Rhysida longipes

Figs 1, 4, 5

Diagnosis. Body with 21 LBS. LBS 7 th with spiracles. Antennae (Fig. 4 A, B) composed of 18 articles, of which three basal ones glabrous dorsally. Cephalic plate (Fig. 4 A) without lateral and posterior marginations; posterior edge straight and covered by tergite 1. Forcipular segment (Fig. 4 B) smooth; tooth plates with 4 + 4 teeth obviously; coxosternite with short median suture starting from toothplate. Tergites without short median sulcus; paramedian sutures complete on tergites 4 (5) – 19 (Figs 4 C, 5 A); lateral marginations incomplete on tergites 6 (10) – 20 and complete on tergite 21 (Figs 4 C, 5 A). Sternites 3 – 20 with incomplete (10 – 15 % length of sternites) paramedian sutures (Figs 4 B – D, 5 B). Coxopleural process long with 2 apical, 1 subapical, and 1 lateral spine, without dorsal spine (Fig. 5 B). Leg 1 present or absent femoral spur (Fig. 4 A, B). Prefemoral spines on ultimate legs with 2 – 3 VL, 2 – 5 VM, 0 – 1 M, and 1 – 3 DM spines; prefemoral process of ultimate legs very short with 1 spine (Fig. 5 C).

Distribution. This species is widespread in tropical mainland and island regions. It occurs in Africa (Madagascar, Seychelles, and Mauritius), Central and South America (Mexico, Peru, Cuba, and Haiti), and Central, East, and Southeast Asia (China, Taiwan, Nepal, India, Sri Lanka, Chagos Islands, Yemen, Pakistan, Iran, Myanmar, Thailand, Cambodia, Malay Peninsula, Philippines, and Papua New Guinea) (Siriwut et al. 2018; Joshi et al. 2019). In Vietnam, it has been recorded from Thua Thien Hue (Hai Van Pass); Dong Nai (Ma Da); Khanh Hoa (Spratly Islands); and Kien Giang (Phu Quoc Island) (Attems, 1938; Schileyko, 2007; Son et al. 2022); and in Dien Bien, Thai Binh, Hanoi, Ha Nam, and Quang Binh (in this study). The distribution of R. longipes was further updated (Fig. 1).