Four new species of larval Erythraeoidea (Acari: Trombidiformes: Prostigmata) and three higher taxa new to China: genus Hirstiosoma and subfamily Hirstiosomatinae (Smarididae), and genus Grandjeanella (Erythraeidae: Abrolophinae)

Abstract

Four new species, Abrolophus quadrapexicis Xu & Jin sp. nov., Grandjeanella dianensis Xu & Jin sp. nov., Leptus (Leptus) trisolenidionus Xu & Jin sp. nov. and Hirstiosoma tibetensis Xu & Jin sp. nov. are described and illustrated based on larvae. The species Hirstiosoma sadafae (Amin, Khanjani & Nadri) comb. nov. is transferred from the genus Sphaerotarsus to Hirstiosoma based on gnathosoma with two pairs barbed hypostomalae (as and bs), as and bs almost equal in length. H. tibetensis sp. nov. and G. dianensis sp. nov. are from the Tibetan Plateau (Qinghai-Tibet Plateau), a unique geographical unit of the highest altitude in the world. The described H. tibetensis sp. nov. from the Tibetan Plateau represents a newly recorded subfamily from China, namely Hirstiosomatinae (Smarididae) with the genus Hirstiosoma. The genus Grandjeanella including six species distributed in Australia, New Zealand and Indonesia (Sulawesi), is new to China and the Eurasian continent as G. dianensis sp. nov. found in the southern Tibetan Plateau (Gaoligongshan National Natural Reserve). In China Abrolophus has been known from the Oriental realm, A. quadrapexicis sp. nov. makes it cover both the Palaearctic and Oriental realm of China. L. (L.) trisolenidionus sp. nov. belongs to the phalangii species group and torresianus species subgroup, which contains three species previously known in Oceania (Australia) and South America (French Guiana) and here is the first report in Asia (China).