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: 75-80
treatment provided by
Olonia soulierae sp. nov.
This species can be recognized by the following combination of characters:
(3) anal tube of male narrow and parallel-sided on basal ½, then ovate with posterior margin notched ( Fig. 48BView Fig. 48)
(4) centroventral part of gonostyli with long and narrow process, slightly sinuate basally and with apical hook pointing dorsally ( Fig. 48A, CView Fig. 48)
(5) laterodorsal part of gonostyli with hooked process curved lateroventrally ( Fig. 48A, C –DView Fig. 48)
(6) large size: 9.4–11.2 mm
This species is dedicated to Dr Adeline Soulier-Perkins (MNHN), who collected a part of the type series.
Holotype AUSTRALIA • ♁; Queensland, near 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-244702”; QM.GoogleMaps
Paratypes AUSTRALIA • 2 ♁♁, 4 ♀♀; same collection data as for holotype; MNHN • 1 ♁, 1 ♀; same collection data as for holotype; RBINS • 1 ♀; “ Australia: Qld., Chillagoe Caves Nat. Park , turnoff to Royal Arch Cave , Au 97 – 49, 60, 63, M. Asche & H. Hoch, 19.III.1997 ”; ZMHB.
MEASUREMENTS AND RATIOS. LT: ♁ (n = 3): 9.8 mm (9.4–10.1); ♀ (n = 5): 10.8 mm (10.5–11.2); BV/LV = 4.0; BF/LF = 1.71; LP+LM/BT = 0.71; LTg/BTg = 2.1–2.3; LW/BW = 1.72.
HEAD ( Fig. 47A –DView Fig. 47). Vertex concave, with anterior and posterior margins parallel, curved; dark brown variegated with yellowish in middle. Frons black-brown, slightly tinged with 2 transverse, irregular, variegated yellowish markings, more dorsal one not reaching sides. Clypeus elongate, dark reddish brown with 2 short, black, longitudinal lines at base, with apex darker. Genae yellowish with brown markings around eyes and under antennae. Labium brown, reaching metacoxae. Antennae black; scape short, ring-shaped; pedicel subcylindrical, slightly narrowing towards apex.
THORAX ( Fig. 47A –CView Fig. 47). Pronotum dark brown with some yellowish markings laterally; slightly transversely wrinkled posteriorly; obsolete median carina and 2 small impressed points on disc. Lateral fields of prothorax brown. Mesonotum dark brown with reddish markings along posterior margin, median yellowish spot along anterior margin and at apex of scutellum; slightly rugulose; median and peridiscal carinae weakly marked; median carina ending before scutellum; slight impression before scutellum. Red ventrally. Tegulae brown.
TEGMINA ( Fig. 47A, CView Fig. 47). Dark brown with small yellowish or reddish spots; bigger, whitish, slightly transverse spot on middle of clavus; large triangular white marking on costal margin on nodal line and a smaller one anterior to it; white marking at apicosutural angle. Maximum breadth at nodal line; costal margin slightly sinuate; apical margin obliquely rounded.
POSTERIOR WINGS ( Fig. 47EView Fig. 47). Brown with apical ½ black-brown; transverse, subtriangular white marking at apicocostal angle, extending on 5 cells; sutural margin broadly bordered with yellowish on basal half; orange marking between anal fold and vein CuA at about half length. Margin of anal area sinuate; sutural margin with 2 clefts, cubital one slightly marked.
LEGS ( Fig. 47A –DView Fig. 47). Pro- and mesocoxae reddish brown. Pro- and mesofemora black-brown with yellowish spots marking 2 obsolete rings. Pro- and mesotibiae black-brown with 3 obsolete ring-shaped yellowish markings, larger one near apex. Pro- and mesotarsi dark brown, with basal half of last segment yellow-brown. Metacoxae reddish; metafemora reddish with apex brown. Metatibiae brown, with 3 lateral spines yellowish basally and 8 apical, black-brown spines. Metatarsi brown with a ventral row of 6 black spines on first tarsomere.
ABDOMEN. Bright red with genital segments black-brown.
MALE GENITALIA ( Fig. 48View Fig. 48). Posterior margin of pygofer in lateral view strongly sinuate, roundly projecting at dorsal ½, rather broad ventrally ( Fig. 48A, CView Fig. 48). Anal tube elongate, 2.25 times as long as broad, with basal ½ parallel-sided and narrower, then broadly ovate with posterior margin notched; slightly sinuate in lateral view; lateral margins slightly curved ventrally on apical ¾ ( Fig. 48A –BView Fig. 48). Gonostyli fused to nearly half length of centroventral part and projecting posteriorly ( Fig. 48A, CView Fig. 48). Centroventral part dorsoventrally flattened on basal ½, then abruptly narrowing and forming strongly elongated and narrow process, slightly diverging and ending in a small hook pointing dorsally; process slightly sinuate in lateral view ( Fig. 48A, CView Fig. 48). Laterodorsal part of gonostyli curved lateroventrally, hooked, with lateral process rather broad and moderately elongated, about as long as spoon-shaped process ( Fig. 48A, C –DView Fig. 48). Dorsal portion of phallobase with elongate process on each side, strongly narrowing on basal half in lateral view, then strongly hooked, pointing dorsally and slightly incurved ( Fig. 48E –FView Fig. 48). Ventral portion of phallobase along lateral margin of phallus on basal half, elongate and supassing phallus, crossing after it ( Fig. 48E –FView Fig. 48). Phallus dorsoventrally flattened, elongate, narrowing from base to apex ( Fig. 48E –FView Fig. 48).
Similar to male, but darker; frons entirely black-brown; white markings on tegmina smaller; blackbrown area of posterior wings larger, orange marking reduced ( Fig. 49View Fig. 49).
Distribution and biology
This species is known from a series of ten specimens collected in Chillagoe in North Queensland ( Fig. 3View Fig. 3), in the Einasleigh Upland Savanna bioregion. Nine specimens were collected on a single day in March; hence, the species is probably not scarce in its habitat. No host plant is recorded.
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