Revision of the Eurybrachidae XVIII. The Australian genus Olonia Stål, 1862: Four new species, new records and biological data (Hemiptera: Fulgoromorpha) Author Constant, Jérôme text European Journal of Taxonomy 2024 2024-06-21 941 1 1 51 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2579/11729 journal article 298987 10.5852/ejt.2024.941.2579 64c70153-d705-4b5d-9ea0-5e8b21a2b3cc 2118-9773 12533699 670AC25F-B24F-46CC-B92F-4A930A757A13 Olonia lindae sp. nov. urn:lsid:zoobank.org:act: D1AD7411-52D4-4DD7-A16F-3614F1C16D26 Figs 6A , 18–23 Diagnosis The species can be recognized by the following combination of characters: (1) hind wings black without orange-brown marking in middle or white marking at apicocostal angle ( Figs 18E , 20E ) except some paler specimens with orange-brown marking in middle portion and white marking at apicocostal angle extending over 1–3 cells; (2) pro- and mesofemora and tibiae largely black-brown ( Figs 18A–D , 20A–D ); (3) anal tube of male spatulate, constricted at anal opening and with posterior margin rounded ( Fig. 19E ); (4) centroventral part of gonostyli with an elongate process nearly straight caudad and apically pointed and slightly curved laterad ( Fig. 19A–C ); (5) laterodorsal part of gonostyli pointed apically and moderately curved posteroventrad, gently tapering from base towards apex, slightly surpassing half-length of centroventral part ( Fig. 19A–C ); (6) rather small to medium size: 6.8–8.4 mm . Differential diagnosis The closest species are O. aschei sp. nov. and O. jackiei sp. nov. , from which O. lindae sp. nov. differs by the processes of the laterodorsal part of the gonostyli moderately curved and directed posterolaterad (strongly curved and pointing laterad in O. aschei ; distally sinuate and directed mesocaudad in ventral view in O. jackiei ). Etymology The species epithet is a patronym dedicated to my wonderful partner Linda Semeraro who found all the adult specimens from Undara during our 2022 expedition. Type material Holotype AUSTRALIA • ♂ ; Queensland , Undara Volcanic National Park , Kalkani Crater ; 18°13′11″ S , 144°40′02″ E ; 3 May 2022 ; elev. 900–950 m ; J. Constant and L. Semeraro leg.; Leopold III Funds exped.; QM . Paratypes AUSTRALIA – Queensland • 1 ♂ , 1 ♀ ; same data as for holotype; QM • 1 ♂ , 1 ♀ ; same data as for holotype; RBINS • 2 ♂♂ ; Forty Mile Scrub National Park ; 18°06′36″ S , 144°49′31″ E ; 4–5 May 2022 ; elev. 800 m ; J. Constant and L. Semeraro leg.; Leopold III Funds exped.; QM • 1 ♂ , 1 ♀ ; same data as for preceding; RBINS • 1 ♂ ; Talaroo Station , about 30 km from homestead, Van Lee Road, stop 13 ; 18°1.198′ S , 143°48.004′ E ; 25 Apr. 2018 ; elev. 406 m ; D. Rentz leg.; near pond; MLM 02246; DPIRD • 1 ♂ ; Talaroo Station , boundary fence line, 0.7 km E from road, stop 14 ; 18°9.063′ S , 143°57.534′ E ; 26 Apr. 2018 ; elev. 367 m ; D. Rentz leg.; MLM 02228; DPIRD • 2 ♂♂ ; Undara Lava flow, between Mt Garnet and Mt Surprise, Rosella Plains Station, surface around Bayliss Cave ; [ 18°13′58.4″ S , 144°33′42.6″ E ]; 17 Jan. 1989 ; M. Asche and H. Hoch leg.; Au23; MFNB . Additional material examined AUSTRALIA – Queensland • 7 nymphs; Undara Volcanic National Park , Kalkani Crater ; 18°13′11″ S , 144°40′02″ E ; 3 May 2022 ; elev. 900–950 m ; J. Constant and L. Semeraro leg.; Leopold III Funds exped.; QM • 6 nymphs ; same data as for preceding; RBINS • 8 nymphs ; Forty Mile Scrub National Park ; 18°06′36″ S , 144°49′31″ E ; 4–5 May 2022 ; elev. 800 m ; J. Constant and L. Semeraro leg.; Leopold III Funds exped.; QM • 7 nymphs ; same data as for preceding; RBINS . Description MEASUREMENTS AND RATIOS . LT: ♂ (n = 9): 7.2 mm (6.8–7.7); ♀ (n = 3): 8.4 (8.2–8.6) mm; BV/LV = 4.12; BF/LF = 1.70; LP+LM/BT = 0.63; Ltg/BTg = 2.23; LW/BW = 2.15. Male HEAD ( Fig. 18A–D ). Vertex slightly concave with anterior and posterior margins parallel, curved; black-brown; median carina obsolete. Posterior part of head with yellowish markings. Frons uniformly black-brown. Genae black-brown with paler markings along anterior margin behind lateral expansion of frons. Clypeus elongate, entirely black-brown. Labium black-brown, surpassing mesocoxae. Antennae black-brown; scape short, ring-shaped; pedicel subcylindrical, slightly narrowing towards apex. THORAX ( Fig. 18A–D ). Pronotum black-brown; slightly wrinkled; two small impressed points on disc slightly marked. Lateral fields of prothorax coloured as pronotum. Mesonotum black-brown; yellowish brown at apex of scutellum and in middle of anterior margin; median and peridiscal carinae weakly marked; median carina ending before scutellum; slight impression before scutellum. Red ventrally. Tegulae brown. TEGMINA ( Fig. 18A, C ). Dark brown with main veins slightly reddish, sometimes slightly paler in middle portion; yellowish brown marking on vein A1 at midlength of clavus; black area along costal margin, broader on posterior half and along posterior margin; triangular white marking on costal margin on nodal line either present, extending over 2–7 cells, or (often) missing; specimens with well developed white triangle often with some small white spots at apicosutural angle. Costal and sutural margins subparallel; costal margin slightly sinuate; apical margin obliquely rounded with preapical oblique depression. POSTERIOR WINGS ( Fig. 18E ). In darker specimens, black, slightly paler on anal area; no orange-brown marking in middle portion; no white marking at apicocostal angle. In paler specimens (with well developed white triangle on tegmina), orange-brown marking in middle portion between veins CuP and A1; white marking at apicocostal angle extending over 1–3 cells. Margin of anal area slightly sinuate; sutural margin with two clefts, cubital one weakly marked. LEGS ( Fig. 18A–D ). Pro- and mesocoxae dark brown. Pro- and mesofemora and corresponding tibiae black with few small reddish brown markings. Pro- and mesotarsi black-brown with basal half of third tarsomere slightly paler. Metacoxae red; metafemora reddish brown, black-brown distally. Metatibiae dark brown to reddish brown (in paler specimens), darker towards apex, with three lateral spines, and 9 apical black spines. Metatarsi brown with a ventral row of 6–8 black spines on first tarsomere. Metatibiotarsal formula: (3) 9/6–8/0. ABDOMEN . Bright red with genital segments black-brown. MALE TERMINALIA ( Fig. 19 ). Posterior margin of pygofer ( Py ) in lateral view sinuate, moderately roundly projecting at dorsal ¼, moderately broad ventrally ( Fig. 19A–B ). Anal tube ( An ) spatulate, 2.2 times as long as broad, laterally constricted at level of epiproct ( ep ), very slightly curved ventrally in lateral view; lateral margins slightly curved ventrally on distal ⅔; apical margin rounded ( Fig. 19A–E ). Gonostyli ( G ) fused on basal 1/5 of length of centroventral part ( cvp ) and projecting posteriorly ( Fig. 19A–F ). Centroventral part of gonostyli moderately broad and dorsoventrally flattened on basal ¼, then bulged and strongly sinuate dorsad, then caudad in lateral view, narrowing into an elongate process nearly straight in ventral as well as in lateral view, regularly gently tapering towards apex; apex pointed and slightly curved laterad ( Fig. 19A–C ). Laterodorsal part ( ldp ) of gonostyli robust, pointed apically and moderately curved posteroventrad in lateral view, gently tapering from base towards apex, slightly surpassing half-length of centroventral part, with apex reaching under the level of centroventral part in lateral view; in ventral view, directed mesad in basal portion, then distal portion curved laterad; lateral process ( lp ) elongate, about as long as spoon-shaped process ( ssp ), projecting laterally and slightly curved anteriorly ( Fig. 19A–E ). Dorsal portion of phallobase ( dpp ) with elongate process on each side, curved mesocaudad in dorsal view, in lateral view gently tapering from base to apex, directed posterodorsad with distal portion curved dorsad, forming a moderate hook ( Fig. 19G–I ). Ventral portion of phallobase strongly widening from base towards apex, trilobed in dorsal view, with median lobe surpassing phallus ( Fig. 19I ). Phallus dorsoventrally flattened, rather broad, with apical margin emarginate in middle ( Fig. 19G–I ). Connective ( cv ) elongate and narrow, without tectiductus ( Fig. 19G–H ). Fig. 18. Olonia lindae sp. nov. , holotype, ♂ (QM). A–D . Habitus. A . Dorsal view. B . Ventral view. C . Lateral view. D . Perpendicular view of frons. E . Posterior wing. Fig. 19. Olonia lindae sp. nov. , holotype, ♂ (QM), terminalia. A–F . Pygofer, anal tube and gonostyli. A . Left lateral view. B . Ventral view. C . Dorsolateral view. D . Caudal view. E . Dorsal view. F . Laterodorsal view. G–J . Aedeagus and connective. G . Laterodorsal view. H . Lateral view. I . Dorsal view. J . Ventral view. Abbreviations: see Material and methods. Fig. 20. Olonia lindae sp. nov. , paratype, ♀ (QM). A–D . Habitus. A . Dorsal view. B . Ventral view. C . Lateral view. D . Perpendicular view of frons. E . Posterior wing. Fig. 21. Olonia lindae sp. nov. , Forty Mile Scrub National Park, 5 May 2022. A . Male, dorsal view. B . Male, lateral view. C . Female, laterodorsal view. D . Nymph, anterolateral view. E . Nymph, dorsal view. F . Habitat. Female Similar to darker males, with small triangular white marking on costal margin on nodal line of tegmina, often absent; posterior wings without orange-brown marking in middle portion between veins CuP and A1, and white marking at apicocostal angle, absent or very weakly marked ( Fig. 20 ). Fig. 22. Olonia lindae sp. nov. , Undara Volcanic National Park. A . Habitat, 30 April 2022. B . Pair (male on the left, female on the right) on young stem of Eucalyptus sp. ( Myrtaceae ). C . View of the young stem on the corresponding trunk. Paler forms might exist but were not observed in this study. Distribution and biology The species is known from a few localities in North Queensland , in the Einasleigh Upland Savanna bioregion ( Fig. 6A ). In Undara National Park, two adults and numerous nymphs were collected near Kalkani Crater, by sweeping herbaceous plants in open Eucalyptus L’Hér. woodland ( Fig. 22A ) while a pair was found on a young stem of a Eucalyptus tree ( Fig. 22B–C ); they were not observed feeding. In Forty Mile Scrub National Park, males, females and nymphs ( Fig. 21A–E ) were collected by sweeping a large mown area along the main road, where the following four host plants were identified, all in the family Fabaceae : Stylosanthes scabra Vogel ( Fig. 23A–C ), Chamaecrista rotundifolia (Pers.) Greene ( Fig. 23D–G ), Rhynchosia minima (L.) DC. var. minima ( Fig. 23H–J ), and Indigofera hirsuta L. ( Fig. 23K–M ). The specimens of this species were collected in January, April and May; nymphs at all stages were observed in May.