Austrogymnocnemia lineata New, 1985

Machado, Renato Jose Pires & Oswald, John David, 2020, Morphological phylogeny and taxonomic revision of the former antlion subtribe Periclystina (Neuroptera: Myrmeleontidae: Dendroleontinae), Zootaxa 4796 (1), pp. 1-322 : 120-123

Austrogymnocnemia lineata New, 1985

( Figs. 51 , 54–55 )

Austrogymnocnemia lineata New, 1985:21 (OD); New 1996:67 (cat); Stange 2004:99 (cat); Oswald 2018 (cat).

Diagnosis. Tibial spurs absent; male gonarcus with anterior margin acute; male paramere with apical hook absent and anterior margin acute; female posterior gonapophysis with tip enlarged and rounded; body colour mostly dark; forewing mediocubital area with a continuous dark line.

Description. Lengths: forewing: 20–21 mm; hind wing: 17–18 mm.

Head ( Figs. 54 a–b): Labrum pale; set with a line of elongate setae. Clypeus pale with two lateral brown spots dorsally; set with some elongate black setae. Frons shiny black, except for ventral corners pale, covered with few short black setae. Gena pale. Vertex raised; in anterior view pale, with five central dark brown spots; in dorsal view mostly pale with two central perpendicular dark brown lines and two black marks posterolaterally; covered with short black setae. Ocular setae absent. Antennae clubbed; elongate, about twice longer than pronotum; distance between antennae wider than scape width; in general, anterior surface pale and posterior surface dark brown, but on basal segments part of posterior surface pale and in some subapical segments anterior surface has dark brown areas; torular membrane pale; flagellomeres almost as long as wide at base, but apical ones much wider than long; set with short black setae. Mandibles mostly brown, with tip black. Palpi, maxillary and labial mostly pale with dark brown marks on basal segments; apical labial palpomere fusiform, palpimacula opening oval-shaped, located medially.

Thorax ( Fig. 54b ): Pronotum about as long as wide; posterior margin about as wide as anterior; subapical furrow present; dark brown except for two pale longitudinal lines laterally; beset with short black setae, some long black setae on borders, and some long white setae on anterior margin. Mesonotum mostly dark brown with two longitudinal pale lines around central area; covered with short black setae. Metanotum dark brown with irregular pale spots around midline; set with few short black setae. Pterothoracic pleura dark brown with some pale areas on borders of sclerites; covered with white setae; Miller’s organ present.

Wings ( Fig. 54c ): Rather narrow with tip acute; anterior Banksian line present in both wings, posterior present only in the forewing; veins mostly dark brown, but some veins intercalated with white areas, most of the crossveins white with brown punctuations on the base of the setae. Male pilula axillaris present. Forewing membrane mostly hyaline with some brown marks on base of hypostigmatic cell, subcostal area, and posterior margin; mediocubital area totally brown and extending over anterior Banksian line; area surrounding mediocubital area brown infuscated, mainly at cubital area; CuA fork located about same level of RP origin; three presectoral crossveins; subcostal veinlets simple; posterior area narrower than prefork area; prefork area with few longitudinal crossveins. Hind wing membrane mostly hyaline except for a small brown mark around anterior Banksian line and another on rhegmal area; MP fork located near RP origin; subcostal veinlets simple; one presectoral crossvein.

Legs ( Figs. 54 a–b): All pairs of legs, femur elongate (> 2x length of coxa); femur slightly longer than tibia, tarsi and tibia about same size; tibial spurs absent; T2, T3 and T4 about same size, T1 and T5 about same size but near twice longer than T2; claws about half of T5 length; all segments set with short white setae, and some long setae at femur base; femur, tibia and tarsi set with short black setae, and scattered long black setae; T5 ventrally with two rows of thick, long, black setae. Proleg sense hair absent; tibia with antennal cleaning setae ventroapically; coxa dark brown with pale spots on external surface, trochanter light brown, femur dark brown with basal internal surface pale, tibia dark brown with three pale rings; tarsi dark brown, except for T1 base pale. Mesoleg with same colour pattern of proleg. Metaleg with femur, tibia and T1 slightly longer than in other legs; colour pattern similar to anterior legs, except for femur and tarsi entirely dark brown, and tibia with internal surface dark brown and external pale except for base and tip dark brown.

Abdomen: Dark brown. Tergites set with short black setae and sternites covered with white setae.

Male Terminalia ( Figs. 55 a–d): Ectoproct posterior margin rounded in lateral view, set with elongate black setae. 9 th sternite very short, with anterior margin concave and posterior straight in ventral view; set with elongate black setae, longer than the sternite. Gonarcus very broad, arched, with anterior margin thin and elongate in lateral view. Mediuncus absent. Paramere broad with tip sclerotized in posterior view, with anterior margin thin and elongate, but semi triangular in posteroventral view.

Female Terminalia ( Figs. 55 e–f): Ectoproct posterior margin rounded covered with thin elongate setae. Lateral gonapophyses rounded, much smaller than ectoproct, set with few thickened setae. 7 th sternite elongate with distal margin straight in ventral view, covered with long black setae. Pregenital plate rounded with a proximal transverse arched bar and an acute extension on ventral surface. Posterior gonapophyses broad, elongate, with tip dorsally enlarged and rounded; covered with long black setae and with few elongate cavisetae apically. 9 th tergite with an elongate membranous digitiform process. Anterior gonapophyses absent. Ventral membrane gonapophyseal plates present.

Distribution ( Fig. 51 ). Australia: WA. Known from sparse records in southern Western Australia.

Adult activity period. Records for January, March, and May.

Biology. Unknown, larva unknown.

Name-bearing type. Austrogymnocnemia lineata : Holotype (by original designation), male, WAM, high-resolution images examined. Type locality: Australia, Western Australia, 7.5 km SE Banjiwarn (homestead). From original description: “ Holotype, ♂, Western Australia, 7.5 km SE. Banjiwarn HS. (27 o 42’S., 121°37'E.), 24.iii.1979, T. F. Houston et al. 260-1 ( WAM)”. Condition: relatively good; abdomen dissected and tips of right wings damaged.

Additional material examined (2♀). AUSTRALIA: Western Australia: Kalgoorlie : 23.i.1986, A.J. Graham (1♀, AMSA) ; Laverton : v.1997 (1♀, SAMA) .

Comments. See Comments for A. interrupta .

Figures

FIGURE 51. Distribution of Austrogymnocnemia species (part).

FIGURE 54. Austrogymnocnemia lineata: a) head, anterior; b) head and thorax, dorsal; c) wings, dorsal.

FIGURE 55. Austrogymnocnemia lineata: male: a) terminalia, lateral; b) genitalia, lateral; c) genitalia, posterior; d) genitalia, posteroventral; female: e) terminalia, lateral; f) pregenital plate, ventral. Scale bars = 0.5 mm.