Metrocoris coxalis, Chen & Nieser, 1993

Jehamalar, E. Eyarin & Dash, Swetapadma, 2021, Three new species of Metrocoris Mayr, 1865 (Heteroptera: Gerridae) from India and establishment of species groups, Zootaxa 5082 (4), pp. 341-356 : 345-346

Metrocoris coxalis group

Diagnosis. The venter of body black, except the mesosternum mediolaterally with a yellowish-brown mark on each side directed anteriorly and posteriorly ( Figs. 2C , 3B ), the posterior region of the abdominal venter yellowish-brown ( Figs. 2C, F, H , 3B, G, I ); the male fore femur is slender, the flexor region almost medially with a small notch and mostly with a few setae basally (see Tran and Polhemus 2017, Fig. 100); the hind coxa or both the hind coxa and the hind trochanter with a slender process or the hind trochanter is slightly produced in female ( Figs. 2B, I , 3C, J ; Chen & Nieser 1993 b, Fig. 204; Tran & Polhemus 2017, Fig. 106), the flexor region of the hind femur basally or sub-basally usually with a fringe of setae in the female ( Figs. 2I , 3J ; Tran & Polhemus 2017, Fig. 106); the proctiger of the male is sub-ovate, mediolaterally widened ( Figs. 2L , 3L ); the paramere is falciform, the dorsal region nearly middle is slightly raised usually with some setae ( Figs. 2N , 3N ; Chen & Nieser 1993 b, Figs. 193, 194; Tran & Polhemus 2017, Figs. 101, 102); the proximal region of the dorsal sclerite with a reflex angled process, the ventral sclerite of endosoma is long, surpassing well beyond the level of the lateral sclerite in the lateral view ( Fig. 2O , Chen & Nieser 1993 b, Fig. 200, Tran & Polhemus 2017, Fig. 104); the sternum VII of the female is constricted laterally and is completely covering the genital segments ( Figs. 2H , 3I ; Tran & Polhemus 2017, Fig. 107).

Included species. M. coxalis Chen & Nieser , M. issaci sp. nov., M. josephi sp. nov. and M. nigriventris Tran & Polhemus.

Distribution. India (NE), Myanmar, Vietnam.

Figures

FIGURES 2. Metrocoris issaci sp. nov., apterous form: A, male, dorsal view; B, female, dorsal view; C, male, ventral view; D, male, lateral view; E, male, abdominal tip, dorsal view; F, male, abdominal tip, ventral view; G, male, abdomen, lateral view; H, female, abdomen, ventral view; I, female, abdominal tip showing coxa and trochanter of hind leg, dorsal view; J, male, abdomen, dorsal view; K, male, genital capsule, lateral view; L, male, proctiger, dorsal view; M, male, pygophore, dorsal view; N, male, paramere, lateral view; O, male, endosoma, lateral view.

FIGURES 3. Metrocoris josephi sp. nov.: A, macropterous male, dorsal view; B, same, ventral view; C, apterous female, dorsal view; D, apterous female, lateral view; E, macropterous membrane broken male (mac-da), lateral view; F, mac-da male, abdomen, dorsal view; G, mac-da male, abdominal tip, ventral view; H, same, lateral view; I, apterous female, abdomen, ventral view; J, apterous female, abdominal tip showing coxa and trochanter of hind leg, dorsal view; K, mac-da male, genital capsule, lateral view; L, mac-da male, proctiger, dorsal view; M, mac-da male, pygophore, dorsal view; N, mac-da male, paramere, lateral view; O, mac-da male, endosoma, lateral view.