Orientomiris norioi, Yasunaga, 2024

Orientomiris norioi sp. nov.

( Figs 7D–F View Fig , 8E View Fig , 9A–C View Fig , 12G View Fig , 17M–O View Fig , 19J–M View Fig )

Type material. HOLOTYPE: J, MALAYSIA: Perak, Bukit Larut [= Maxwell Hill], 1,100 m alt., 4.8624°N, 100.7999°E, UV (mercury) light trap, 4.i.1990, T. Yasunaga ( ZRC) ( AMNH _ PBI 00378804 About AMNH ) GoogleMaps . PARATYPES: MALAYSIA: Pahang, Fraser’s Hill [= Bukit Fraser], 3°43′N 101°44′E, 28–29.vi.1987, I. Hattori, 2 JJ ( TYCN); same data as for holotype, except for date 7.i.1990, 1 J ( TYCN).

Diagnosis. Currently known only from male specimens. Recognized by its generally dark brown coloration; uniformly chocolate brown labium; pale legs with darkened apical metafemur and base of metatibia; densely distributed, large metafemoral plectra ( Fig. 12G View Fig ); thumb-like pygophoral projection ( Figs 9B View Fig , 19J View Fig ); short, flattened hypophysis of left paramere ( Fig. 19K View Fig ); and elongate membranous lobes and large median sclerite on vesica ( Figs 8E View Fig , 9C View Fig ).

Description. Male. Body brown to fuscous, parallel-sided, moderate in size; dorsal surface weakly shining, with uniformly distributed, pale, simple, semierect setae ( Figs 7D, F View Fig , 17M View Fig ). Head castaneous brown, weakly shining; vertex 0.25–0.29 times as wide as head across eyes. Antenna dark brown; segment I sometimes pale brown; basal 2/3 of segment II brown or pale brown; base of segment III pale brown (basal 1/5 pale brown in partly fused antenna as in Figs 7D–F View Fig ). Labium shiny chocolate brown, slightly exceeding apex of metacoxa. Pronotum usually castaneous brown, sometimes pale brown anteriorly except for dark posterior part (Fig. 49), with pale brown collar and narrowly paler posterior margin; pleura dark brown; metathoracic scent efferent system as in Fig. 17N View Fig ; mesoscutum and scutellum dark brown, but in paler specimen mesoscutum and scutellum pale brown laterally ( Fig. 7F View Fig ). Hemelytron uniformly dark brown ( Fig. 7D View Fig ) or chestnut brown ( Fig. 7F View Fig ); exocorial serration as in Fig. 17N View Fig ; cuneus sometimes tinged with red; membrane smoky brown. Coxae and legs pale brown; apical 1/5 of metafemur and basal 1/6 of metatibia darkened; metafemoral plectra large ( Fig. 12G View Fig ); tibial spines pale brown; pretarsal structures as in Fig. 17O View Fig . Abdomen dark brown; ventral median part somewhat paler. Male genitalia ( Figs 8E View Fig , 9A–C View Fig , 19J–M View Fig ): pygophore with thumb-like process at base of left paramere ( Figs 9B View Fig , 19J View Fig ) and other smaller process at base of right paramere ( Fig. 9A View Fig ); left paramere L-shaped, with short, somewhat flattened hypophysis ( Figs 9B View Fig , 19K View Fig ); vesical lobal sclerites as in Figs 8E View Fig , 9C View Fig , 19M View Fig .

Female. Unknown.

Measurements. See Table 1.

Etymology. Named in memory of my father, Dr. Norio Yasunaga (1930–2013), who was a fish pathologist and supported my field surveys in SE Asia in 1980s; a noun in the genitive case.

Biology. Unknown. Collection records suggest this new species has two generations per year.

Distribution. Malaysia (Pahang and Perak).

Remarks. Two paratype male specimens were found to have teratological left antennomeres (cf. Figs 7D–F View Fig ). The segments II, III and IV appear to have been accidentally fused and separated into two segments, judging from the measurements ( Table 1). Several works documented similar antennal oligomery in some plant bug species ( WHEELER 2001, YASUNAGA 2018b, YASUNAGA et al. 2019).