The Mite Genus Histiogaster (Acari: Acaridae) in the Eastern Palaearctic, With a Description of Two New Species and Report of Pre-Copulatory Guarding

Abstract

Two new species of the mite genus Histiogaster—H. litoralis sp. n. and H. tareevi sp. n.—are described from Eastern Russia based on males and females. Histiogaster ornata are redescribed based on males, females and heteromorphic deutonymphs. For H. litoralis, pre-copulatory guarding of tritonymphs is reported based on observations in a laboratory culture. This contrasts with the mites from the H. arborsignis species group which lacking this behavior. An annotated checklist and a key to the species of Histiogaster from the Eastern Palearctic are provided.

A new species of the mite genus Sancassania (Acari: Acaridae) associated with alfalfa production losses in China

“…1987, China: Fujian), S. hughesi (Samsinak 1966, China: Anhui) [this is a Cosmoglyphus ], S. kunshanensis (Zou & Wang 1991), S. mycophagus (Megnin 1874, China: Jiangsu), S. oudemansi (Zachvatkin 1937, China: Jiangxi) [this is a Cosmoglyphus ], S. rhizoglyphoides (Zachvatkin 1937, China: Anhui) [this is a Neoacotyledon ], S. shanghaiensis (Zou & Wang 1989, China: Shanghai). In addition, Klimov recorded acaroid mites from northern and eastern Asia, with 17 species of the genus Sancassania , including 8 species in China (Klimov & Tolstikov 2011). Other records include S. caroli (Channabasavanna et al .…”

“…The Grandjean's organ of S. alfalfa is simple, flattened, weakly curved. Additionally, several species in the genus Sancassania were recorded in Korea including S. rodionovi (= S. berlesei ) (Lee et al 1980), S. phyllophagianus (Ree et al 1997), and S. sphaerogaster (Klimov & Tolstikov 2011). Klimov & OConnor (2003) described and illustrated seven Sancassania species.…”

“…Overall, as new species of Sancassania are being discovered, detailed morphological characterization data and illustrations are very important because genetically different species may be extremely similar morphologically (Klimov et al 2004). Klimov & Tolstikov (2011) summarized taxonomic information about mites of the superfamily Acaridae found in northern (Asian part of Russia) and eastern Asia (Japan, China, Korea and North Korea), which includes 18 species of the genus Sancassania , with illustrations. Nine species of the genus Sancassania (as Caloglyphus ) have been reported from various localities in Pakistan (Sarwar & Ashfaq 2004; Sarwar & Ashfaq 2006; Sarwar & Ashfaq 2010a; Sarwar & Ashfaq 2010b; Sarwar et al 2005; Sarwar et al 2009).…”

Morphological ontogeny of Eubelba danubedeltaica sp. nov. (Acari, Oribatida, Damaeidae) and comments on Eubelba Miko

“…Most notogastral setae are curved in the majority of species and smooth, but in E. cornuta (Wang & Norton, 1995) and E. sasakawai (Enami, 1989) they are flattened and smooth. In E. flammeisetosa (Tolstikov, 1995) they are flattened and barbed while in E. sarvari (Tolstikov 1995) these setae are thin, smooth, relatively short, and appear to be pliable. The Eubelba species compared in Table 4 differ also from one another by the length of some setae ( in , c 1 , p 1 ), presence of apophysis Bp and E2 , and length of leg IV.…”

“…Among the adults of Eubelba species, the shape of all leg segments, setae and solenidia is known in E. flammeisetosa (Tolstikov, 1995), E. heterosetosa (Bayartogtokh, 2004), E. prasadi (Bayartogtokh, 2000), and E. sculpta, investigated by Tolstikov (1995), Bayartogtokh (2004), Bayartogtokh (2000), and Lamos (2019) respectively. The legs of E. danubedeltaica most resemble those of E. prasadi which also have many long setae, curved in apical part, and which are most clearly observed on leg IV.…”