Taxonomic review of Kokeshia Miyamoto, 1960 from China, with description of ten new species (Hemiptera: Heteroptera: Schizopteridae)

Jiu-Yang Luo,Qiang Xie

doi:10.5852/ejt.2022.802.1687

Abstract

The species of Kokeshia Miyamoto, 1960 from China are reviewed, K. hsiaoi Ren & Zheng, 1992 is redescribed, and ten new species from China are described. Among these new species, K. baii sp. nov., was collected from Hong Kong, and the other nine, K. acutiformis sp. nov., K. bui sp. nov., K. caii sp. nov., K. drepanoides sp. nov., K. hilli sp. nov., K. pengae sp. nov., K. redeii sp. nov., K. renae sp. nov. and K. weirauchae sp. nov., from Yunnan. Thus, the number of known species of this genus is increased from eight to eighteen. Photographs of the habitus, forewing, abdomen and genitalic structures; drawings and scanning electron micrographs of male abdomen and genitalic structures are provided. A key to all the species currently recognized in the genus Kokeshia is presented, a distribution map and checklist for all known species is provided.

Highlights

Dipsocoromorpha Miyamoto, 1961, known as minute litter bugs, is one of the basal infraorders within true bugs
The genus Kokeshia can be recognized among Schizopterinae by the following combination of characters: (a) labium short, four-segmented; (b) tarsal formula 2–2–3; (c) forewing with costal fracture, C+Sc, R+M and R prominently thicker than other veins, medial fracture very short, subcostal cell elongated triangular, trapezoidal cell with five emanating veins, free distal remigial veins usually with a fused apical portion, and terminate before wing margin; (d) male abdominal tergite VII and sternite VII slightly asymmetrical, tergite VIII usually subdivided into two parts, and left hemitergite VIII usually with process; (e) apical portion of phallus sclerotized, tubular and coiled
We carried out a taxonomic review of all thirteen species of Kokeshia occurring in China, including ten newly described ones

Summary

Introduction

Dipsocoromorpha Miyamoto, 1961, known as minute litter bugs, is one of the basal infraorders within true bugs. Their tiny body size and cryptic habits cause them to be one of the least known groups in Heteroptera Latreille, 1810. This infraorder currently comprises 6 families and about 430 species worldwide (Štys 1995; Weirauch et al 2018; Knyshov et al 2020). Schizopteridae Reuter, 1891, the largest family of Dipsocoromorpha, had been divided into 3 subfamilies: Hypselosomatinae Esaki & Miyamoto, 1959, Ogeriinae Emsley, 1969 and Schizopterinae Reuter, 1891 by Emsley (1969), and this classification system was accepted by several subsequent authors (Štys 1985; Hill 2004; Weirauch & Štys 2014). The subfamily Ogeriinae was established by Emsley (1969), comprising Ogeria Distant, 1913; Pachyplagia Gross, European Journal of Taxonomy 802: 1–57 (2022)

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Conclusion