Orientomiris chiangmai, Yasunaga, 2024

Orientomiris chiangmai sp. nov.

( Figs 6K–M View Fig , 7A–B View Fig , 8B, D View Fig , 12E View Fig , 17G–L View Fig , 18J–O View Fig )

Type material. HOLOTYPE: J, THAILAND: Chiang Mai, Baan Khun Chiang Khian, Chiang Mai Univ. Exp. Forest , 18°50′N 98°54′E, UV lighting, 15–16.xi.1989, T.Yasunaga ( DOAT) ( AMNH _PBI AMNH _ PBI 00378803 About AMNH ) GoogleMaps . PARATYPES: THAILAND: Chiang Mai, same data as for holotype, 2 JJ ( TYCN); same locality, sweeping flowers of broadleaf trees, 16–17.xi.1989, T. Yasunaga, 1 J 3 ♀♀ ( TYCN, ZRC); Chiang Mai, Doi Pui, 18°48′N 98°55′E, 18.xi.1989, T. Yasunaga, 1 ♀ ( TYCN).

Diagnosis. This new species is most closely related to the preceding O. andrzeji sp. nov., from which O. chiangmai sp. nov. can be distinguished by its paler general coloration; pale brown head with a pair of brown stripes; wider vertex in female; reddish brown labium; almost uniformly pale brown or brown hemelytron; pale base of metatibia; different pattern of sclerites on vesica (cf. Figs 6J, M View Fig ); and interramal lobe with sparser and shorter spinules restricted to distal half ( Fig. 18O View Fig ).

Description. Body pale brown to brown, parallel-sided, moderate in size; dorsal surface weakly shining, with uniformly distributed, pale, simple, semierect setae ( Figs 7A View Fig , 17G View Fig ). Head pale brown, weakly shining, with pair of brown stripes ( Fig. 7A View Fig ); vertex 0.29–0.33 (J) / 0.35–0.38 ( ♀) times as wide as head across eyes. Antenna pale brown; segment I ventrally with grayish brown stripe connecting to apical brown ring; apical 1/6–1/7 of segment II darkened; segment III brown, with two faint yellow annulations at base and apical 1/3; segment IV brown, with pale basal 1/3. Labium pale reddish brown, slightly exceeding apex of metacoxa. Pronotum usually uniformly pale brown to brown, slightly darkened along posterior margin, with pale brown collar and posterior margin; pleura uniformly pale brown; metathoracic scent efferent system as in Fig. 17H View Fig ; mesoscutum and scutellum pale brown; mesoscutum narrowly darkened medially; scutellum with small triangular fuscous macula at base and dark apex. Hemelytron brown to castaneous brown; exocorium slightly paler, with exocorial serration as in Fig. 17I View Fig ; cuneus uniformly reddish brown; membrane pale smoky brown, with fuscous veins. Coxae and legs pale brown; metafemur with two obscure fasciae subapically; metafemoral plectra as in Figs 12E View Fig , 17J View Fig ; tibial spines pale brown; pretarsal structures as in Figs 17K–L View Fig . Abdomen pale brown. Male genitalia ( Figs 6K–M View Fig , 8B, D View Fig , 18J–L View Fig ): pygophore with stout process at base of left paramere ( Fig. 8B View Fig ); left paramere semi-circularly curved, constricted at base of hypophysis ( Figs 6L View Fig , 18J View Fig ); vesical lobal sclerites as in Figs 6M View Fig , 8D View Fig , with elongate, apically hooked sclerite that is accompanied by short hair-like processes ( Fig. 6M View Fig ). Female genitalia ( Figs 18M–O View Fig ): interramal lobe weakly projected at inner margin, with sparsely distributed spinules on distal half area ( Figs 18N–O View Fig ); dorsal structure sparsely with short spinules ( Fig. 18O View Fig ).

Measurements. See Table 1.

Etymology. Named after the type locality, Chiang Mai District in northern Thailand; a noun in apposition.

Biology. Unknown. Several specimens including teneral adults were found on inflorescence of undetermined broadleaf trees.

Distribution. North Thailand ( Chiang Mai).