Eulophophyllum lobulatum Ingrisch & Riede

Sigfrid Ingrisch, Klaus Riede & George Beccalon, 2016, The Pink Katydids of Sabah (Orthoptera: Tettigoniidae: Phaneropterinae: Eulophophyllum) with Description of Two New Species, Journal of Orthoptera Research 25 (2), pp. 67-74 : 68-71

Eulophophyllum lobulatum Ingrisch & Riede sp. n.

urn:lsid: Orthoptera .speciesfile.org:TaxonName:493860

Holotype (male):East Malaysia: Sabah, Mt.Kinabalu NP, headquarters, Silau-Silau trail near Bukit Tupei trail (N 6° 0’ 40’’, E 116° 32’ 29’’, 1600 m a.s.l.), 25.v.1993, leg. Hoffmann ( Fig. 2 ). Depository : Zoological Research Museum Koenig ( ZFMK), Bonn , Germany.

Other material (photograph of a female, Fig. 3 G): East Malaysia: Sabah, Mt. Kinabalu, viii.2011, photographed by Mark Eller (http:// www.whatsthatbug.com/2012/02/05/unknown-katydid-fromborneo/).

Diagnosis.— The new species differs in both sexes from E. thaumasium by its tegminal venation having only five instead of six dorsal branches of MA plus R and more strikingly by the dorsal margins of the hind tibia being expanded into a pair of lateral lobes that are absent in the female holotype of E. thaumasium , which has the hind tibia of normal shape. From E. kirki sp. n., E. lobulatum sp. n. differs by the more rounded instead of oval, shape of the tegmen, which has only five instead of seven to eight dorsal branches of MA plus R. The apical area of the male cercus is wider than in E. kirki .

Description (male holotype).— Head with vertex sloping between ocelli; fastigium verticis with a medial furrow bordered by a parallel- sided rectangular carina opened behind, separated from fastigium frontis by a deep transverse furrow; lateral ocelli situated on both sides at base of that carina. Frons distinctly higher than wide, with shallow and wide subocular grooves, bulging in middle; antennae inserted between lower half of compound eyes ( Fig. 2 C). Pronotum slightly widening from anterior to posterior margin; anterior mar- gin subtruncate, very slightly concave in middle, posterior margin broadly rounded; disc flat with a faint medial carina in posterior area, lateral margins straight and subangular ( Fig. 2 B); paranota

slightly longer than high, posterior area in situ covered by a project- ing flap of tegmen. Tegmina leaf-like, strongly widened; anterior margin moderately convex near both ends, almost straight in middle; posterior margin strongly convex, nearly semi-circular ( Fig. 2 A).

Tegminal venation: Costa normal, costal field moderately widened with oblique cross veins; subcosta and radius parallel and closely approaching each other, little diverging before apex of tegmen; radius without distinct branches but connected by numer- ous weak veinlets to media anterior, two slightly stronger veinlets in posterior half of tegmen running more oblique than the other veinlets in this area might be regarded as remains of radius branches that are fused with media anterior; media forked shortly behind base; media anterior running parallel and closely approached to radius, both veins connected by numerous faint cross veinlets; media posterior fused with cubitus and the fused veins forming the hind margin of tegmen; media field (area between media anterior and media posterior) extremely widened with all cross veins within this field curved dorso-craniad, the last two of those cross veins seem to have a twofold base where the more distad might be a branch of radius; dorsal area of tegmen narrow, triangular and short ( Figs 1 C, 2A-B).

Legs: Fore tibia normal, in cross-section quadrangular, tibial tympana with conchate cover on anterior (internal) side, open on posterior (external) side; mid tibia with dorsal margins little widened in basal half; hind femur widened in basal half, narrow in apical half. Hind femur on ventral margins with four internal and seven external spinules in apical area; hind knees bi-spinose. Hind tibia with both dorsal margins strongly expanded conferring a leaf-like appearance ( Fig. 2 A-B); with numerous distinct spines on lateral margins of expanded area, on internal side nearly from

base, on external side behind basal quarter; ventral area of hind tibia compressed with a single, rounded medial margin carrying three minute spinules; only in apical area a little widened with two angular margins carrying three external and two internal spines; at tip with one dorsal and three ventral apical spurs on both sides.

Stridulatory file curved, 3.93 mm (diagonally measured and disregarding basal tubercles) with 61 teeth and four minute tu- bercles at very base; stridulatory teeth in about basal third dense and narrow (37 teeth per 1.535 mm), afterwards wide and spaced (24 teeth per 2.51 mm; Fig. 2 D). Behind stridulatory vein with a triangular semi-transparent window. Mirror in stridulatory field of right tegmen also triangular ( Fig. 2 E). Tenth abdominal tergite with apical margin wide and shallowly concave in middle, very faintly convexly projecting on both sides of concavity. Epiproct tongue- shaped, flattened, tip broadly rounded. Cerci rather stout at base but gradually narrowed and little curved towards subparallel-sided, nearly cylindrical posterior area, towards apex more strongly curved, in apical area strongly setose and at tip provided with a small acute spinule ( Figs 1 G, 2F). Subgenital plate with lateral margins slightly approaching from base to hind margin; ventral surface with a pair of longitudinal furrows separating a medial carina from lateral bulges; hind margin subtruncate or very faintly concave in middle, on both sides forming a roundish groove from which the small styli arise ( Fig. 2 G). Phallus membranous.

Coloration (male holotype): Tegmen and hind leg (especially lobes of hind tibia) yellowish brown in the dried specimen, prob- ably green when alive; hind wings transparent. Body, fore and mid legs discolored dirty brown. Face including bases of antennae light yellowish brown; compound eyes reddish brown; lateral margins of clypeus black. Disc of pronotum along fore and lateral margins light yellowish brown, centre of disc until hind margin and paranota dark brown.

Female. The female on the photograph agrees with the male holotype in general characters but its coloration resembles that of the pink variant of E. kirki sp. n. Subgenital plate not clearly visible on the photographs. Ovipositor sickle-shaped.

Coloration (based on photograph of the pink color variant of female, Fig.3 G). Head,pronotum, thorax, abdomen, and ovipositor light pink. Antennal flagellum dark brown with spaced white and black annulation.Head and pronotum pink with lighter ornaments. Pronotum with light green lateral angles. Tegmen pink to medium red in general color with anterior margin, veins and main cross veins and area between radius and media anterior pastel green; dorsal margin of tegmen in more than anterior half reddish, then light green. Fore and mid legs pink; fore tibia at base, mid tibia in basal half green; tarsi green. Hind femur pink in basal half, api- cal half green; posterior tibia green at base and very tip, the larger expanded central area pinkish red on ventral, dark red on dorsal side; posterior tarsus green.

Measurements (male holotype).— (In mm.) Body w/ wings: 33; body w/o wings: 20; pronotum: 5.8; tegmen: 28; tegmen width: 17.5; anterior femur: 7; hind femur: 23; hind tibia: 23.

Etymology.— Named for the strongly widened dorsal margins of the hind tibiae.

Stridulation.— The calling song of the male of E. lobulatum consists of short double-clicks ("zic-zic") of together about 280 - 352 ms (mean 308.65 ms ± 22.63 ms (s.d.), median 309 ms, n = 26). The time from the beginning of the first to the beginning of the second click was rather constant, between 160 - 169 ms (mean 163.96 ms ± 2.07 ms, median 164 ms (s.d.), n = 26). The song is rather loud even to the human ear, with a peak frequency between 6.5 and 8.5 kHz and a second quieter maximum between 13.5 and 14.5 kHz ( Fig. 4 A-D).

Figures

Fig. 1. A-Fı Comparison of venation of left (Aı F) or right tegmina (B-E) between Dysmorpha, Leptoderes and Eulophophyllum species (only main veins and stronger cross veinsı most drawings without dorsal field): Aı male of Dysmorpha sp. (Myanmarı Tenasserim); Bı female of Leptoderes sp. (Thailandı Takı Mae Salid); Cı male (holotype) and Dı female of E. lobulatum sp. n. (Sabahı Kinabalu); Eı fe- male (holotype) and Fı male of E. kirki sp. n. – G-Hı Left male cercus of E. lobulatum sp. n. (Gı latero-dorsal view) and E. kirki sp. n. (Hı dorso-lateral view). Left tegmina (Aı F) mirror inverted to ease comparison. Abbreviations for veins: C Costaı Ma Media anteriorı Mp Media posteriorı R Radiusı Rs Radius sectorı Sc Subcosta. Not to scale. All after photographs. Stippled line in F indicates part of tegmen hidden by hind tibia.

Fig. 2. Eulophophyllum lobulatum sp. n. male (holotype): A, lateral view original setting; B, dorsal view after spreading wings of both sides; C, frontal view of head, pronotum and fore legs; Dı stridulatory file on underside of left tegmen; E, stridulatory area of right tegmen; F, abdominal apex dorso-apical view; G, subgenital plate and cerci ventral view. Scales 10 mm (A-B), 1 mm (C-D, F-G), 5 mm (E). For color version, see Plate II.

Fig. 3. Eulophophyllum species in habitat (Aı Dı G) and sitting on red leaves (B-Cı E-F): Aı E. kirki sp. n. male (Danum); B-Fı E. kirki sp. n. female (Danum); Gı E. lobulatum sp. n. female (Kinabalu). – Aı Cı Fı Gı lateral view; Bı apical view of hind legs and ovipositor; Dı oblique lateral view. Photographs: Aı Paul Bertner; B-Eı Peter Kirk; Fı Mark Eller. For color versionı see Plate III.

Fig. 4. Stridulation of Eulophophyllum lobulatum sp. n. (holotype) in field: Aı oscillogram showing time pattern of double-click echemes of undisturbed male; Bı single double-click in greater time resolution; Cı sonogram of a single double-click; Dı spectrum analysis of sound. Aı after applying a bandpass filter 6 - 16 kHz; B-Dı from unfiltered recordings. Recordings by P. Hoffmann.