Notes on Megalotomus Fieber, 1860 in the Palaearctic Region (Hemiptera, Heteroptera, Alydidae) Author Yi, Wenbo Department of Biology, Xinzhou Teachers University, Xinzhou 034000, China Author Wang, Shijun School of Plant Protection, Shanxi Agriculture University, Taigu 030800, China Author Zhang, Hufang Department of Biology, Xinzhou Teachers University, Xinzhou 034000, China Author Bu, Wenjun Institute of Entomology, Nankai University, Tianjin 300071, China text Zootaxa 2022 2022-04-20 5128 2 211 224 journal article 55848 10.11646/zootaxa.5128.2.3 7b070c6a-fd3e-40b6-b8b2-f38d09aa9360 1175-5326 6479798 64977C0C-5A79-47C5-96BF-7895D1FFBC7B Megalotomus costalis Stål, 1873 Megalotomus costalis Stål, 1873: 92 , Syntype (s): Japan ; NHRS. Miyamoto & Yasunaga, 1989 ; Schaefer et al. , 1989: 500–507 ; Lee, Kown & Miyamoto, 1993; Liu & Liu, 1998: 41–43 ; Dolling, 2006: 38 . Remarks. This species was originally described from Japan and is so far known from Japan ( Hokkaido and Honshu), Korea and China ( Heilongjiang Province and Shandong Province ) ( Miyamoto & Yasunaga, 1989 ; Lee, Kown & Miyamoto, 1993; Liu & Liu, 1998 ). Specimens were rather limited which made the study of some morphological characters difficult. Based on published information, this species resembles M. junceus in body size and colour, but differs from it and other Megalotomus species in the male genital structures. As noted by Schaefer et al. , 1989 on page 503, the “surcapsular spine extending beyond end of capsule, each spine with small spine arising middorsally; spine more narrow and straighter”. These characteristics were also illustrated by Liu & Liu (1998 : see illustration of fig 17, on page 43). However, the surcapsular spines illustrated by Liu & Liu (1998) crossed each other at the apex, which was contrary to other Megalotomus species. This species should be studied further once more specimens are collected.