Randallopsallus malayanus, Yasunaga & Duwal & Jsps, 2017

Yasunaga, Tomohide, Duwal, Ram Keshari & Jsps, 2017, Two new species of the phyline plant bug genus Randallopsallus from Southeast Asia (Hemiptera: Heteroptera: Miridae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 57 (2), pp. 457-471 : 469-470

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https://doi.org/ 10.1515/aemnp-2017-0085

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scientific name

Randallopsallus malayanus

sp. nov.

Randallopsallus malayanus sp. nov.

( Figs 6–8, 14 View Figs 1–6 View Figs 6–17 , 18, 19, 22, 25 View Figs 18–27 , 33–35 View Figs 28–35 , 41–43 View Figs 36–47 , 64 View Fig )

Type material. HOLOTYPE: J, MALAYSIA: PERAK: Taiping, Bukit Larut (Maxwell Hill), N4.8625 E100.8000, 1100 m, at mercury light, 13 Jul 1989, T. Yasunaga ( AMNH) ( AMNH _ PBI 00380575 View Materials ) GoogleMaps . PARATYPES: MALAYSIA: PERAK: Same data as for holotype, 1 J ( TYCN) ( AMNH _ PBI 00380576 View Materials ) GoogleMaps ; same data, except for date 7 Dec 1989, 1 ♀ ( TYCN) (00380577) GoogleMaps . PAHANG: Fraser’s Hill , N3.71, E101.73, 6 Jan 1997, S. Gotoh, 1 ♀ ( TYCN) (00380583) GoogleMaps .

Differential diagnosis. Similar in general appearance to R. berastagi and R. paracastaneae , from which this new species can be distinguished by the characters in the key (1st couplet), generally smaller size (Table 1), uniformly darkened, short antennal segment II that is distinctly shorter than twice the length of segment III, almost entirely dark antennal segment III, relatively light brown hemelytron ( Fig. 6 View Figs 1–6 ), well splayed-out left paramere and medium-sized right paramere ( Fig. 33 View Figs 28–35 ), broad, winged secondary blade of endosoma ( Fig. 35 View Figs 28–35 ), and enlarged, rectangular sclerotized ring ( Fig. 41 View Figs 36–47 ).

Description. Macropterous; body generally smoky brown, ovoid, somewhat elongate; dorsal surface weakly shining, with uniformly distributed, reclining, silky setae intermixed with uniformly distributed, brownish setae. Head smoky brown, with rather uniformly distributed, short, slivery, reclining setae; vertex in female narrowly pale brown along inner margin of eye ( Fig. 19 View Figs 18–27 ); clypeus slightly produced and pointed in front. Antenna dark brown; segment II almost uniformly darkened; extreme base of segment III yellowish brown. Labium shiny reddish brown; apical half of segment IV darkened. Pronotum relatively shining; scutellum brown, lighter than pronotum; pleura chocolate brown; ventral margin of propleuron yellowish brown; scent efferent system pale grayish yellow, subtriangular, with a small, ear-like process posterior to ostiole ( Fig. 14 View Figs 6–17 ). Hemelytron somber brown, paler than pronotum; cuneus somewhat tinged with red; membrane including veins pale smoky brown, semitransparent. Coxae and legs somber brown; bases and apices of pro- and mesocoxae more or less pale brown; apical 1/3 of each femur and all tibiae yellowish brown; tibial spines dark brown; tarsi pale brown; proportion of metatarsomeres I–III = 10: 15: 16. Abdomen dark brown, with ventral median part somewhat paler ( Figs 7, 8 View Figs 6–17 ). Male genitalia ( Figs 33–35 View Figs 28–35 ): Left paramere splayed-out, with a sharp hypophysis ( Fig. 33 View Figs 28–35 ); right paramere not enlarged as seen in R. paracastaneae ( Figs 29 View Figs 28–35 vs. 33); apex of phallotheca distinctly keeled ( Fig. 34 View Figs 28–35 ); endosoma distinct in form, strongly bifurcate, with secondary blade winged and spinulate from middle to apex ( Fig. 35 View Figs 28–35 ). Female genitalia ( Figs 41–43 View Figs 36–47 ): Sclerotized ring widened, rectangular ( Fig. 41 View Figs 36–47 ); medioventral extension of ventral labiate plate similar to R. berastagi ( Fig. 39 View Figs 36–47 ) but more inflated and bulbous apically ( Fig. 43 View Figs 36–47 ).

Measurements. See Table 1.

Etymology. Named for the type locality of this new species, Malaya ( Malaysia); latinized as an adjective.

Collecting circumstances. This new species was collected at a mercury light trap, facing toward a dense, primary tropical rain forest.

Distribution. West (Peninsular) Malaysia (Pahang and Perak) ( Fig. 64 View Fig ).


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