Revision of the Eurybrachidae (XVII). The new Australian genus Kamabrachys gen. nov. with ten new species (Hemiptera: Fulgoromorpha) Author Constant, Jérôme Royal Belgian Institute of Natural Sciences, O. D. Phylogeny and Taxonomy, Entomology, Vautier street 29, B- 1000 Brussels, Belgium jerome.constant@naturalsciences.be text European Journal of Taxonomy 2023 2023-10-02 895 1 1 133 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2289/9889 journal article 270778 10.5852/ejt.2023.895.2289 92bb6a65-882c-43fa-8324-1905a7d92a7e 2118-9773 8402224 75CAAC73-8100-4D16-B970-4A533DBC7000 Kamabrachys v-carinatum gen. et sp. nov. urn:lsid:zoobank.org:act: E3048362-A574-4420-96DF-6D92D901C636 Figs 5B , 69–72 Platybrachys signata – Lallemand 1935: 675 [recorded from Burnside, Northern Territory ; misidentification!]. Diagnosis The species can be recognized by the following combination of characters: (1) posterior margin of the lateroventral lobes of the pygofer ( lvl ) rounded in lateral view ( Fig. 70A ) and rounded in ventral view ( Fig. 70C ), inner margin of lobes concave in ventral view ( Fig. 70C ), ventral margin rounded in caudal view ( Fig. 70E ); (2) posterior margin of laterodorsal process of gonostylus ( ldg ) roundly emarginate, leaving a rather widely open angle between laterodorsal process and ventral process of gonostylus ( vp ) in lateral view ( Fig. 70A ); (3) crest of furcate process of periandrium ( cfp ) along distal portion, merging basally and continued on basal portion ( Fig. 72D ), in lateral view, shortly tapering in distal portion ( Fig. 72E ); (4) laterodorsal process of periandrium ( ldp ) abruptly tapering after basal half and gently tapering in distal portion, distal half sinuate and curved laterodorsad, shorter than lateroventral process ( lvp ) ( Fig. 72D–E ); (5) lateroventral process of periandrium ( lvp ) dorsoventrally flattened, falcate in a long basal portion then twisted dorsolaterad distally with apex pointing dorsolaterocephalad ( Fig. 72D–F ); (6) apicodorsal process of aedeagus ( adp ) rather weakly sinuate, moderately wide distally and tapering towards the posterior, shorter than apicoventral process ( avp ) and quite strongly diverging from it ( Fig. 72A–C ); (7) posterior wing with weakly marked whitish marking along sutural margin ( Fig. 69A ). Etymology The species epithet is formed from the letter ‘v’ and the Latin adjective ‘ carinatus ’, meaning ‘crested, carinate’. It refers to the crests of the arms of the median furcate process of the periandrium which merge together on the shaft of the process in the shape of a ‘v’. The name is a noun phrase in which the adjectival portion of the name must be neuter, as all letters are grammatically neuter. Type material Holotype AUSTRALIA • ♂ ; [ Northern Territory ], Brock’s Creek ; [ 13°28′00″ S , 131°25′07″ E ]; 8 May 1932 ; T. Campbell leg.; “Brock’s Ck, N.T., 8.5.32, T. Campbell”; ANIC . Paratypes AUSTRALIA • 1 ♂ ; [ Northern Territory ], 128 km S of Darwin ; [ 13°30′19″ S , 131°22′50″ E ]; 11 Jan. 1964 ; J. Sedlacek leg.; “Australia: N.T., 128 km S Darwin, 11.I.1964 ” “J. Sedlacek Collector, Bishop Museum”; BPBM • 1 ♂ ; [ Northern Territory ], Burnside ; [ 13°28′45″ S , 131°25′00″ E ]; Apr. 1931 ; Handschin leg.; “Burnside, N.T., April 1931 . Handschin” “ Platybrachys signata Dist. variety, det. W.E. China. 1934.”; FSAG • 1 ♂ ; [ Northern Territory ], Adelaide River Station ; [ 13°14′37″ S , 131°06′46″ E ]; Apr. 1931 ; Handschin leg.; “Adelaide R. Stn, N.T., April 1931 . Handschin”; NHMB • 1 ♂ ; [ Northern Territory ], Darwin ; [ 12°26′17″ S , 130°50′28″ E ]; Jun. 1931 ; Handschin leg.; “Darwin, N.T., Juni 1931 , Handschin”; NHMB • 1 ♂ ; [ Northern Territory ], Burnside ; [ 13°28′45″ S , 131°25′00″ E ]; May 1932 ; Handschin leg.; “Burnside, N.T., April 1931 . Handschin” “ Platybrachys signata Dist. var.”; NHMB . Description MEASUREMENTS AND RATIOS . LT: ♂ (n = 6): 9.0 mm (8.64–9.24); BV/LV (n = 1): 3.35; BF/LF (n = 1): 1.25; LP+LM/BT (n = 1): 0.90; LM/LP (n = 1): 3.10; LTg/BTg (n = 1): 2.52; LW/BW (n = 1): 1.68. HEAD ( Fig. 69A–D ). Slightly narrower than thorax. Vertex brown irregularly, usually rather poorly variegated with black; about 3.4 times as broad as long, concave with all margins slightly carinate; anterior and posterior margins rounded, parallel. Frons brown, sometimes with weak reddish hue, densely variegated with black, strongly more black than vertex; usually slightly paler on ventral portion, sometimes with a short paler median line on middle of disc; about 1.25 times as broad as long, slightly convex, slightly rugulose with peridiscal carina slightly marked; upper margin of frons weakly rounded, nearly straight in perpendicular view of frons; lateral margin slightly incurved above lateral projection of frons, more or less straight, oblique, under the projection. Clypeus brown, sometimes with weak reddish hue, with dark brown to black median line and regular oblique lines on each side of postclypeus, anteclypeus dark brown, black on sides, with median pale brown, sometimes slightly reddish line on carina; clypeus reaching mesocoxae, elongate, with median carina on anteclypeus prolongated with obsolete carina on postclypeus; base of clypeus rounded. Labium dark brown, sometimes slightly reddish, reaching metacoxae, with apical segment as long as broad, acuminate, shorter and slightly more slender than penultimate. Genae pale yellowish brown. Ocelli absent. Antennae brown, not surpassing eye, not visible from above; scape about as long as broad, pedicel subcylindrical, elongate, narrowing towards apex. THORAX ( Fig. 69A, C ). About 1.10 times as broad as combined length of pro- and mesonotum. Pronotum brown irregularly variegated with black, generally as pale as vertex; disc weakly wrinkled, carina parallel to anterior margin and 2 obsolete impressed points on disc marked by black spot; paranotal lobes brown. Mesonotum brown irregularly variegated with black, more densely black and generally darker than pronotum; disc weakly wrinkled, median and peridiscal carinae weakly marked; median carina stopped before scutellum. Tegulae bicolour with ventral half mostly black and dorsal half pale brown. Fig. 69. Kamabrachys v-carinatum gen. et sp. nov., holotype, ♂ (ANIC). A . Habitus, dorsal view. B . Habitus, ventral view. C . Habitus, lateral view. D . Habitus, perpendicular view of frons. Fig. 70. Kamabrachys v-carinatum gen. et sp. nov., holotype, ♂ (ANIC), terminalia: pygofer, anal tube and gonostyli. A . Left lateral view. B . Dorsal view. C . Ventral view. D . Left posterolateral view. E . Caudal view. Fig. 71. Kamabrachys v-carinatum gen. et sp. nov., holotype, ♂ (ANIC), genitalia. A–D . Aedeagus s. lat. and connective. A . Left lateral view. B . Dorsal view. C . Left laterodorsal view. D . Ventral view. E–I . Aedeagus s. lat., detail. E . Lateral view. F . Left laterodorsal view. G . Dorsal view. H . Ventral view. I . Anterodorsal view. TEGMINA ( Fig. 69A–C ). Pale brown irregularly variegated with darker brown and with black-brown markings along costal margin, slightly paler after nodal line than dark brown in distal portion; anteapical transverse white line usually interrupted in middle portion, when complete, very narrow in middle; small apical white marking along apical margin, extending on 2–4 cells; subrectangular black-brown transverse marking in middle portion of clavus extending from sutural margin to claval fold. Flat, elongate, about 2.5 times as long as broad; costal margin weakly rounded along basal fifth, then straight to nodal line; apex rounded. VENATION . Veins ScP+RA and RP separated close to base; first fork of MP very basal, at the level of ScP+RA–RP separation; first fork of CuA slightly before apex of clavus; clavus closed; Pcu and A1 fused at about ¾ of clavus length; Pcu+A1 reaching apical angle of clavus; numerous cells along posterior half of costal margin; numerous cross-veins on apical third delimitating small elongate cells. POSTERIOR WINGS ( Fig. 69A–B ). Yellow with apical ⅓ blackish brown, moderately broad band along posterior margin and anal area brown, paler than apical area; apical white marking sometimes present, weakly marked and extending on 2–3 cells; whitish marking along sutural margin between A1 and cubital fold, sometimes rather weakly marked. Colour more or less contrasted depending on individuals. Wings well developed, as broad as tegmina, about 1.7 times as long as broad, somewhat roundly truncate apically; anal area well developed; sutural margin hardly trilobous; not reaching apex of tegmina at rest. All main veins visible from base, forked at or after nodal line and forming a few closed cells; few transverse veinlets delimiting elongate cells on apical ¼; veins A1 and A2 sometimes with 2 terminals. LEGS ( Fig. 69A–D ). Pro- and mesofemora and tibiae brown densely variegated with dark brown to black, dorsum of pro- and mesotibiae uniformly brown; pro- and mesotarsi paler than corresponding tibia but blackish apically; posterior legs brown with apex of tibial and tarsal spines darker. Pro- and mesofemora and tibiae dorsoventrally flattened, elongate and slender; metatibiae with 3 lateral and 10 apical spines; first metatarsomere ventrally with darker pad of microsetae at internoapical angle and two rows of 5 spines. Metatibiotarsal formula: (3) 10/4/0. MALE TERMINALIA ( Figs 70–72 ). Pygofer ( Py ) rather short, as high as long and oblique in lateral view ( Fig. 70A ), about 2.6 times as wide as high in caudal view ( Fig. 70E ); basal apodeme ( bap ) well developed and sclerotized, sinuate in dorsal view ( Fig. 70A–C ); posterior margin abruptly emarginate on dorsal 1 / 5 ( Fig. 70A ), dorsal portion narrow ( Fig. 70A–B ); lateroventral lobe ( lvl ) rather strongly developed, projecting posterolaterally and broadly rounded in dorsal view ( Fig. 70B ); in ventral view, rounded anteriorly and posteriorly, more broadly rounded laterally and with inner margin excavate ( Fig. 70C ); in lateral strongly, roundly inflated posterad with uppermost portion sinuate, ventral margin more or less straight, horizontal, and anterior margin rounded ( Fig. 70A ); ventral portion separated from lateroventral lobe by a well-marked depression ( Fig. 70C, E ); ventral lamina ( vlp ) about 3.4 times as broad as long with anterior and posterior margins subparallel in ventral view, posterior margin weakly bisinuate, and posterolateral angles obliquely rounded laterally and weakly projecting posterad ( Fig. 70C ). Anal tube 1.1 times as broad as long ( An ), dorsoventrally flattened ( Fig. 70A ), subcircular with lateral margins more or less regularly rounded; apical margin rather strongly indented in middle ( Fig. 70B ); paraprocts ( pa ) at basal ¼, well developed. Gonostyli ( G ) rather short, 1.47 times as broad as long in ventral view ( Fig. 70C ); ventral process ( vp ) in ventral view rather short, subtriangular with lateral margin rather strongly sinuate, then rounded apically ( Fig. 70C ); laterodorsal process ( ldg ) narrowly visible on sides in ventral view ( Fig. 70C ), strongly sinuate in caudal view with mediolateral angle ( mla ) strongly marked ( Fig. 70E ), mediolateral angle projecting laterally ( Fig. 70A, D ), in lateral view, posterior margin roundly concave under mediolateral angle ( Fig. 70A ); dorsal hook ( dhg ) more or less subtriangular in lateral view, with anterior margin roundly excavate and posterior margin rounded above basal indentation ( Fig. 70A ), and apically curved laterodorsad and slightly cephalad ( Fig. 70B, E ). Connective ( cv ) strongly developed, about 1.3 times as long as aedeagus s. lat., with anterior pair of lateral apodemes forming a moderately broad lateral lamina directed posterolaterad and rounded apically; posterior pair of apodemes ribbon-like, strongly developed laterally and sinuate ( Fig. 71A–D ). Aedeagus s. lat. moderately upcurved with periandrium reaching about same level as aedeagus s. str. posterad ( Fig. 71E–I ). Aedeagus s. str. ( Fig. 72A–C ) with apical processes about 7.0 times as long as broad at mid-length; apicoventral process ( avp ) smoothly tapering towards the posterior and narrowly rounded apically ( Fig. 72C ); apicodorsal process ( adp ) in dorsal view ( Fig. 72A ) moderately sinuate and moderately inflated, rather regularly tapering towards apex, distally slightly diverging from apicoventral process and slightly shorter than the latter. Dorsal periandrium ( Fig. 72D–F ) with laterodorsal processes ( ldp ) dorsoventrally laminate basally and weakly curved laterad, then abruptly tapering, reflexed and curved laterodorsad along distal half, sinuate in dorsal view and apically pointed; lateroventral processes ( lvp ) dorsoventrally flattened, directed laterad, oboval on basal + / 5 , broadening from base to first ⅓, then gently tapering up to abruptly narrowing distal 1 / 5 , distal 1 / 5 directed laterocephalad and first slightly curved dorsad, then ventrad towards pointed apex, projecting posterolaterally beyond laterodorsal processes; basomedian processes ( bmp ) apically roundly blunt in dorsal view and with sides parallel in ventral view; median furcate process ( mfp ) with furca slightly shorter than shaft ( Fig. 71I ) and rather strongly upcurved in lateral view ( Fig. 72E ), dorsal crest ( cfp ) of arms of furca strongly developed, merging into a single crest extending to half-length of shaft, crests on arms slightly reflexed laterad in dorsal view ( Fig. 72D ), crest rather high along most of its length and with dorsal margin irregularly crenelated, tapering distally in lateral view ( Fig. 72E ), inner lateral walls of furca granulose ( Fig. 72D ). Fig. 72. Kamabrachys v-carinatum gen. et sp. nov., holotype, ♂ (ANIC), genitalia. A–C . Aedeagus s. str. A . Dorsal view. B . Left lateral view. C . Ventral view. D–F . Dorsal periandrium. D . Dorsal view. E . Left lateral view. F . Ventral view. SEXUAL DIMORPHISM . Unknown (no female specimen available). Distribution and biology The species is currently recorded from five nearby locations in northeastern Northern Territory ( Fig. 5B ). Bioregions: Darwin Coastal and Pine Creek. The specimens of the type series were collected during the months of January, and April to June. Host plant unknown.