Constant, Jérôme, 2018, Revision of the Eurybrachidae XIV. The Australian genera Olonia Stål, 1862 and Stalobrachys gen. nov. (Hemiptera: Fulgoromorpha), European Journal of Taxonomy 486, pp. 1-97: 12-17
treatment provided by
Olonia bourgoini sp. nov.
This species can be recognized by the following combination of characters:
(3) anal tube of male oblong with posterior margin emarginate ( Fig. 5BView Fig. 5)
(4) centroventral part of gonostyli with long laminate process ( Fig. 5A, CView Fig. 5)
(5) laterodorsal part of gonostyli with falcate process directed centroventrally ( Fig. 5A, C –DView Fig. 5) (6) rather large size: 9–10 mm
This species is dedicated to Prof. Dr Thierry Bourgoin (MNHN), who collected the specimens of the type series.
Holotype AUSTRALIA • ♁; Queensland, Chillagoe Haunted Cave ; 17°06′ S, 144°25′ E; “Muséum Paris, Australie (Queensland) Près de Chilagoe Hounted Cave-Cave 1”, “S17°06′ E144°25′, 13.III.1997, A. Soulier- Perkins & Th. Bourgoin rec.”, “ QM-T244701 ”; QM.GoogleMaps
Paratypes AUSTRALIA • 1 ♁; same collection data as for holotype; MNHN • 1 ♀; “ Australie, Chilagoe GPS 300 , 11/ 12-III-1997, Th. Bourgoin réc.”, “Muséum Paris, piège lumineux, Th. Bourgoin réc.”; MNHN .
On the labels of these specimens, “Chilagoe” and “Hounted” should be spelled “Chillagoe” and “Haunted”, respectively.
MEASUREMENTS AND RATIOS. LT: ♁ (n = 1): 9.15 mm; ♀ (n = 1): 9.7 mm; BV/LV = 4.2; BF/LF = 1.75; LP+LM/BT = 0.7; Ltg/BTg = 2.4; LW/BW = 1.77.
HEAD ( Fig. 4A –DView Fig. 4). Vertex concave with anterior and posterior margins parallel, curved; variegated brown and yellow-brown with darker marking at lateral angles. Frons pale yellowish variegated with brown, with superolateral and dorsal margins broadly bordered with black and 2 transverse, aligned black markings above middle. Clypeus elongate, pale yellowish, with basal, black, horseshoe-shaped marking and oblique brown lines on sides. Genae pale yellowish, slightly darker around eyes. Labium dark brown, reaching metacoxae. Antennae dark brown, paler dorsally; scape short, ring-shaped; pedicel subcylindrical, slightly narrowing towards apex.
THORAX ( Fig. 4A –DView Fig. 4). Pronotum brown variegated with yellowish and with blackish marking; obsolete median carina and 2 small impressed points on disc. Lateral fields of prothorax brown, turning to pale yellowish ventrally. Mesonotum brown variegated with yellowish and black markings along median carina and along external side of peridiscal carinae; median and peridiscal carinae weakly marked; median carina stopping before scutellum; slight impression before scutellum. Red ventrally. Tegulae dark brown, paler dorsally.
TEGMINA ( Fig. 4A, CView Fig. 4). Brown variegated with yellowish; broad apical band and irregular markings along basal and costal margins black; pale yellow line on vein A1 at half length of clavus; large triangular white marking on costal margin on nodal line; white spot at apicosutural angle. Maximum breadth at nodal line; costal margin slightly sinuate; apical margin obliquely rounded.
POSTERIOR WINGS ( Fig. 4EView Fig. 4). Black-brown with darker marking at base of apical half along costal margin; elongate, transverse, with triangular white marking at apicocostal angle, extending on 6 cells; elongate orange marking between anal fold and vein CuP at ¾, not reaching margin. Margin of anal area sinuate; sutural margin with 2 clefts, cubital one slightly marked.
LEGS ( Fig. 4A –DView Fig. 4). Pro- and mesocoxae yellowish. Pro- and mesofemora yellowish with some brown markings and with black markings near apex. Pro- and mesotibiae yellowish with 3 ring-shaped black markings, larger one near apex. Pro- and mesotarsi brown with basal half of third tarsomere yellowish. Metacoxae and metafemora reddish yellow. Metatibiae yellowish with 3 lateral and 8 apical blackbrown spines. Metatarsi yellowish with a ventral row of 6 black spines on first tarsomere.
ABDOMEN. Bright red with genital segments black-brown.
MALE GENITALIA ( Fig. 5View Fig. 5). Posterior margin of pygofer in lateral view strongly sinuate, strongly roundly projecting at dorsal ½, narrow ventrally ( Fig. 5A, CView Fig. 5). Anal tube oblong, 3.15 times as long as broad, slightly curved ventrally in lateral view; lateral margins subparallel and slightly curved ventrally; apical margin emarginate in middle ( Fig. 5A –BView Fig. 5). Gonostyli fused to nearly half length of centroventral part and projecting posterodorsally ( Fig. 5A, CView Fig. 5). Centroventral part dorsoventrally flattened basally, progressively twisted and laminate towards apex, broader apically in lateral view, with apical margin concave, apicodorsal angle pointed and apicoventral angle angularly rounded ( Fig. 5A, CView Fig. 5). Laterodorsal part of gonostyli curved centroventrally, falcate and slightly concave ventrally, with lateral process rather broad and shorter than spoon-shaped process ( Fig. 5A, C –DView Fig. 5). Dorsal portion of phallobase with elongate process on each side, pointing dorsally and slightly curved internally at base ( Fig. 5EView Fig. 5). Ventral portion of phallobase along lateral margin of phallus, elongate, curved internally and nearly merging together apically, directed posterodorsally ( Fig. 5E –FView Fig. 5). Phallus dorsoventrally flattened, lanceolate in dorsal view ( Fig. 5E –FView Fig. 5).
Similar to male but with frons entirely brown and with white markings of tegmina smaller ( Fig. 6View Fig. 6).
Distribution and biology
This species is currently recorded from a single location in tropical Queensland, near Chillagoe, in the Einasleigh Upland Savanna bioregion ( Fig. 3View Fig. 3). The specimens were collected in March.
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