Olonia soulierae Constant, 2018

Constant, Jérôme, 2024, Revision of the Eurybrachidae XVIII. The Australian genus Olonia Stål, 1862: Four new species, new records and biological data (Hemiptera: Fulgoromorpha), European Journal of Taxonomy 941 (1), pp. 1-51 : 43-46

Olonia soulierae Constant, 2018

Figs 26–27

Olonia soulierae Constant, 2018: 11 (listed), 12 (keyed), 75 (description), figs 3 (distribution map), 47–49 (male, female, male terminalia).

Diagnosis

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

(1) hind wings with orange marking ( Constant 2018: figs 47e, 49e);

(2) pro- and mesofemora and tibiae largely black-brown ( Constant 2018: figs 47a–d, 49a–d);

(3) anal tube of male narrow and parallel-sided on basal ⅓, then ovate with posterior margin notched ( Constant 2018: fig. 48b);

(4) centroventral part of gonostyli with long and narrow process, slightly sinuate basally and with apical hook pointing dorsally ( Constant 2018: fig. 48a, c);

(5) laterodorsal part of gonostyli with hooked process curved lateroventrally ( Constant 2018: fig. 48a, c–d);

(6) large size: 9.4–11.2 mm.

Material examined

AUSTRALIA – Queensland • 2 ♂♂, 8 ♀♀, 1 nymph; Chillagoe ; 17°08′55″ S, 144°31′43″ E; 7–11 May 2022; elev. 400–500 m; J. Constant and L. Semeraro leg.; Leopold III Funds exped.; QM • 2 ♂♂, 7 ♀♀; same data as for preceding; RBINS • 21 ♂♂, 16 ♀♀, 4 nymphs; same data as for preceding; on Erythrophleum chlorostachys ( Fabaceae ); QM • 21 ♂♂, 16 ♀♀, 4 nymphs; same data as for preceding; RBINS • 1 ♂, 1 ♀; same data as for preceding; on Crotalaria medicaginea ( Fabaceae ); QM • 1 ♂; same data as for preceding; RBINS • 3 ♂♂, 2 ♀♀, 1 nymph; same data as for preceding; on Sesbania cannabina ( Fabaceae ); QM • 2 ♂♂, 1 ♀, 1 nymph; same data as for preceding; RBINS • 4 ♂♂, 1 ♀; same data as for preceding; on Albizia sp. ( Fabaceae ); QM • 3 ♂♂; same data as for preceding; RBINS • 1 ♂, 1 ♀, 1 nymph; same data as for preceding; on Alstonia actinophylla ( Apocynaceae ); QM • 1 ♂, 1 nymph; same data as for preceding; RBINS • 2 ♂♂, 2 ♀♀; Chillagoe, surface around Ryan Creek Tower; 17°08′14.7″ S, 144°26′41.7″ E; 14 Jun. 1987; M. Asche and H. Hoch leg.; A15; MFNB • 7 ♂♂, 4 ♀♀; Chillagoe Caves National Park, turnoff to Royal Arch Cave; 20 Mar. 1997; M. Asche and H. Hoch leg.; Au 97-49, 60, 63; MFNB • 1 ♂, 2 ♀♀; same data as for preceding; 17 Mar. 1997; MFNB • 2 ♀♀; same data as for preceding; 19 Mar. 1997; MFNB • 3 ♂♂, 2 ♀♀; S of Chillagoe, Walkunder Towers , surface; 18 Mar. 1997; M. Asche and H. Hoch leg.; Au 97-54; MFNB • 1 ♂, 1 ♀; Chillagoe , around hospital; 12 Mar. 1997; M. Asche and H. Hoch leg.; Au 97-35; MFNB • 2 ♂♂, 3 ♀♀; Chillagoe Caves National Park, Hounted Tower ; 12–13 Mar. 1997; M. Asche and H. Hoch leg.; Au 97-36, 38; sweeping shrubs; MFNB • 1 ♀; Chillagoe, Mungana Caves National Park, surface around Carpentaria Cave; [17°05′31.4″ S, 144°23′51.4″ E]; 12 Jun. 1987; M. Asche and H. Hoch leg.; A12; MFNB • 1 ♂; Chillagoe , around caravan park; 2–7 Jan. 1989; M. Asche and H. Hoch leg.; Au6,8,9,11; at light; MFNB • 1 ♂, 1 ♀; Chillagoe Caves National Park , Royal Arch area , Bluff Lookout ; 17 Mar. 1997; M. Asche and H. Hoch leg.; Au 97-48; MFNB • 1 ♀; Chillagoe Caves National Park, Royal Arch area , fossil site; 19 Mar. 1997; M. Asche and H. Hoch leg.; Au97-57; MFNB .

Distribution and biology

The species was found in numbers in Chillagoe, which is its type locality ( Constant 2018). The specimens were collected from a number of host plants in the families of the Fabaceae ( Erythrophleum chlorostachys , Crotalaria medicaginea Lam. , Sesbania cannabina (Retz.) Poir. and Albizia sp. ) and Apocynaceae Juss. ( Alstonia actinophylla (A.Cunn.) K.Schum. ) ( Figs 26–27 ). Erythrophleum chlorostachys seems to be a main host of this species: many more specimens were observed but not collected, and during the field work, the tree species was nicknamed the “ Olonia tree”. The species is clearly polyphagous as nymphs were observed on all of the listed plant species. Nymphs at all stages were observed together with the adults, which may mean that adults of the species are present all year long.

Figures

Fig. 26. Olonia soulierae Constant, 2018, live specimens, habitat and host plants, Chillagoe, 7 May 2022. A–E. Host plant: Erythrophleum chlorostachys (F.Muell.) Baillon, 1870 (Fabaceae). A. Male, dorsal view. B. Female, dorsal view. C. Habitat and close-up of trunk. D. Leaves, underside. E. Leaves, upper side. F–J. Host plant: Albizia sp. (Fabaceae). F–H. Male on stem. I. Habitat and general view of tree. J. Leaves.

Fig. 27. Olonia soulierae Constant, 2018, live specimens, habitat and host plants, Chillagoe, 7 May 2022. A–F. Host plant: Sesbania cannabina (Retz.) Poir. (Fabaceae). A. Male, dorsal view. B. Female, dorsal view. C. Nymph, lateral view. D. Male on leaf. E. Habitat and general view of tree. F. Leaves. G–I. Host plant: Crotalaria medicaginea Lam. (Fabaceae). G. Male on stem. H. Leaves. I. Seedpods. J–L. Host plant: Alstonia actinophylla (A.Cunn.) K.Schum. (Apocynaceae). J. Male on trunk. K. Detail of trunk. L. Leaf.