Megalotomus costalis Stål, 1873

Yi, Wenbo, Wang, Shijun, Zhang, Hufang & Bu, Wenjun, 2022, Notes on Megalotomus Fieber, 1860 in the Palaearctic Region (Hemiptera, Heteroptera, Alydidae), Zootaxa 5128 (2), pp. 211-224 : 218

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.