Sakaeratiella, Yasunaga, 2024

Yasunaga, Tomohide, 2024, Reassessment of characters of the ‘ Orientomiris-group’, with descriptions of three new genera and eight new species of the tribe Mirini from the Oriental Region (Hemiptera: Heteroptera: Miridae), Acta Entomologica Musei Nationalis Pragae 64 (2), pp. 397-426 : 416

Sakaeratiella gen. nov.

Type species. Adelphocorisella adelphocoroides Yasunaga, Shishido & Yamada, 2016 .

Diagnosis. This new genus can be distinguished from other mirines by several distinct features: presence of stridulatory device ( Figs 12T , 20D–20E ); relatively porrect head; long labium much longer than antennal segment II; carinate posterior margin of pronotum; spines on apical metafemur; slender, tapered right paramere; and a single stout spicule on vesica.

Description. Male (holotype). Body elongate oval, nearly parallel-sided ( Fig. 11F ), rather small in Orientomiris- -group (total body length 6.0 mm); basic coloration coffee brown; dorsal surface weakly shining, with uniformly distributed, pale brown, semierect, simple setae ( Fig. 20B ). Head oblique, somewhat porrect, triangular in dorsal view; vertex about 1.5 times as wide as eye, with faint, narrow, longitudinal, mesal sulcus; frons shallowly and obliquely striolate. Antenna longer than body; segment I shiny fuscous, somewhat clavate; segments II–IV uniformly creamy yellow, similar in thickness; segment II longer than metafemur; segment IV longer than I. Labium shiny dark brown, long, thick, reaching posterior margin of abdominal sternum VII, much longer than antennal segment II. Pronotum relatively shining, with yellowish white collar and carinate posterior margin ( Fig. 20B ), impunctate, with sparsely distributed, pale, simple, semierect setae ( Fig. 20A ); collar about as thick as antennal segment II; metathoracic scent efferent system relatively produced ( Fig. 20C ); scutellum matte, minutely and roughly rugose, slightly inflated ( Fig. 20B ). Hemelytra matte, almost uniformly coffee brown, covered with reticular microstructures; lateral margin of exocorium serrate ( Fig. 20D ). Metafemur with strong spines apically ( Fig. 20F ) and field of plectra dorsally ( Figs 12T , 20E ); apical part of metatibia with densely distributed, small spines ( Fig. 20G ); pretarsal structure as in Fig. 20I ; parempodia relatively long. Male genitalia ( Figs 20J–M ): pygophore lacking process at base of parameres ( Fig. 20J ); left paramere with rather developed hypophysis ( Fig. 20K ); right paramere slender, tapered toward apex ( Fig. 20L ); vesica with a single long, stout spicule ( Fig. 20M ).

Female. Unknown.

Etymology. Named after the type locality, Sakaerat (Nakhon Ratchasima, Thailand), with diminutive suffix; feminine.

Biology. Unknown.

Distribution. Thailand (Nakhon Ratchasima).

Figures

Fig. 12. Scanning electron micrographs of metafemoral plectra (all at 1000×). A – Pseudomegacoelum beckeri (Fieber, 1870). B – Megacoelum infusum (Herrich-Schaeffer, 1837). C – Muttiocapsus cruciger sp. nov. D – M.teradai sp. nov. E – Orientomiris chiangmai sp. nov.F – O. andrzeji sp. nov. G – O. norioi sp. nov. H – O. shoheii sp. nov. I – O. eurytus (Yasunaga, 1988). J – O. tricolor (Scott, 1880). K – O. flavicollaris Yasunaga, 1997. L – O. nigripes Yasunaga, 1997. M – O. yaeyamanus Yasunaga, 1997. N – O. straminipes (Distant, 1909). O – O. sp. 1. P – Sakaeratiella adelphocoroides (Yasunaga, Shishido & Yamada, 2017). Q – Creontiades bipunctatus Poppius, 1915. R – Cheilocapsidea rufescens (Yasunaga, 1995). S – Neomegacoelum vitreum (Kerzhner, 1988). T – Vairocanamiris jordiribesi Yasunaga, 2011.

Fig. 20. Scanning electron micrographs for Sakaeratiella adelphocoroides (Yasunaga, Shishido & Yamada, 2016), holotype male (A–M), and male genitalia of Adelphocorisella lespedezae Miyamoto & Yasunaga, 1993 (N–O).A – anterior body, left lateral view. B – pronotum, scutellum and anterior forewing. C – metathoracic scent efferent system. D – forewing notches. E – metafemur, dorsal surface. F – same, ventral surface. G – apex of metatibia. H – metatarsus. I – pretarsal structure of hind leg. J, N – genital segment (pygophore). K – left paramere. L – right paramere. M, O – vesica.

Fig. 11. Habitus images of various mirine plant bugs examined in this study. A – Creontiades bipunctatus Poppius, 1915, female. B – Neomegacoelum vitreum (Kerzhner, 1988), male (left) and female. C – Orientomiris tricolor (Scott, 1880), female. D – O. straminipes (Distant, 1909), female. E – Poppiocapsidea sp., undetermined female specimen from Singapore.F – Sakaeratiella adelphocoroides (Yasunaga, Shishido & Yamada, 2016), holotype male.