A new record of Antennoseius avius (Karg, 1976) (Acari: Mesostigmata; Ascidae) from Korea

Abstract

Mites in the cohort Gamasina of Mesostigmata are freeliving soildwelling predators. These mites are rel atively abundant in soil with over five thousand species recorded . The group is charac terized by having a bilateral extension of tracheal open ing, stigmata in association with the peritreme which may have plastron function in some genera and allows long submergence (Koehler, 1999). Egg may be produc ed sexually or parthenogenetically. A six legged larva hatches which after two molts of protonymph and deu tonymph develops into the adult with sexual organs. Gamasina are often used as soil bioindicators for reasons: their functional role in the soil ecosystem as predators, high species richness of the communities, intermediate abundances, robustness towards sampling and extraction methods, and good identifiability (Koehler, 1999).The family Ascidae Viogts and Oudemans, 1905 was revised in 1965 by Lindquist and Evans with 22 genera. Then several new genera had been added. According to more recent concept of , the fam ily Ascidae includes two subfamilies, Ascinae and Arc toseiinae. This revised family concept is based on (I) posterior region of dorsal shield with setae Z5 generally inserted lateral to J5 on deutonymphs and adults; (II) fe male epigynal shield with posterior margin usually gen tly rounded or truncated; (III) female with anal shield usually oval or with ventrianal shield. The subfamily Ascinae sensu is equivalent in definition of Lindquist and Evans (1965). Attributes in clude: (i) dorsal shield setation generally holotrichous (setae S2 and J3 present); (ii) female with humeral setae r3r6 usually on soft cuticle; (iii) female sternal shield often more weakly sclerotized anteriorly, such that setae st1 often on desclerotized cuticle or weak jugular plate lets; (iv) male with endopodal shield alongside coxae IIIIV usually free from or narrowly connected to stern itigenital shield; (v) arthrodial envelope at base of mov able cheliceral digit not fimbriated; (vi) genu IV with nine setae, including al2 and pd3; (vii) tibia III with eight or nine setae, al2 present, pl2 present or absent; (viii) tibia IV with ten setae, including al2, pl2, and pd3. These items (I), (II), (III) for the family and among items (iv) for the subfamily, all of which are homoplas tic, the above character states for the family and subfam ily readily accommodate Antennoseius. All aspects of the setation on legs I to IV of Antennoseius are typical of the subfamily Ascinae (Lindquist and Moraza, 2009). Species diversity of Ascidae encompasses 39 genera, 558 species in the world (Hallan, 2005) and 10 genera 12 species in Korea (NIBR, 2013).Leg I of genus Antennoseius is usually longer than the idiosoma and tarsus I usually has no claws and pulvilli.