Kamabrachys rieki, Constant, 2023

Constant, Jérôme, 2023, Revision of the Eurybrachidae (XVII). The new Australian genus Kamabrachys gen. nov. with ten new species (Hemiptera: Fulgoromorpha), European Journal of Taxonomy 895 (1), pp. 1-133 : 83-92

publication ID	https://doi.org/ 10.5852/ejt.2023.895.2289
publication LSID	lsid:zoobank.org:pub:75CAAC73-8100-4D16-B970-4A533DBC7000
DOI	https://doi.org/10.5281/zenodo.8407986
persistent identifier	https://treatment.plazi.org/id/38450F1B-4524-424E-8BEE-E84A220DEC5B
taxon LSID	lsid:zoobank.org:act:38450F1B-4524-424E-8BEE-E84A220DEC5B
treatment provided by	Plazi
scientific name	Kamabrachys rieki
status	gen. et sp. nov.

Treatment

Kamabrachys rieki gen. et sp. nov.

urn:lsid:zoobank.org:act:38450F1B-4524-424E-8BEE-E84A220DEC5B

Figs 5B View Fig , 51–56 View Fig View Fig View Fig View Fig View Fig View Fig

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. 53A View Fig ) and rounded in ventral view ( Fig. 53C View Fig ), inner margin of lobes concave in ventral view ( Fig. 53C View Fig ), ventral margin rounded in caudal view ( Fig. 53E View Fig );

(2) posterior margin of laterodorsal process of gonostylus (ldg) weakly roundly emarginate, leaving a deep acute open angle between laterodorsal process and ventral process of gonostylus (vp) in lateral view ( Fig. 53A View Fig );

(3) crest of furcate process of periandrium (cfp) only along distal portion and not merging basally ( Fig. 55D View Fig ), in lateral view, tapering towards the posterior in distal portion ( Fig. 55E View Fig );

(4) laterodorsal process of periandrium (ldp) tapering in distal portion and curved laterad then dorsad, slightly shorter than lateroventral process (lvp) ( Fig. 55D–E View Fig );

(5) lateroventral process of periandrium (lvp) dorsoventrally flattened in long basal portion and strongly curved laterad distally ( Fig. 55D–F View Fig );

(6) apicodorsal process of aedeagus (adp) moderately sinuate, dilated distally and tapering apically, and shorter than apicoventral process (avp) ( Fig. 55A–C View Fig );

(7) posterior wing without whitish marking along sutural margin ( Fig. 51A View Fig ).

Etymology

The species name is a patronym referring to the Australian entomologist Edgar Frederick Riek (1920– 2016) who collected the type series of this species.

Type material

Holotype AUSTRALIA • ♂; [Queensland], 17 km W of Kihee; 27°23′17″ S, 142°26′51″ E; 12 Oct. 1949; E.F. Riek leg.; “17 W Kihee, 12 Oct 49, E F Riek”; ANIC. GoogleMaps

Paratypes AUSTRALIA • 1 ♂; same collection data as for holotype; ANIC GoogleMaps • 1 ♀; same collection data as for holotype; RBINS GoogleMaps • 1 ♀; [Queensland], 33 km W of Kihee ; 27°23′17″ S, 142°17′15″ E; 12 Oct. 1949; E.F. Riek leg.; “33 W Kihee, 12 Oct 49, E F Riek”; ANIC GoogleMaps • 1 ♂; same collection data as for preceding; RBINS GoogleMaps .

Description

MEASUREMENTS AND RATIOS. LT: ♂ (n = 3): 8.25 mm (7.90–8.45), ♀ (n = 2): 9.44 mm (9.37–9.52); BV/ LV: ♂ (n = 1): 3.90, ♀ (n = 1): 3.78; BF/LF: ♂ (n = 1): 1.43, ♀ (n = 1): 1.39; LP+LM/BT: ♂ (n = 1): 0.78, ♀ (n = 1): 0.79; LM/LP: ♂ (n = 1): 3.17, ♀ (n = 1): 2.98; LTg/BTg: ♂ (n = 1): 2.62, ♀ (n = 1): 2.53; LW/BW: ♂ (n = 1): 1.78, ♀ (n = 1): 1.74.

HEAD ( Figs 51A–D View Fig , 52A–D View Fig ). 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, subparallel. Frons brown irregularly variegated with black, more densely black than vertex; slightly paler transverse band above lateral angles, often interrupted and reduced to 2 aligned markings; often, in middle above pale band, a narrow pale line reaching the pale band ventrally and stopped before peridiscal carina dorsally or shortened, sometimes reduced to a short elongate marking; 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 weakly curved in perpendicular view of frons; lateral margin incurved above lateral projection of frons, more or less straight to broadly rounded 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 51A, C View Fig , 52A, C View Fig ). About 1.27 times as broad as combined length of pro- and mesonotum. Pronotum brown irregularly variegated with black, generally slightly 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 brown sometimes variegated with paler spots. 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 black and dorsal half pale brown.

TEGMINA ( Figs 51A–C View Fig , 52A–C View Fig ). Pale brown irregularly variegated with black markings, slightly paler after nodal line and with background colour of apical portion darker; small apical white marking small extending along 1–3 cells; anteapical transverse white line, usually complete but narrower in middle portion, sometimes shortly interrupted; in dark specimens, 2 more or less complete transverse black bands, more basal one at basal ¼ starting from squarish or transverse black marking in middle of clavus, extending into a band to costal margin, second one at mid-length of tegmen, oblique, tapering from costal margin to vein MP, getting less distinct towards sutural margin, area between black bands much paler, with very few black markings; in pale specimens, bands not or weakly distinct, squarish black marking in clavus sometimes present. Flat, elongate, about 2.5–2.6 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 51A–B View Fig , 52A–B View Fig ). Pale yellow, narrowly marked with red basally, with apical ⅓ dark brown to blackish brown, apical white marking forming a band extending on 6–10 cells; moderately broad brown band along posterior margin and claval area infuscate. Well developed, as broad as tegmina, about 1.7–1.8 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 51A–E View Fig , 52A–D View Fig ). Pro- and mesofemora and tibiae brown, sometimes slightly reddish, densely variegated with dark brown to black, dorsum of tibiae more uniformly brown, protibiae usually slightly darker than mesotibiae; pro- and mesotarsi paler than corresponding tibia but blackish brown 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 grey pad of microsetae at internoapical angle and two rows of 5 spines. Metatibiotarsal formula: (3) 10/4/0.

MALE TERMINALIA ( Figs 53–55 View Fig View Fig View Fig ). Pygofer (Py) rather short, as high as long and oblique, rather abruptly narrowing in uppermost portion in lateral view ( Fig. 53A View Fig ), about 2.3 times as wide as high in caudal view ( Fig. 53E View Fig ); basal apodeme (bap) weakly elongate, subtriangular, well developed and sclerotized, sinuate in dorsal view ( Fig. 53A–C View Fig ); dorsal portion narrow ( Fig. 53A–B View Fig ); lateroventral lobe (lvl) projecting posterolaterally and rounded towards the anterior and towards the posterior in dorsal view ( Fig. 53B View Fig ); in ventral view, rounded anteriorly, more broadly rounded posteriorly and laterally and with inner margin concave ( Fig. 53C View Fig ); in lateral view, posterior margin broadly rounded with middle portion more weakly curved, anteroventral angle rounded and ventral margin broadly rounded ( Fig. 53A View Fig ); ventral portion of pygofer separated from lateroventral lobe by a well-marked, rather narrow and deep depression ( Fig. 53C, E View Fig ); ventral lamina (vlp) about 3.2 times as broad as long with anterior and posterior margins subparallel in ventral view, posterior margin very slightly incurved and bisinuate with posterolateral angles rounded and weakly projecting posterad ( Fig. 53C View Fig ).Anal tube (An) about as broad as long, dorsoventrally flattened ( Fig. 53A View Fig ), oval with base and apex more strongly rounded than side margins; side margins weakly subparallel in middle portion; apical margin weakly indented in middle ( Fig. 53B View Fig ); paraprocts (pa) at basal ¼, well developed. Gonostyli (G) 1.25 times as broad as long in ventral view ( Fig. 53C View Fig ); ventral process (vp) in ventral view subtriangular, moderately elongate with lateral margin weakly sinuate, then rounded apically ( Fig. 53C View Fig ); laterodorsal process (ldg) partly visible in ventral view ( Fig. 53C View Fig ), rather strongly, sinuate in caudal view with mediolateral angle (mla) moderately marked ( Fig. 53E View Fig ), mediolateral angle slightly projecting dorsally ( Fig. 53A, D View Fig ), posteroventral margin strongly oblique in ventral half in lateral view, forming an acute angle with ventral process ( Fig. 53A View Fig ), dorsal margin angularly rounded before dorsal hook; dorsal hook (dhg) subvertical and subtriangular, then angularly curved cephalad at distal ⅔ in lateral view, ( Fig. 53A View Fig ), apically curved anterolaterad ( Fig. 53B View Fig ), strongly curved laterad then sinuate and directed laterodorsad apically in caudal view ( Fig. 53E View Fig ). Connective (cv) strongly developed, about 1.4 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. 54A–D View Fig ). Aedeagus s. lat. moderately upcurved with periandrium reaching more or less level of apex of aedeagus s. str. posteriorly ( Fig. 54E– I View Fig ). Aedeagus s. str. ( Fig. 55A–C View Fig ) with apical processes about 5.7 times as long as broad at mid-length; apicoventral process (avp) smoothly tapering towards the posterior and narrowly rounded apically, weakly curved on inner margin in ventral view; apicodorsal process (adp) in dorsal view ( Fig. 55A View Fig ) rather moderately sinuate, moderately inflated, rather regularly tapering towards apex but forming a subtriangular apical acute point, and shorter than apicoventral process. Dorsal periandrium ( Fig. 55D– F View Fig ) 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, sides more or less parallel on ⅔ of length, then tapering towards apex, rather strongly but regularly curved laterad in middle portion; lateroventral processes (lvp) dorsoventrally flattened on basal + / 5, slightly broadening to basal ¼ then regularly smoothly tapering, strongly curved laterad at 1 / 5 of length, then strongly curved laterad at + / 5 of length, with distal 1 / 5 acutely pointed, projecting slightly beyond laterodorsal processes; basomedian processes (bmp) apically obliquely truncate in dorsal view and with sides parallel in ventral view; median furcate process (mfp) with furca shorter than shaft ( Fig. 54I View Fig ) and upcurved in lateral view ( Fig. 55E View Fig ), dorsal crest (cfp) on about half of length of arms of furca, vertical in dorsal view ( Fig. 55D View Fig ), crest rather abruptly starting basally in lateral view, more or less elongate-oval in lateral view, with dorsal and ventral margins subparallel along middle portion then tapering in distal ¼, and apical margin more or less pointed, dorsal margin irregular in lateral view ( Fig. 55E View Fig ), inner lateral walls of furca weakly granulose, outer walls nearly smooth ( Fig. 55D View Fig ).

FEMALE TERMINALIA ( Fig. 56 View Fig ). Abdominal sternite VI (As VI) with sides upcurving in posteroventral view ( Fig. 56C View Fig ); posterior margin in ventral view ( Fig. 56B View Fig ) projecting posteriorly on sides; median subquadrate emargination wide, wider basally ( Fig. 56B View Fig ); subtriangular processes moderately elongate, apically rounded and directed mesad and posterodorsad ( Fig. 56B–C View Fig ); emargination between subtriangular processes and lateral projection rather deeply rounded ( Fig. 56B–C View Fig ); processes of furca of sternite VI (FAs VI) pointed, diverging, moderately developed and strongly curved posterodorsad ( Fig. 56B–C View Fig ). Inner portion of gonocoxa VIII (Gx VIII) moderately curved dorsad ( Fig. 56C View Fig ); posterior margin of gonapophysis (Gy VIII) projecting rather strongly posterad and apically rounded ( Fig. 56A– B View Fig ). Lateroventral excavate membranous fold of gonocoxae VIII between sternite VI and gonapophysis VIII in posteroventral view widely open ( Fig. 56C View Fig ). 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. 56B–C View Fig ). Gonoplacs (Gp) unilobed, large and semicircular, mostly hiding the anal tube ( Fig. 56D View Fig ). Gonocoxal bases IX (Gb IX) projecting laterally ( Fig. 56B–C View Fig ). Gonapophysis IX (Gy IX) flattened laterally, reflexed posterodorsad and strongly tapering apically ( Fig. 56B, D View Fig ). Anal tube (An) elongate and narrow, curved posteroventrad, v-shaped in cross section beyond anus, lanceolate in dorsal view ( Fig. 56A, C View Fig ).

SEXUAL DIMORPHISM. Female about 14% larger than male.

Distribution and biology

The species is currently recorded from two very close locations in southwestern Queensland near Kihee ( Fig. 5B View Fig ). Bioregion: Channel Country.

The 5 specimens of the type series were all collected on a single day during the month of October.

Host plant unknown.