Kamabrachys fasciata Constant 2023, gen. et sp. nov.
Creators: name: Constant, Jérôme
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Eurybrachidae
Kamabrachys
Kamabrachys fasciata

description: Kamabrachys fasciata gen. et sp. nov.
urn:lsid:zoobank.org:act: 1C9EAA6F-7002-4DA1-8D81-78E03064CD7E
Figs 5B, 34–39
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. 36A) and rounded in ventral view (Fig. 36C), inner margin of lobes concave in ventral view (Fig. 7C), ventral margin rounded in caudal view (Fig. 36E);
(2) posterior margin of laterodorsal process of gonostylus (ldg) strongly emarginate, leaving a wide opening but forming an acute angle between laterodorsal process and ventral process of gonostylus (vp) in lateral view (Fig. 36A);
(3) crest of furcate process of periandrium (cfp) only along distal portion and not merging basally (Fig. 38D), in lateral view, evenly wide in most of its length and rounded apically (Fig. 38E);
(4) laterodorsal process of periandrium (ldp) tapering in distal portion and curved laterad then strongly dorsad, slightly shorter than lateroventral process (lvp) (Fig. 38D–E);
(5) lateroventral process of periandrium (lvp) dorsoventrally flattened only in basal portion, twisted and curved dorsolaterad distally with apex pointing laterocephalad (Fig. 38D–F);
(6) apicodorsal process of aedeagus (adp) strongly sinuate, wide and stocky distally and tapering apically, and slightly shorter than apicoventral process (avp) (Fig. 38A–C);
(7) posterior wing with faint whitish marking along sutural margin, sometimes absent (Fig. 34A).
Etymology
The species epithet ‘ fasciatus ’ is a Latin adjective meaning ‘banded, striped’. It refers to the colouration of the tegmina in this species.
Type material
Holotype AUSTRALIA • ♂; [Northern Territory], Newcastle Waters; [17°21′58″ S, 133°24′05″ E]; 3 Jun. 1929; T.G. Campbell leg.; “Newcastle Waters, N. Australia, 3 June 1929, T.G. Campbell”; ANIC.
Paratypes AUSTRALIA • 1 ♂; same collection data as for holotype; RBINS • 1 spec., abdomen missing; same collection data as for holotype; AMS • 4 ♂♂, 1 ♀; same locality as for holotype; 6 Jun. 1929; T.G. Campbell; “Newcastle Waters, N. Australia, 6 June 1929, T.G. Campbell”; ANIC • 2 ♂♂; same collection data as for preceding; RBINS • 1 ♀; same collection data as for preceding; AMS • 2 ♂♂, 2 ♀♀; same locality as for preceding; 8 Jun. 1929; T.G. Campbell; “Newcastle Waters, N. Australia, 8 June 1929, T.G. Campbell”; ANIC • 1 ♂, 1 ♀; same collection data as for preceding; AMS • 2 ♀♀; same collection data as for preceding; RBINS.
Description
MEASUREMENTS AND RATIOS. LT: ♂ (n = 9): 8.09 mm (7.77–8.33), ♀ (n = 7): 8.71 mm (8.13–9.05); BV/ LV: ♂ (n = 1): 3.93, ♀ (n = 1): 3.81; BF/LF: ♂ (n = 1): 1.41, ♀ (n = 1): 1.45; LP+LM/BT: ♂ (n = 1): 0.80, ♀ (n = 1): 0.80; LM/LP: ♂ (n = 1): 3.24, ♀ (n = 1): 3.03; LTg/BTg: ♂ (n = 1): 2.66, ♀ (n = 1): 2.62; LW/BW: ♂ (n = 1): 1.61, ♀ (n = 1): 1.62.
HEAD (Figs 34A–D, 35A–D). Slightly narrower than thorax. Vertex brown irregularly variegated with black; 3.8–3.9 times as broad as long, concave with all margins slightly carinate; anterior and posterior margins rather weakly rounded, parallel. Frons brown irregularly variegated with black, more densely black than vertex; slightly paler transverse band above lateral angles; 3 pale spots transversely aligned at level of middle of eyes, sometimes merged into a narrow line, sometimes the middle spot extended longitudinally into a narrow pale line reaching the pale band ventrally and stopped before peridiscal carina dorsally; sometimes a paler narrow curved band under dorsal portion of peridiscal carina; small triangular yellowish marking at dorsolateral angles; about 1.4 times as broad as long, slightly convex, slightly rugulose with peridiscal carina slightly marked; upper margin of frons straight to very weakly curved in perpendicular view of frons; lateral margin slightly incurved above lateral projection of frons, more or less straight under the projection. Clypeus brown with median black line and regular oblique lines on each side of postclypeus, anteclypeus black with median pale reddish-brown 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, reaching metacoxae, with apical segment as long as broad, acuminate, shorter and slightly more slender than penultimate. Genae pale yellowish variegated with 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 (Figs 34A, C, 35A, C). About 1.25 times as broad as combined length of pro- and mesonotum. Pronotum brown irregularly variegated with black, generally paler than vertex; disc weakly wrinkled, carina parallel to anterior margin and 2 obsolete impressed points on disc marked by black spot, often included in a short transverse black marking; paranotal lobes pale to rather dark brown. Mesonotum brown irregularly variegated with black, more densely black and generally darker than pronotum; mostly black in dark specimens, mostly pale brown in pale specimens; disc weakly wrinkled, median and peridiscal carinae weakly marked; median carina stopped before scutellum. Tegulae bicolour with ventral half black and dorsal half pale brown.
TEGMINA (Figs 34A–C, 35A–C). Pale brown irregularly variegated with black markings, slightly paler after nodal line and with background colour of apical portion darker; small apical white marking extending along 1–3 cells; anteapical transverse white line, usually reduced to 2 white triangles along margins, sometimes with an additional elongate marking in middle, sometimes line complete but irregular; in dark specimens, 2 more or less complete transverse black bands, more basal one at basal ¼ starting from squarish black marking in middle of clavus, extending into a narrower band to costal margin, second one at mid-length of tegmen, oblique, tapering from costal margin to vein MP; in pale specimens, bands not or weakly distinct, squarish black marking in clavus sometimes present. Flat, elongate, about 2.6–2.7 times as long as broad; costal margin weakly rounded along basal fifth, then more or less 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 (Figs 34A–B, 35A–B). Pale yellow, narrowly marked with red basally, with apical ⅓ dark brown to blackish brown, apical white marking extending on 3–7 cells; in dark specimens, moderately broad brown band along posterior margin and claval area infuscate; in pale specimens, slightly darker band along posterior margin and claval area weakly infuscate; usually a paler area along posterior margin in middle lobe, often poorly distinct. Well developed, as broad as tegmina, about 1.6 times as long as broad, rounded apically; anal area well developed; sutural margin weakly 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 (Figs 34A–D, 35A–E). Pro- and mesofemora and tibiae brown densely variegated with black, dorsum of tibiae more uniformly brown; pro- and mesotarsi paler than corresponding tibia but blackish brown apically; posterior legs brown with tibiae darker than corresponding femora, 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 grey pad of microsetae at internoapical angle and two rows of 5 spines. Metatibiotarsal formula: (3) 10/4/0.
MALE TERMINALIA (Figs 36–38). Pygofer (Py) rather short, as high as long and oblique, abruptly and strongly narrowing in uppermost portion in lateral view (Fig. 36A), about 2.3 times as wide as high in caudal view (Fig. 36E); basal apodeme (bap) slightly elongate, subtriangular, well developed and sclerotized, sinuate in dorsal view (Fig. 36A–C); dorsal portion narrow (Fig. 36A–B); lateroventral lobe (lvl) projecting posterolaterally and rounded towards the anterior but roundly truncate towards the posterior in dorsal view (Fig. 36B); in ventral view, rounded anteriorly, roundly truncate posteriorly, rather broadly rounded laterally and with inner margin concave (Fig. 36C); in lateral view, posterior margin broadly rounded with middle portion more weakly curved, anteroventral angle rounded and ventral margin broadly rounded (Fig. 36A); ventral portion of pygofer separated from lateroventral lobe by a well-marked, rather narrow and deep depression (Fig. 36C, E); ventral lamina (vlp) about 3.0 times as broad as long with anterior and posterior margins subparallel in ventral view, posterior margin very slightly bisinuate with posterolateral angles rounded and projecting posterad (Fig. 36C). Anal tube (An) as broad as long, dorsoventrally flattened (Fig. 36A), oval with base and apex more strongly rounded than side margins; side margins weakly tapering towards apex; apical margin indented in middle (Fig. 36B); paraprocts (pa) at basal ¼, well developed. Gonostyli (G) 1.4 times as broad as long in ventral view (Fig. 36C); ventral process (vp) in ventral view subtriangular, rather short with lateral margin weakly excavate, then rounded apically (Fig. 36C); laterodorsal process (ldg) shortly visible in ventral view (Fig. 36C), strongly, angularly sinuate in caudal view with mediolateral angle (mla) strongly marked (Fig. 36E), mediolateral angle projecting dorsally (Fig. 36A, D), posterior margin deeply emarginate on ventral half in lateral view (Fig. 36A), posterior margin in emargination more or less straight, oblique down to narrow indentation, upper margin forming a more or less right angle with posterior margin; dorsal hook (dhg) angularly curved near apex in lateral view, with anterior margin straight, vertical, along basal ⅔ and posterior margin more or less straight along basal ⅔ then curved anterodorsad, base of hook marked with a strong indentation on posterior margin (Fig. 36A), apically curved anterolaterad (Fig. 36B), directed dorsolaterad in caudal view (Fig. 36E). 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 tapering apically; posterior pair of apodemes ribbon-like, well developed laterally and sinuate (Fig. 37A–D). Aedeagus s. lat. moderately upcurved with periandrium reaching more or less level of apex of aedeagus s. str. posteriorly (Fig. 37E–I). Aedeagus s. str. (Fig. 38A–C) with apical processes about 6.9 times as long as broad at mid-length; apicoventral process (avp) smoothly tapering towards the posterior and narrowly rounded apically, weakly curved in ventral view; apicodorsal process (adp) in dorsal view (Fig. 38A) rather strongly sinuate, strongly inflated, rather regularly tapering towards apex forming a subtriangular blunt point, and slightly shorter than apicoventral process. Dorsal periandrium (Fig. 38D–F) with laterodorsal processes (ldp) abruptly narrowing at about ⅔ of length in lateral view, then strongly curved dorsad and regularly tapering towards acutely pointed apex, in dorsal view, rather broad then rather abruptly curved laterad at about mid-length and tapering towards apex; lateroventral processes (lvp) slightly dorsoventrally flattened basally, slightly broadening to basal 1 / 5 then regularly tapering towards pointed apex, moderately curved laterad at 1 / 5 of length, then strongly curved laterad at ¾ of length, with distal ¼ slightly spiralate, projecting slightly beyond laterodorsal processes; basomedian processes (bmp) apically more or less obliquely blunt in dorsal view and with sides parallel in ventral view; median furcate process (mfp) with furca shorter than shaft (Fig. 37I) and moderately upcurved in lateral view (Fig. 38E), dorsal crest (cfp) on most length of arms of furca, vertical in dorsal view (Fig. 38D), crest abruptly starting basally with base sinuate in lateral view, then more or less oval in lateral view, with dorsal and ventral margins subparallel along a large middle portion and apical margin more or less rounded, dorsal margin slightly irregular in lateral view (Fig. 38E), inner lateral walls of furca weakly granulose, outer walls nearly smooth (Fig. 38D).
FEMALE TERMINALIA (Fig. 39). Abdominal sternite VI (As VI) with sides upcurving in posteroventral view (Fig. 39C); posterior margin in ventral view (Fig. 39B) projecting posteriorly on sides; median subquadrate emargination wide, wider basally (Fig. 39B); subtriangular processes elongate, more or less digitiform, apically rounded and directed mesad and posterodorsad (Fig. 39B–D); emargination between subtriangular processes and lateral projection deeply rounded (Fig. 39B–C); processes of furca of sternite VI (FAs VI) pointed, diverging, rather elongate and curved posterodorsad (Fig. 39B– C). Inner portion of gonocoxa VIII (Gx VIII) strongly but shortly curved dorsad (Fig. 39C); posterior margin of gonapophysis (Gy VIII) projecting posterad and lateroapically rounded (Fig. 39A–B). Lateroventral excavate membranous fold of gonocoxae VIII between sternite VI and gonapophysis VIII in posteroventral view very widely open (Fig. 39C). Inner portion of gonapophysis VIII, subtriangular processes and adjacent part of posterior margin of sternite VI, and processes of furca of sternite VI (FAs VI) densely covered in short strong setae (Fig. 39B–C). Gonoplacs (Gp) unilobed, large and semicircular, mostly hiding the anal tube (Fig. 39D). Gonocoxal bases IX (Gb IX) projecting laterally (Fig. 39C). Gonapophysis IX (Gy IX) flattened laterally, reflexed posterodorsad, rather elongate and strongly tapering apically (Fig. 39B–D). Anal tube (An) elongate and narrow, curved posteroventrad, v-shaped in cross section beyond anus, lanceolate in dorsal view (Fig. 39A, C).
SEXUAL DIMORPHISM. Female nearly 8% larger than male.
Distribution and biology
The species is currently recorded from a single location of northern central Northern Territory, Newcastle Waters (Fig. 5B). Bioregion: Mitchell Grass Downs.
The 18 specimens of the type series were all collected during an expedition in the month of June.
Host plant unknown.
description: Published as part of Constant, Jérôme, 2023, Revision of the Eurybrachidae (XVII). The new Australian genus Kamabrachys gen. nov. with ten new species (Hemiptera: Fulgoromorpha), pp. 1-133 in European Journal of Taxonomy 895 (1) on pages 56-65, DOI: 10.5852/ejt.2023.895.2289, http://zenodo.org/record/8402224