Kamabrachys brennani 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 brennani

description: Kamabrachys brennani gen. et sp. nov.
urn:lsid:zoobank.org:act: 61C66BF9-0F66-4B91-A39F-A4FE187A5BE2
Figs 5A, 10–15
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. 12A) and rounded in ventral view (Fig. 12C), inner margin of lobes concave in ventral view (Fig. 12C), ventral margin rounded in caudal view (Fig. 12E);
(2) posterior margin of laterodorsal process of gonostylus (ldg) oblique, leaving a rather acute angle between laterodorsal process and ventral process of gonostylus (vp) in lateral view (Fig. 12A);
(3) crest of furcate process of periandrium (cfp) only along distal portion and not merging basally (Fig. 14D), in lateral view, wider in distal portion (Fig. 14E);
(4) laterodorsal process of periandrium (ldp) more or less evenly tapering from base to apex and curved laterodorsad, more or less reaching level of lateroventral process (lvp) (Fig. 14D–E);
(5) lateroventral process of periandrium (lvp) dorsoventrally flattened in basal portion, up to abruptly curved laterad distal portion (Fig. 14D–F);
(6) apicodorsal process of aedeagus (adp) strongly sinuate, rather wide and stocky distally and shorter than apicoventral process (avp) (Fig. 14A–C);
(7) posterior wing without whitish marking along sutural margin (Fig. 10D).
Etymology
The species epithet is a patronym referring to Karl E.C. Brennan who collected the type series.
Type material
Holotype AUSTRALIA • ♂; [Western Australia], Neale Junction, Connie Sue Highway; 28°06′19″ S, 125°57′58″ E; 11 Mar. 2008; 397 m a.s.l.; Mercury vapour light; K.E.C. Brennan leg.; “W.A.: Neale Junction, Connie Sue Hwy, 397m, 28°06’19”S 125°57’58”E, 11 March 2008; MV light, K.E.C. Brennan”, “MLM02187”; DPIRD.
Paratypes AUSTRALIA • 1 ♀; same collection data as for holotype; “ MLM02188 ”; DPIRD • 1 ♂; [Western Australia], Neale Junction Nature Reserve; 28°16′13″ S, 125°48′53″ E; 500 m a.s.l.; Mercury vapour light; 8 Mar. 2008; K.E.C. Brennan leg.; “W.A.: Neale Junction Nature Reserve, 500m, MV light, 28°16’13”S 125°48’53”E, 08 March 2008, K.E.C. Brennan” “MLM02186”; RBINS.
Description
MEASUREMENTS AND RATIOS. LT: ♂ (n = 2): 8.14 mm (8.04–8.23), ♀ (n = 1): 9.56 mm; BV/LV: ♂ (n = 1): 3.40, ♀ (n = 1): 3.12; BF/LF: ♂ (n = 1): 1.41, ♀ (n = 1): 1.35; LP+LM/BT: ♂ (n = 1): 0.77, ♀ (n = 1): 0.76; BF/LF: ♂ (n = 1): 1.41, ♀ (n = 1): 1.35; LM/LP: ♂ (n = 1): 2.90, ♀ (n = 1): 2.99; LTg/BTg: ♂ (n = 1): 2.65, ♀ (n = 1): 2.63; LW/BW: ♂ (n = 1): 1.59, ♀ (n = 1): 1.69.
HEAD (Figs 10A–C, E, 11A–C, E). Slightly narrower than thorax. Vertex brown, more or less densely variegated with black; 3.1–3.4 times as broad as long, concave with all margins slightly carinate, slightly longer in mid-line than on sides; anterior and posterior margins rounded, subparallel. Frons mostly black irregularly variegated with brown to pale brown irregularly variegated with black; darker than vertex; sometimes with a slightly paler transverse band above lateral angles and a slightly transverse paler marking on upper middle area of frons; about 1.4 times as broad as long, slightly convex, slightly rugulose with peridiscal carina slightly marked; upper margin of frons weakly rounded in perpendicular view of frons; lateral margin slightly incurved above lateral projection of frons, slightly rounded under the projection. Clypeus brown with dense black markings: median black line and regular oblique lines on each side of postclypeus, anteclypeus black with median pale reddish-brown line on carina, sometimes paler, with black replaced by dark brown; 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 brown variegated with black or brown, generally paler than vertex. Ocelli absent. Antennae dark brown, not surpassing eye, not visible from above; scape about as long as broad, pedicel subcylindrical, elongate, narrowing towards apex.
THORAX (Figs 10A, C, 11A, C). About 1.3 times as broad as combined length of pro- and mesonotum. Pronotum brown irregularly variegated with black, generally not or slightly paler than vertex; disc weakly wrinkled, carina parallel to anterior margin and 2 obsolete impressed points on disc included in black marking; paranotal lobes dark brown variegated with paler brown. Mesonotum brown irregularly (but sometimes rather densely) 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 black and dorsal half pale brown.
TEGMINA (Figs 10A, C, 11A, C). Brown to black-brown irregularly variegated with paler markings; anteapical transverse white line, sometimes interrupted in middle portion; 2 more or less complete transverse whitish bands with irregular darker markings, more basal one at basal ⅓, second one at ⅔ of tegmen length, basal one broader and more contrasted. Flat, elongate, about 2.65 times as long as broad; costal margin weakly rounded along basal fifth, then straight or very weakly incurving 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 [in female paratype, right tegmen with MP forked at basal ⅓ of tegmen length, left tegmen normal]; 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 10D, 11D). Pale yellow with base shortly red; apical ⅓ and rather broad band along posterior margin blackish brown; anal lobe grey sometimes with area between veins A1 and A2 yellowish; apical white marking extending on 5–10 cells. Well developed, as broad as tegmina, about 1.6–1.7 times as long as broad, squarishly 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 10A–C, E, 11A–C, E). Pro- and mesofemora and tibiae brown to black-brown rather sparsely variegated with paler spots; 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 12–14). Pygofer (Py) rather short, as high as long and oblique in lateral view (Fig. 12A), about 2.25 times as wide as high in caudal view (Fig. 12E); basal apodeme (bap) well developed and sclerotized, sinuate in dorsal view (Fig. 12A–C); dorsal portion narrow (Fig. 12A–B); lateroventral lobe (lvl) projecting posterolaterally and rounded in dorsal view (Fig. 12B); in ventral view, rounded anteriorly and posteriorly, more broadly rounded laterally and with inner margin excavate (Fig. 12C); in lateral view more developed and broader in ventral portion with portion of posterior margin rather broadly rounded (Fig. 12A); ventral portion separated from lateroventral lobe by a well-marked depression (Fig. 12C, E); ventral lamina (vlp) about 3.2 times as broad as long with anterior and posterior margins parallel in ventral view, posterior margin slightly emarginated in middle and posterolateral angles rounded and weakly projecting posterad (Fig. 12C). Anal tube as long as broad (An) dorsoventrally flattened (Fig. 12A), oval with base and apex more strongly rounded than side margins; side margins tapering towards apex; apical margin slightly indented in middle (Fig. 12B); paraprocts (pa) at basal ¼, well developed. Gonostyli (G) 1.36 times as broad as long in ventral view (Fig. 12C); ventral process (vp) in ventral view subtriangular with lateral margin straight, then rounded apically (Fig. 12C); laterodorsal process (ldg) partly visible in ventral view (Fig. 12C) sinuate in caudal view with mediolateral angle (mla) well-marked (Fig. 12E), mediolateral angle projecting laterally (Fig. 12A, D); dorsal hook (dhg) rather strongly curved anteriorly in lateral view, with anterior margin roundly excavate and posterior margin subangular basally (Fig. 12A) and apically curved anterolaterad. Connective (cv) strongly developed, about 1.5 times as long as aedeagus s. lat., with anterior pair of lateral apodemes forming a moderately broad lateral lamina directed posterolaterad; posterior pair of apodemes ribbon-like [damaged in examined specimen] (Fig. 13A–D). Aedeagus s. lat. moderately upcurved with periandrium reaching level of aedeagus s. str. posteriorly (Fig. 13E–I). Aedeagus s. str. (Fig. 14A–C) with apical processes about 6.45 times as long as broad at mid-length; apicoventral process (avp) smoothly tapering towards the posterior and narrowly rounded apically; apicodorsal process (adp) in dorsal view (Fig. 14A) rather strongly inflated and stocky, rather abruptly tapering towards apex, obliquely truncate apically with apex forming a well-marked angle, and shorter than apicoventral process. Dorsal periandrium (Fig. 14D–F) with laterodorsal processes (ldp) dorsoventrally laminate basally and curved laterad,, then slightly sinuate and directed posterolaterad in dorsal view, apically pointed, in lateral view, emarginate dorsally at ¾ of length, then rather strongly tapering and curved dorsad; lateroventral processes (lvp) dorsoventrally flattened on basal ¾, moderately curved laterad at basal ⅓ and strongly tapering and curved laterad at ¾ towards pointed apex, projecting posterolaterally slightly beyond laterodorsal processes; basomedian processes (bmp) apically truncate in dorsal view and with sides parallel in ventral view; median furcate process (mfp) with furca slightly shorter than shaft (Fig. 13I) and rather strongly upcurved in lateral view (Fig. 14E), dorsal crest (cfp) on most length of arms of furca, not reflexed in dorsal view (Fig. 14D), crest slightly broadening from base to apex and with dorsal margin crenelated and ending in a point in lateral view (Fig. 14E), inner and outer lateral walls of furca slightly granulose (Fig. 14D).
FEMALE TERMINALIA (Fig. 15). Abdominal sternite VI (As VI) with sides upcurving in posteroventral view (Fig. 15C); posterior margin in ventral view (Fig. 15B) projecting posteriorly on sides with lateral margin sinuate apically; median subquadrate emargination wide; subtriangular processes apically rounded and directed posterodorsad (Fig. 15B–D); emargination between subtriangular processes and lateral projection deeply rounded (Fig. 15B–C); processes of furca of sternite VI (FAs VI) pointed, diverging, moderately developed and curved posterodorsad (Fig. 15B–C). Inner portion of gonocoxa VIII (Gx VIII) strongly curved dorsad (Fig. 15C); posterior margin of gonapophysis (Gy VIII) projecting rather strongly posterad and apically rounded (Fig. 15A–B). Lateroventral excavate membranous fold of gonocoxae VIII between sternite VI and gonapophysis VIII in posteroventral view widely open (Fig. 15C). 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. 15B–C). Gonoplacs (Gp) unilobed, large and semicircular, mostly hiding the anal tube (Fig. 15D). Gonocoxal bases IX (Gb IX) projecting laterally (Fig. 15B–C). Gonapophysis IX (Gy IX) flattened laterally, reflexed posterodorsad and strongly tapering apically (Fig. 15B, D). Anal tube (An) elongate and narrow, curved posteroventrad, v-shaped in cross section beyond anus, lanceolate in dorsal view (Fig. 15A, C).
SEXUAL DIMORPHISM. Female about 17% larger than male.
Distribution and biology
The species is currently recorded from a single location of the Great Victoria Desert in southeastern Western Australia (Fig. 5A), in Neale Junction. Bioregion: Great Victoria Desert.
The three specimens of the type series were all collected within a few days during the month of March.
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 20-29, DOI: 10.5852/ejt.2023.895.2289, http://zenodo.org/record/8402224