Olonia rylandae, 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 : 72-75

Olonia rylandae sp. nov.

urn:lsid:zoobank.org:act:1F0498E0-6DD9-48AD-AB8D-2369364963CE

Figs 3 , 45–46

Diagnosis

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

(1) hind wings without orange marking ( Fig. 45E )

(2) pro- and mesofemora and -tibiae mostly brown ( Fig. 45A–D )

(3) anal tube of male oblong, with posterior margin slightly concave and lateral margins sinuate ( Fig. 46B )

(4) centroventral part of gonostyli with elongate and narrow process strongly sinuate basally and with small apical hook pointing ventrally ( Fig. 46A, C )

(5) laterodorsal part of gonostyli with elongate and narrow process slightly curved lateroventrally ( Fig. 46A, C–D )

(6) rather small size: 7.7 mm

Etymology

This species is dedicated to Mrs Valry Ryland ( Magnetic Island , Queensland, Australia) in acknowledgement for all her help and involvement in documenting the natural history of species of Olonia .

Material examined

Holotype

AUSTRALIA • ♂; Queensland, Bathurst Head ; [14°16′ S, 144°12′ E]; “Bathurst Head, Q., Jan. 1927, Hale & Tindale”; dissected, right anterior leg missing, right posterior wing mounted; SAM.

Description

MEASUREMENTS AND RATIOS. LT: ♂ (n = 1): 7.7 mm; BV/LV = 4.38; BF/LF = 1.7; LP+LM/BT = 0.67; LTg/BTg = 2.5; LW/BW = 2.0.

Male

HEAD ( Fig. 45A–D ). Vertex concave, with anterior and posterior margins parallel, curved; brown, slightly wrinkled. Frons uniformly brown, slightly wrinkled. Clypeus elongate, brown. Genae yellowish with brown markings around eyes and under antennae. Labium dark brown, reaching metacoxae. Antennae black-brown; scape short, ring-shaped; pedicel subcylindrical, slightly narrowing towards apex.

THORAX ( Fig. 45A–C ). Pronotum brown with small yellowish spot on each side; slightly wrinkled; obsolete median carina and 2 small impressed points on disc. Lateral fields of prothorax brown. Mesonotum brown; yellowish spot on middle of anterior margin and at apex of scutellum; slightly rugulose; median and peridiscal carinae weakly marked; median carina stopping before scutellum; slight impression before scutellum. Red ventrally. Tegulae brown.

TEGMINA ( Fig. 45A, C ). Brown, slightly variegated with yellowish; pale yellowish marking on vein A1 at midlength of clavus; marked with black along costal margin, more broadly so on posterior half, and along posterior margin. Triangular white marking on costal margin on nodal line; no white spot at apicosutural angle. Costal and sutural margins subparallel; costal margin slightly sinuate; apical margin obliquely rounded.

POSTERIOR WINGS ( Fig. 45E ). Brown, paler on anal area and with large blackish area reaching apical margin; elongate, transverse, subtriangular white marking at apicocostal angle, extending on 3–4 cells. Margin of anal area slightly sinuate; sutural margin with 1 cleft, cubital one nearly not marked.

LEGS ( Fig. 45A–D ). All coxae brown. Pro- and mesofemora dark brown. Pro- and mesotibiae brown, turning blackish apically, and with 3 very obsolete paler rings. Pro- and mesotarsi brown, with basal half of third tarsomere paler. Metafemora pale brown with apex darker. Metatibiae brown, with 3 lateral spines paler 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. 46 ). Posterior margin of pygofer in lateral view strongly sinuate, rather angularly, roundly projecting at dorsal ½ and rather broad ventrally ( Fig. 46A, C ). Anal tube oblong, 2.9 times as long as broad, broader at apical ¾, with lateral margins sinuate and apical margin concave; lateral margins curved ventrally on apical ¾; slightly curved ventrally near base in lateral view ( Fig. 46A–B ). Gonostyli fused on slightly less than basal half of length of centroventral part and projecting posteriorly ( Fig. 46A, C ). Centroventral part broad and dorsoventrally flattened on basal half, then strongly narrowing into elongate, narrow process, strongly sinuate basally in lateral view and ending in narrow hook curved anteroventrally ( Fig. 46A, C ). Laterodorsal part of gonostyli elongate and slightly curved posteroventrally, posteriorly slightly surpassing level of centroventral part; lateral process elongate, projecting posterolaterally, slightly concave dorsally and longer than spoon-shaped process ( Fig. 46A, C–D ). Dorsal portion of phallobase with hooked process on each side, narrowing in 2 steps from base to apex, directed posterocentrally and with apex pointing dorsally ( Fig. 46E–F ). Ventral portion of phallobase elongate and narrow, curved posteroventrally ( Fig. 46E–F ). Phallus dorsoventrally flattened, medially concave, broadening towards apex and emarginate apically ( Fig. 46E–F ).

Female

Unknown.

Distribution and biology

This species is only known from a single male from Bathurst Head, a headland covered with open forest close to Cape Melville on the eastern coast of Cape York Peninsula ( Fig. 3 ), in the Cape York Peninsula Tropical Savanna bioregion. It was collected in January, nearly one century ago.

Figures

Fig. 3. Olonia spp. and Stalobrachys alboapicata gen. et comb. nov. (Jacobi, 1928), distribution maps. A. Topographic map. B. Bioregion map.

Fig. 45. Olonia rylandae sp. nov., holotype, ♂. A. Habitus, dorsal view. B. Habitus, ventral view. C. Habitus, lateral view. D. Habitus, normal view of frons. E. Posterior wing.

Fig. 46. Olonia rylandae sp. nov., holotype, ♂, genitalia. A. Pygofer, anal tube and gonostyli, left lateral view. B. Anal tube, dorsal view. C. Pygofer and gonostyli, ventral view. D. Laterodorsal part of left gonostylus, dorsal view. E. Aedeagus, left lateral view. F. Aedeagus, dorsal view. Abbreviations: An = anal tube; G = gonostyli; Py = pygofer.