Kamimuria exilis ( McLachlan, 1872 )

Teslenko, Valentina A., 2024, Eggs of Perlidae (Insecta, Plecoptera) of the Russian Far East, Zootaxa 5551 (1), pp. 91-115 : 105

Kamimuria exilis ( McLachlan, 1872)

Figs. 51‒56

Material examined. Russia, Far East, Yakutia: 1♀, Iengra River, Yukhta Nature Reserve , 27.07.2006, coll. T. Tiunova; Khabarovsk Krai: 1 ♂, 3 ♀, upstream Anyuy River, Amur River basin, 27.08.2012, coll. V. Lyubaretz; 1♂, 1♀, Tyrma River, 1.2 km above the mouth, Amur River basin, 21.07.2005, coll. T. Nikulina; 5♂, 1♀, Chuya River, Nelkan settlement, 6.08.1999, coll. T. Tiunova; Primorsky Krai: 1♀, Pasechnaya River (Kievka River Basin), Lazo settlement, 24.07.2005, coll. Yu. Sundukov; 3♂, 4♀, Kedrovaya Pad Nature Reserve, Kedrovaya River , UV light trap, 3.08.1973, coll. Nadezhdina.

Egg. Rounded oval ( Figs. 51, 56 ), length 460−438 μm, equatorial width 324−353 μm (n=4). Collar stalked, rim flanged, and irregularly incised; sides of collar with regularly spaced ridges ( Figs. 51, 54 ). Anchor is mushroom-shaped, the pedicel long ( Figs. 53, 56 ). The anchor surface is covered with hexagonal units and globular bodies (6–11) grouped in the center of units distributed over the entire surface of the anchor plate; the anchor edge has margined triangular projections on which single or paired globular bodies are located ( Fig. 53 ). Chorion is covered with coarse and deep pits of varying size and shape; the walls of the pits are smooth, wide, and raised above floors; the quadrangular pits at the posterior pole are replaced by relatively uniform, rounded pits in the equator; in the micropylar area, the micropyles are surrounded by rosettes of large petal-shaped pits ( Figs. 51, 55 ). A row of micropyles is closer to the anterior pole; the micropylar canals or sperm guides are short, located on the walls of the pits, and directed obliquely to the anterior pole; orifices are without rims ( Figs. 51, 55 ). The extrachorionic adhesive layer has hexagonal FCI’s throughout, bearing single or paired mushroom bodies (larger than globular bodies on the anchor) in the center of each FCI ( Fig. 56 ).

Distribution: East Palaearctic species, widespread across mainland and island Asia. Russia, Siberia: Krasnoyarsky Krai, Transbaikalia; Far East: south of Yakutia, Amurskaya Oblast, Jewish Autonomous Oblast, Khabarovsk Krai, Primorsky Krai, Kunashir, and Sakhalin Islands. K. exilis occurs in Mongolia. Larvae of this species have been collected from the Han River, Chiaksan National Park, South Korea, and from the Shene River, Songhua River basin, Liaoeling Range, China ( Teslenko 2006a).

Figures

FIGURES 51–56. Kamimuria exilis (McLachlan, 1872). Russia, Far East, Primorsky Krai, Kedrovaya Pad Nature Reserve, Kedrovaya River. Egg, cleaned. 51. Habitus, lateral. 52. Habitus, dorsolateral. 53. Anchor plate with grouped globular bodies, lateral. 54. Collar, lateral. 55. Anterior pole, chorion structure, micropylar row, orifices surrounded by rosettes, lateral. 56. Uncleaned egg, habitus, lateral.