view of female left valve (LBM 1430006277). F. Internal view of female right valve (LBM 1430006277). G–H. Candona candida (O.F. Müller, 1776) G. Internal view of female left valve. H. Dorsal view of female carapace, anterior to left. Scale bar: A, C–F = 500 µm; B = 134 µm; G–H = 412 µm.

Fig. 1. Map of the main islands of Japan, showing the localities mentioned in the text.