Cristaria plicata, (Leach, 1814)

Sayenko, E. M., 2016, Data on ultra-sculpture of glochidia of Cristaria tuberculata (Unionidae: Anodontinae) from the Khanka Lake (Russian Far East), The Bulletin of the Russian Far East Malacological Society 20, pp. 81-88 : 82

plicata (Leach, 1814) (Indochina and China, Mongolia, perhaps, Japan), C. tuberculata

Schumacher, 1817 (Khanka Lake including Ussury River basins), C. tenuis (Griffith et

Pidgeon, 1833) (widespread in southeastern Asia, from Yangtze River south to Cambodia), C. herculea (Middendorff, 1848) (basins of the Amur, Ussury rivers and Khanka

Lake; Buir Lake in Mongolia), C. radiata Simpson, 1900 (Anhui Province in China),

C. truncata Dang et al., 1980 (northern Vietnam), C. beirensis Liu et Zhang, 1982 (Inner

Mongolia and China), C. discoidea (Lea, 1834) (Yangtze-Huang in Indochina).

Features of larvae (glochidia) shells can provide additional data for taxonomic revision of anodontine bivalves. As to genus Cristaria , glochidia have been studied mainly with light microscopes. The first description and a schematic picture of C. herculea glochidia from Lefu River (now Ilistaya River, Primorsky Krai), formerly known as

C. plicata , were given by Shadin [1938]. Brief descriptions and schematic illustrations of C. discoidea and C. plicata (= C. spatiosa Clessin, 1875 ) glochidia from Honshu and

Hokkaido islands ( Japan) have been published by Inaba [ Inaba, 1941, 1964]. Description and a schematic illustration of C. tuberculata glochidia were made by Antonova and Starobogatov [1988]; measurements and the photos made by light microscope were published by Prozorova and Sayenko [2001]. For C. plicata , the first light microscope photos of glochidia were published in Japan [ Higashi, Hayashi, 1964]; morphometric characteristics of C. plicata glochidia were also studied by Chinese malacologists [ Wei et al., 1994]. Scanning electron microscopy was the next step in the study of Cristaria glochidia. SEM investigations were condacted for C. herculea , C. tuberculata and C. plicata [ Wu et al., 2000; Sayenko et al., 2005; Shu, Wu, 2005; Sayenko, 2006,

2013]. Among Cristaria species, data on microsculpture of the outer surface of glochidial valves are obtained only for C. plicata .

Morphology of glochidia of the freshwater anodontine C. tuberculata from Khanka

Lake, the largest freshwater lake in the Russian Far East, was examined by the light and scanning electron microscopy with a purpose to investigate the ultra-sculpture of glochidial valves and to compare new data with the characteristics of C. plicata from

Dongting Lake, the second largest freshwater lake (after Poyang Lake) in China (Hunan

Province).