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Winter fauna of soil dwelling microdispid mites (Acari: Pygmephoroidea: Microdispidae) with a new record for Iran

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عنوان دوره: سومین کنگره بین المللی حشره شناسی ایران
نویسندگان
1Department of Plant Protection, Faculty of Plant Production, Gorgan University of agricultural science and natural resource, Gorgan, Iran,
2Department of Plant Protection, Faculty of Plant Production, Gorgan University of agricultural science and natural resource, Gorgan, Iran, .
چکیده
Although, many of heterostigmatic mites take advantages of the phoresy association, but almost all of them, prefer to be free-living in some periods of their life. Four families Pygmephoridae, Neopygmephoridae, Scutacaridae and Microdispidae constitute almost the largest superfamily in Heterostigmata (Acari: Prostigmata), known as Pygmephoroidea. The family Microdispidae Cross, 1965 includes 25 described genera and more than 120 species that are mostly fungivorous and inhibiting soil, litter, mosses, decaying plant material and some phoretic on various arthropods. During a survey on soil dwelling mite fauna in Gorgan, northern Iran in 2018-19, four species of microdispid mites, including Paramicrodis puscrenulatus (Savulkina, 1978), Premicrodis pusheterocaudatus Khaustov and Chydyrov, 2010, Pre. rackae Khaustov, 2006 and Pre. brevisetus Khaustov, 2006 was obtained from the soil sample treated by Berlese funnel. These four species could be identified by the following characters: Para. crenulatus: All dorsal setae indistinctly barbed; setae d and f blunt-ended, other dorsal setae pointed; setae 1a and 2a with several large barbs, setae 1b, 2b, 3a, 3b, and 3c indistinctly barbed, other ventral setae smooth; setae ps2 vestigial. Pre. heterocaudatus: Setae ps‌‌‌‌3 distinctly longer than ps1, setae sc2 and dsubequal, setae ps2 absent. Pre. rackae: Setae sc2 and c1subequal; setae c2 and c1 situated almost at the same level; bases of setae e associated with well-developed oblique ridges; setae 4a andps2 absent. Pre. brevisetus: setae sc2 distinctly longer than c1; setae c2 distinctly anterior to c1; bases of setae e associated with well-developed oblique ridges; setae 4a and ps2 absent. Previous records of these species are as follow. Para. crenulatus: in the nest of a small mammal from Bulgaria, beneath elytra of a carabid beetle Pterostichus niger (Schaller, 1783) (Col.: Carabidae) in a rotten log of Fagus orientalis from Crimea, and associated with Lucanu sibericus Motschulsky (Col.: Lucanidae) from Golestan province (Norhtern Iran). Pre. heterocaudatus: soil under cotton-plants and in a nest of the ant Catoglyphus pallida (Mayr) from Turkmenistan. Pre. rackae: in the nest of an undetermined small mammal, from Ukraine; in bottom of a vial containing ethanol 70% and two beetles Oryctes nasicornis (Col.: Scarabaeidae) from Golestan province (Norhtern Iran). Pre. brevisetus: in a rotten log of Fagus orientalis form Ukraine, Oxythyrea cinctellaand Oryctes nasicornis (Col.: Scarabaeidae) from Golestan and Mazandaran provinces (Norhtern Iran). Therefore, this is the first record of Pre. heterocaudatus from Iran.
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