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

description: Kamabrachys plana (Kirkaldy, 1906) gen. et comb. nov.
Figs 5B, 46–50
Euronotobrachys plana Kirkaldy, 1906: 446 [in key to species of Euronotobrachys Kirkaldy, 1906], 447 [described, compared to Euronotobrachys arcuata Kirkaldy, 1906], 315 [listed as new species of Issidae from Australia – Kirkaldy treated the Eurybrachidae as a subfamily of the Issidae].
Euronotobrachys plana – Metcalf 1956: 58 [catalogued].
non Euronotobrachys plana – Jacobi1928: 6 [recorded from Derby, Western Australia; misidentification!].
Diagnosis
The species can be recognized by the following combination of characters:
(1) posterior margin of the lateroventral lobes of the pygofer (lvl) oblique and rather strongly sinuate in lateral view (Fig. 48A) and tapering towards the posterior in ventral view (Fig. 48C), inner margin of lobes straight, slightly oblique in ventral view (Fig. 48C), ventral margin narrowly rounded in caudal view (Fig. 48E);
(2) posterior margin of laterodorsal process of gonostylus (ldg) strongly emarginate, leaving a widely open angle between laterodorsal process and ventral process of gonostylus (vp) in lateral view (Fig. 48A);
(3) crest of furcate process of periandrium (cfp) only along distal portion and not merging basally (Fig. 50D), in lateral view, roundly tapering in distal portion (Fig. 50E);
(4) laterodorsal process of periandrium (ldp) high in basal portion then strongly, angularly curved and ended in a hook-like acute point directed dorsad, short and not reaching half length of the lateroventral process (lvp) (Fig. 50D–E);
(5) lateroventral process of periandrium (lvp) dorsoventrally flattened, falcate and weakly curved laterad with apical portion pointed and directed laterodorsad (Fig. 50D–F);
(6) apicodorsal process of aedeagus (adp) strongly sinuate, rather wide and stocky distally with apical portion tapering, and shorter than apicoventral process (avp) (Fig. 50A–C);
(7) posterior wing without whitish marking along sutural margin (Fig. 46A).
Material examined
Syntype AUSTRALIA • ♀ (examined from photographs); Cairns; [Aug. 1904]; [16°55′12″ S, 145°46′48″ E]; “Cairns, Q., Austr. 8.1904.”, “ Euronoto - brachys plana ♀ 311. Holotype”; BPBM.
Additional material
AUSTRALIA • 1 ♂; [Queensland], Cairns; [16°55′12″ S, 145°46′48″ E]; MAMU • 2 ♂♂; [Queensland], Cairns District; A.M. Lea leg.; SAM • 1 ♂; [Queensland], Mareeba; [16°59′ S, 145°25′ E]; 11 Jan. 1959; Meisters leg.; MVMA.
Note
Kirkaldy designated no holotypes and the specimens in BPBM with “ Holotype ” or “ Paratype ” labels are all syntypes: these labels were added when the Hawaiian Sugar Planters’ Association collections were moved to BPBM (as explained by Medler 1987). As Kirkaldy didn’t state that he only had one specimen of E. plana, the female specimen above is recognised as a syntype in case a male specimen is uncovered in the BPBM collections later.
Description
MEASUREMENTS AND RATIOS. LT: ♂ (n = 4): 9.91 mm (9.53–10.70); ♀ (n = 1): 10.50 mm; BV/LV: ♂ (n = 1): 3.74, ♀ (n = 1): 3.50; BF/LF: ♂ (n = 1): 1.45; LP+LM/BT: ♂ (n = 1): 0.80, ♀ (n = 1): 0.78; LM/ LP: ♂ (n = 1): 3.34, ♀ (n = 1): 3.49; LTg/BTg: ♂ (n = 1): 2.61; LW/BW: ♂ (n = 1): 1.62.
HEAD (Figs 46A–D, 47A, C–D). Slightly narrower than thorax. Vertex brown irregularly variegated with black; about 3.5–3.7 times as broad as long, concave with all margins slightly carinate; anterior and posterior margins rounded, nearly parallel. Frons brown very densely variegated with black, more densely black than vertex; paler along lateroventral margins, usually with a pale spot in middle, at level of half height of eyes and often with paler transverse band slightly above level of lateral projections of frons; dorsal angles marked with a small, yellow-brown subtriangular marking; about 1.45 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 incurved above lateral projection of frons, straight or weakly rounded under the projection. Clypeus brown to reddish brown with median line and regular oblique lines on each side of postclypeus dark brown to black, anteclypeus brown with sides black along outer margin and 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 yellow-brown with some irregular brown markings. 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 46A, C, 47A, D). About 1.25–1.28 times as broad as combined length of pro- and mesonotum. Pronotum brown irregularly variegated with black, mostly like vertex; disc weakly wrinkled, carina parallel to anterior margin and 2 obsolete impressed points on disc usually included in a dark spot; slightly excavate behind middle portion of anterior margin; paranotal lobes brown. Mesonotum brown rather densely, irregularly variegated with black, 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 46A, C, 47A, D). Pale brown irregularly variegated with dark brown to black markings, slightly paler after nodal line; distal portion darker sometimes with very small white apical spot extending on 2–3 cells; anteapical transverse white line, sometimes interrupted, broader along costal margin; black squarish marking in middle of clavus; darker area along costal margin before nodal line, followed by smaller pale area. Flat, elongate, about 2.6 times as long as broad; costal margin weakly rounded along basal fifth, then straight or very weakly rounded 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. 46A). Basal half yellowish narrowly marked with red basally, distal portion dark brown extending in a rather broad brown band along posterior margin; anal lobe grey-brown. 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 46A–D, 47C–D). Pro- and mesofemora brown to reddish brown variegated with dark brown to black, more strongly so towards apex; pro- and mesotibiae ventrally brown to reddish brown variegated with dark brown to black, dorsum of protibiae uniformly dark reddish brown to blackish brown, dorsum of mesotibiae slightly paler; pro- and mesotarsi paler than corresponding tibia but darker, brownish black, apically; metafemora pale reddish brown to pale brown basally, turning darker towards apex, metatibiae and tarsi coloured as apex of 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 48–50). Pygofer (Py) rather short, as high as long and oblique in lateral view, abruptly and strongly narrowing in uppermost portion in lateral view (Fig. 48A), about 2.3 times as wide as high in caudal view (Fig. 48E); basal apodeme (bap) rather elongate, well developed and sclerotized, sinuate in dorsal view (Fig. 48A–C); dorsal portion narrow (Fig. 48A–B); lateroventral lobe (lvl) projecting posterolaterally and rounded but tapering towards the anterior and posterior in dorsal view, more strongly posteriorly (Fig. 48B); in ventral view, tapering and moderately narrowly rounded anteriorly, more strongly tapering and narrowly rounded posteriorly, rather broadly, rather regularly rounded laterally, inner margin straight, somewhat oblique (Fig. 48C); in lateral view mostly obliquely truncate posteriorly, with posterior margin rather strongly, angularly sinuate and ventral ⅓ strongly projecting posterad and forming a slightly acute angle narrowly rounded apically, anteroventral angle more or less angularly rounded, rather weakly projecting cephalad, ventral margin more or less straight in middle portion (Fig. 48A); ventral portion of pygofer separated from lateroventral lobe by a well-marked, rather deep depression (Fig. 48C, E); ventral lamina (vlp) about 3.0 times as broad as long with anterior and posterior margins subparallel in ventral view, posterior margin nearly straight with posterolateral angles rounded and moderately projecting posterad (Fig. 48C). Anal tube (An) about 1.1 times as broad as long, dorsoventrally flattened (Fig. 48A), margins more strongly rounded in basal and distal portions, less strongly so in middle portion of lateral margins, apex truncate, not or very weakly indentate (Fig. 48B); paraprocts (pa) at basal ¼, well developed. Gonostyli (G) 1.35 times as broad as long in ventral view (Fig. 48C); ventral process (vp) in ventral view subtriangular, rather short with lateral margin sinuate, then rounded apically (Fig. 48C); laterodorsal process (ldg) not visible in ventral view (Fig. 48C), strongly, angularly sinuate in caudal view with mediolateral angle (mla) very strongly marked as a fold (Fig. 48E), mediolateral angle weakly projecting laterally (Fig. 48A, D), posterior margin emarginate, nearly N-shaped in lateral view (Fig. 48A); dorsal hook (dhg) mostly oblique in lateral view, with anterior margin concave distally and posterior margin somewhat angularly truncate near apex (Fig. 48A), apically curved anterolaterad in dorsal view (Fig. 48B), projecting more or less dorsolaterad in caudal view (Fig. 48E). Connective (cv) strongly developed, about 1.5 times as long as aedeagus s. lat., with anterior pair of lateral apodemes forming a broad lateral lamina directed posterolaterad and rounded apically; posterior pair of apodemes ribbon-like, well developed laterally and sinuate (Fig. 49A–D). Aedeagus s. lat. rather strongly upcurved with periandrium reaching more or less level of apex of aedeagus s. str. posteriorly (Fig. 49E–I). Aedeagus s. str. (Fig. 50A–C) with apical processes about 6.7 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. 50A) rather strongly sinuate, strongly inflated, with lateral margin emarginate before apex and apical portion triangular, rather acutely pointed; shorter than apicoventral process. Dorsal periandrium (Fig. 50D–F) with laterodorsal processes (ldp) short, laterally flattened, directed posterad in dorsal view, high in basal portion then strongly, angularly curved and ended in a hook-like acute point directed dorsad; lateroventral processes (lvp) dorsoventrally flattened, falcate, broadening from base to first ± / 5, gently tapering in distal portion, then shortly before acutely pointed apex, rather strongly curved laterodorsad, projecting well beyond laterodorsal processes; basomedian processes (bmp) apically obliquely blunt in dorsal view and with sides parallel in ventral view; median furcate process (mfp) with furca slightly shorter than shaft (Fig. 49I) and strongly upcurved in lateral view (Fig. 50E), dorsal crest (cfp) on most length of arms of furca, slightly reflexed laterad in dorsal view (Fig. 50D, I), crest abruptly broadening basally with basal emargination then rounded and tapering in distal half towards slightly pointed apex and with dorsal margin slightly irregular in lateral view (Fig. 50E), inner and outer lateral walls of furca slightly granulose (Fig. 50D).
SEXUAL DIMORPHISM. Female about 6% larger than male.
Distribution and biology
The species is currently recorded from two nearby locations in northeastern Queensland, Cairns and Mareeba (Fig. 5B). Bioregions: Wet Tropics and Einasleigh Uplands.
The species lives in a densely populated area, the last record dates back to 1959 and host plants remain undocumented.
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 74-83, DOI: 10.5852/ejt.2023.895.2289, http://zenodo.org/record/8402224