Pseudoteratura (Pseudoteratura) kenuan, Tan & Gorochov & Wahab, 2017

Tan, Ming Kai, Gorochov, Andrej V. & Wahab, Rodzay Bin Haji Abdul, 2017, New taxa and notes of katydids from the tribe Meconematini (Orthoptera: Meconematinae) from Brunei Darussalam, Zootaxa 4337 (3) : -

Pseudoteratura (Pseudoteratura) kenuan , new species

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:499452 ( Figs. 6 , 7 )

Material examined. Holotype (male, KB.16.59): Brunei Darussalam, Ulu Temburong National Park, Kuala Belalong Field Studies Centre along Ashton Trail , primary ridge dipterocarp forest, N4.54544, E115.15683, 158±8.0 m a.s.l., under foliage of tree after rain, 26 September 2016, 1751 hours, coll. M. K. Tan (dried pinned, ZRC).

Diagnosis. This new species is distinctly different from all the other species of this subgenus on the basis of the last male tergite having a shallower posteromedian notch, the male cercus with two apical and one basal lobes, and the characteristic male genitalia: these genitalia have one large lamellar dorsal lobe barely divided into a pair of lateral lobes, rather complicated membranous ventral lobes and an additional conical projection between these dorsal and ventral lobes.

Description. Male (holotype). Relatively small and slender Meconematini with habitus typical of this genus ( Fig. 6 ). Eyes globular and distinctly protruding ( Figs. 7A, 7B ). Frontal rostrum conical, moderately small (shorter and much narrower than scapus but longer than in Pulchroteratura ), with dorsomedian sulcus ( Fig. 7A ). Fifth (apical) segment of maxillary palpus longer than fourth (subapical) segment, slender but slightly widened apically. Fourth and third segments of subequal length, both longer than second segment. Pronotum covering base of tegminal mirror; dorsal disc roundly turned into lateral lobes, without distinct transverse sulcus; pronotum barely inflated in posterior half (when viewed in profile) ( Fig. 7B ); anterior margin of pronotal disc straight, posterior margin broadly rounded ( Fig. 7A ); humeral sinus indistinct ( Fig. 7B ); ventral margin of pronotal lateral lobe slightly sinuous ( Fig. 7B ). Thoracic auditory spiracle (= thoracic foramen) large, with ventral half elongated and dorsal half widened, not covered with pronotal lateral lobe ( Fig. 7B ). Macropterous; tegmen extending well behind hind knees; hindwing distinctly extending beyond tegmina ( Fig. 6 ). Coxal spur of fore leg relatively short and stout; both tympana oval and open; fore tibiae each with 5 outer and 4 inner subapical spines; middle tibiae each with 4-5 outer and 4 inner subapical spines; inner and outer genicular lobes of hind femora with obtuse lobe but without spinules; hind tibiae ventrally and dorsally with numerous outer and inner spines as well as 2 ventral and 1 dorsal apical spurs on each side. Tenth abdominal tergite with posterior margin emarginated widely in median part, with a pair of small obtuse lateral lobes ( Figs. 7C, 7E ). Epiproct (Ep) small and broadly rounded at base, narrowing into a shaft near basal third before bifurcating at the apical third into two fairly elongated lobes. Cerci flattened, with basal half narrow ( Figs. 7C–F ). Basal part of cercus with small inner rectangular lobe (this lobe short and with truncated apex; Figs. 7C, 7E, 7F ); distal half of cercus divided into two large flattened lobes; ventral apical lobe small and with apex broadly rounded; dorsal apical lobe larger (its shape as in Figs. 7C, 7D, 7F ). Subgenital plate elongately trapezoidal, longer than broad; apical margin truncated, with styli (Sty) short and stout ( Fig. 7G ).

Genitalia with sclerotized lamellar dorsal lobe (Dl) barely divided into a pair of rounded lateral lobes by shallow posteromedian concavity ( Fig. 7F ), a pair of membranous ventral lobes (Vl), membranous conical median process (Mp) between dorsal and ventral lobes ( Fig. 7D ); ventral lobes shaft-like, at apical third forming two broad dorsal lobes (Vl.l) ( Fig. 7D ), and two smaller narrow apical lobules (Vl.a), narrowly emarginated in between ( Figs. 7D, 7G ).

Colouration. Bright neon green when alive ( Fig. 6A ); yellow (discoloured) in alcohol ( Fig. 6B ). Head pale green, fastigium verticis black at apex. Eyes neon green. Scapus with inner side dark; pedicel yellow brown; antennae yellow brown with posterior half of each segment dark brown to black. Pronotal disc neon green with orange longitudinal median stripe in anterior half and two black spots near posterior margin. Tegmen with numerous large black infumated dots; anal tegminal margin orange. Fore and middle legs generally very pale green. Hind femur pale green; knee and hind tibia yellow green. Abdomen pale green, some tergites with one large bright yellow green dorsal spot on each segment.

Female. Unknown.

Measurement (in mm). BL = 9.7, BWL = 20.5, PL = 3.2, TL = 14.7, HWT = 2.0, HFL = 9.5, HTL = 11.2. Etymology. The species name originates from the Iban language word ke nuan (= for you), representing the first author’s gratitude of the Iban people for their intimate knowledge of the Bornean forest and skills in manoeuvring perau (= canoe-like boat) along the rivers. The Iban is a group of Dayak (= native people of Borneo).

Figures

FIGURE 6. Pseudoteratura (Pseudoteratura) kenuan sp. nov.: living male HOlOtype, dOrsal view (A) and pinned in prOfile (B). Scale bar: 5 mm.

FIGURE 7. Pseudoteratura (Pseudoteratura) kenuan sp. nov.: Head and prOnOtum in dOrsal (A) and lateral (B) views, male abdOminal apex in dOrsal (C), lateral (D), dOrsO-lateral (E), ventrO-lateral (F) and ventral (G) views. Scale bars: 1 mm (except C, 0.5 mm).