Olonia guillaumei, Constant, 2018

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: 21-25

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Olonia guillaumei

sp. nov.

Olonia guillaumei   sp. nov.

urn:lsid:zoobank.org:act:26C5880F-0D15-409D-99C3- CA496382 View Materials C6FE

Figs 3 View Fig. 3 , 9–11 View Fig. 9 View Fig. 10 View Fig. 11


This species can be recognized by the following combination of characters:

(1) hind wings with conspicuous orange marking ( Figs 9E View Fig. 9 , 11E View Fig. 11 )

(2) pro- and mesofemora and tibiae largely brown ( Figs 9A –D View Fig. 9 , 11A –D View Fig. 11 )

(3) anal tube of male oblong, with posterior margin rounded ( Fig. 10B View Fig. 10 )

(4) centroventral part of gonostyli with long laminate process ( Fig. 10A, C View Fig. 10 )

(5) laterodorsal part of gonostyli with hooked process directed lateroventrally ( Fig. 10A, C –D View Fig. 10 ) (6) rather large size: 9.5–10 mm


This species is named after my son, Guillaume.

Type material

Holotype AUSTRALIA • ♁; NE Queensland, Bakers Blue Mt, 17 km W of Mt Molloy ; [16°42′ S, 145°09′ E]; “N.E. QLD, Bakers Blue Mt, 17 km W Mt Molloy, 800m, open For. 12.ix.1981, G. Monteith & D. Cook ”; QM. GoogleMaps  

Paratypes AUSTRALIA • 1 ♁; [17°20′26″ S, 144°40′37″ E]; “ Almaden , Chillagoe Dist., N. Q. Jan. 1932, W.D. Campbell ”, “ K64979 View Materials ”; AMS GoogleMaps   • 1 ♀; “Almaden, Chillagoe Dist., N. Q. March 1929, W.D. Campbell”, “K58965”; AMS   1 ♁; “Almaden, Chillagoe Dist., N. Q. June 1927, W.D. Campbell”, “K56631.”; RBINS GoogleMaps   • 1 ♁; [17°23′ S, 145°23′ E]; “ Herberton , Q., 23 Aug 1970, F. McDonald ”, “MJF Collection, MJF003398”; ASCU GoogleMaps   .


MEASUREMENTS AND RATIOS. LT: ♁ (n = 3): 9.9 mm (9.6–10.1); BV/LV = 4.15; BF/LF = 1.83; LP+LM/ BT = 0.66; Ltg/BTg = 2.5; LW/BW = 1.80.


HEAD ( Fig. 9A –D View Fig. 9 ). Vertex concave with anterior and posterior margins parallel, curved; yellowish variegated with brown and with black marking at lateral angles. Frons black-brown with mediobasal irregular marking yellowish variegated with brown. Clypeus elongate, brown with 2 short, black, longitudinal lines at base, with oblique yellowish lines on sides and with apex darker. Genae pale yellowish, slightly darker at place around eyes and with brown marking under antennae. Labium blackbrown, reaching metacoxae. Antennae dark brown; scape short, ring-shaped; pedicel subcylindrical, slightly narrowing towards apex.

THORAX ( Fig. 9A –D View Fig. 9 ). Pronotum brown variegated with yellowish, with blackish marking and with yellowish spot at lateral angles; slightly transversely wrinkled posteriorly; obsolete median carina and 2 small impressed points on disc. Lateral fields of prothorax dark brown. Mesonotum black-brown with reddish markings along posterior margin, median yellowish spot along anterior margin and at apex of scutellum; slightly transversely wrinkled; median and peridiscal carinae weakly marked; median carina stopping before scutellum; slight impression before scutellum. Red ventrally. Tegulae brown.

TEGMINA ( Fig. 9A, C View Fig. 9 ). Brown variegated with yellowish and black; irregular transverse row of whitish spots at basal ½; large triangular white marking on costal margin on nodal line; white spot at apicosutural angle. Maximum breadth at nodal line; costal margin sinuate; apical margin obliquely rounded.

POSTERIOR WINGS ( Fig. 9E View Fig. 9 ). Brown with apical ½ black; transverse, broad, subtriangular white marking at apicocostal angle, extending on 4 cells; large, elongate orange marking between anal fold and vein CuA at basal ½, not reaching margin. Margin of anal area slightly rounded; sutural margin with 2 clefts, cubital one slightly marked.

LEGS ( Fig. 9A –D View Fig. 9 ). Pro- and mesocoxae brown. Pro- and mesofemora black-brown with 2 obsolete yellowish rings. Pro- and mesotibiae dark brown with 3 obsolete ring-shaped yellowish markings, larger one near apex. Pro- and mesotarsi dark brown with basal half of third tarsomere paler. Metacoxae reddish brown; metafemora red with apex dark brown. Metatibiae brown, with 3 lateral spines yellowish basally and 8 apical, black-brown spines. Metatarsi dark brown with a ventral row of 6 black spines on first tarsomere.

ABDOMEN. Bright red with genital segments black-brown.

MALE GENITALIA ( Fig. 10 View Fig. 10 ). Posterior margin of pygofer in lateral view strongly sinuate, strongly roundly projecting at dorsal ½, narrow ventrally ( Fig. 10A, C View Fig. 10 ). Anal tube oblong, 3.3 times as long as broad, slightly curved ventrally in lateral view; lateral margins subparallel and slightly curved ventrally on apical ¾; apical margin rounded ( Fig. 10A –B View Fig. 10 ). Gonostyli fused to nearly half length of centroventral part and projecting posterodorsally ( Fig. 10A, C View Fig. 10 ). Centroventral part dorsoventrally flattened basally, progressively twisted and laminate towards apex, broader apically in lateral view, with apical margin slightly sinuate, apicodorsal angle pointed and apicoventral angle angularly rounded ( Fig. 10A, C View Fig. 10 ). Laterodorsal part of gonostyli curved lateroventrally, hooked, with lateral process rather broad and about as long as spoon-shaped process ( Fig. 10A, C –D View Fig. 10 ). Dorsal portion of phallobase with elongate process on each side, pointing dorsally and slightly internally ( Fig. 10E –F View Fig. 10 ). Ventral portion of phallobase along lateral margin of phallus on basal half, then under phallus, narrowing and bifid apically, directed posterodorsally ( Fig. 10E –F View Fig. 10 ). Phallus dorsoventrally flattened, elongate, with apical margin strongly emarginate in dorsal view ( Fig. 10E –F View Fig. 10 ).


Similar to male, but with frons brown turning to reddish-brown medioventrally; legs paler with yellowish rings more developed; posterior wings less contrasted, with apicocostal white marking narrower and orange marking less developed ( Fig. 11 View Fig. 11 ).

Distribution and biology

This species is currently recorded from a small area west of Mareeba in North Queensland ( Fig. 3 View Fig. 3 ), in the Einasleigh Upland Savanna bioregion. The specimens were collected in January, March, June, August and November; hence, the species may be present all year long.


Royal Belgian Institute of Natural Sciences


Agricultural Scientific Collections Unit