Sperchon (Sperchon) orientalis Tuzovskij, 1990

Pesic, Vladimir, Semenchenko, Ksenia A. & Lee, Wonchoel, 2015, Further studies on water mites from Korea, with description of two new species (Acari, Hydrachnidia), ZooKeys 507, pp. 1-24 : 4

Taxon classification Animalia Trombidiformes Sperchonidae

Sperchon (Sperchon) orientalis Tuzovskij, 1990 Fig. 3

Sperchon orientalis Tuzovskij 1990: 99. Synonymy.

Material examined.

SOUTH KOREA: CR20 Chungcheongbuk Province, Mt. Vorak, Deokjusanseong, stream, 36°51.705'N, 128°06.030'E, 25.v.2013 Pešić & Karanović 2/1/0 (1/0/0 mounted).

Remarks.

The specimens examined from South Korea matches the general morphology of Sperchon orientalis Tuzovskij, 1990, a species described from the Primory Territory in the Russian Far East ( Tuzovskij 2008). Due to the general shape of idiosoma (Cx-I medially separated, excretory pore surrounded by a sclerotized ring, see Fig. 3B) and palp (P-4 ventral setae strongly developed and projecting, dividing this segment in three equal parts in size, Fig. 3 C–D), Sperchon orientalis closely resembles Sperchon glandulosus Koenike, 1886, from which it differs by the eye capsule longer than diameter of Postoc., a higher number of dorsal setae on P-2 and -3 and less densely arranged dorsal setae on IV-L-3-5 ( Tuzovskij 2008).

Chung and Kim (1991) reported and illustrated Sperchon fluviatilis Uchida, 1934 from Korea. However, the excretory pore in Sperchon fluviatilis is smooth (see Uchida 1934, fig. 12-13), not sclerotized as in the illustrated male specimen from Korea. As their illustrations ( Chung and Kim 1991: fig. 3 A–D) show a general conformity with Sperchon orientalis , it is likely that the specimens attributed to Sperchon fluviatilis refer to Sperchon orientalis .

Distribution.

Far East of Russia, eastern Siberia ( Tuzovskij 2008; Semenchenko et al. 2010). New for the fauna of Korea.