Fissuleon mouldsorum (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 : 50-53

Fissuleon mouldsorum (New, 1985) , new combination

( Figs. 12 , 15–16 )

http://zoobank.org/NomenclaturalActs/ D998714E-6990-4C69-8A62-BCB7C01B19B1

Glenoleon mouldsorum New 1985b:44 (OD); New 1996:83 (cat); Stange 2004:105 (cat); Oswald 2018 (cat).

Glenoleon dannyae New 1985:56 (OD); New 1996:82 (cat); Stange 2004:103 (cat); Oswald 2018 (cat). new synonym.

Diagnosis. Body mostly pale; forewing subcostal area hyaline; frons pale with a curved brown line above, but not below, antennae.

Description. Lengths: forewing: 24–27 mm; hind wing: 22–25 mm.

Head ( Figs. 15 a–b): Labrum pale, set with a line of elongate setae. Clypeus pale, with few short pale setae. Frons mostly pale except for a transverse dark brown line above antennae. Gena pale. Vertex raised; in anterior view pale, with two short transverse dark marks laterally and a small medial dark mark; in dorsal view mostly pale with two central perpendicular dark lines; covered with short black setae. Ocular setae white and elongate. Antennae clubbed; elongate, ≥ 2x length of pronotum; distance between antennae wider than scape width; all segments ante- rior surface pale, posterior brown; torular membrane pale; flagellomeres almost as long as wide at base, apical ones wider than long; all segments set with short black setae. Mandibles pale, with tip black. Palpi, maxillary and labial pale, except for maxillary apical segment, brown; covered with short black setae, apical labial palpomere fusiform, palpimacula opening slit-like and located medially.

Thorax ( Fig. 15b ): Pronotum about as long as wide; posterior margin as wide as anterior; subapical furrow present; mostly pale, with dark brown areas as follows: lateral margins, two longitudinal curved lines near lateral region, two broad longitudinal lines around center (interrupted at furrow); covered with short black setae. Mesonotum mostly dark brown, except for two rounded pale marks on prescutum, few longitudinal pale lines on scutum, and scutellum posterior margin pale; all segments set with short black setae. Metanotum, prescutum pale but with two central, dark brown marks, scutum dark brown with two longitudinal, pale lines, scutellum black with medial and posterior lines pale; set with short black setae. Pterothoracic pleura dorsal sclerites mostly dark brown with small pale areas, ventral sclerites mostly pale with dorsal margin dark brown; set with short white setae; Miller’s organ absent.

Wings ( Fig. 15c ): Fairly broad; Banksian lines absent; veins mostly brown, but some veins intercalated with white spots, beset with short black setae. Male pilula axillaris present. Forewing membrane mostly hyaline with small brown infuscations at vein forks near the posterior margin, and at mediocubital area; pterostigma white, with center dark brown; CuA fork located near RP origin; three presectoral crossveins; subcostal veinlets simple (sometimes a few apical veinlets forked); posterior area wider than prefork area. Hind wing membrane hyaline; MP fork located near RP origin; subcostal veinlets simple; one presectoral crossvein.

Legs: All pairs of legs, femur elongate (> 2x length of coxa); tibia about as long as femur; but slightly longer than tarsi; tibial spurs elongate, reaching T2 apex; T2, T3 and T4 about the same size; T1 longer than T2; T5> 2x length of T1; claws slightly shorter than half of T5 length; coxa, trochanter and femur covered with short white setae, and some long white setae on femur; tibia set with short white and black setae, and some long white setae; tarsi set with short black setae. Proleg sense hair short, slightly longer than femur width; tibia with antennal cleaning setae ventroapically; coxa predominantly pale with small dark brown marks on external surface; trochanter pale, femur slightly enlarged, mostly pale, but with dorsal surface darker (mainly at tip); tibia generally pale with two dark brown marks, one at base and another at tip (in few specimens the brown marks are reduced, like the holotype), T2, T3, T4 and tip of T5 dark brown, remaining areas pale. Mesoleg with same colour pattern of proleg. Metaleg, femur and tibia slightly longer than mesoleg; colour pattern equal to other legs, except for reduced tibial dark areas.

Abdomen: Mostly black with some pale marks on anterior margin of basal segments; covered with short black setae.

Male Terminalia ( Figs. 16 a–c): Ectoproct posterior margin rounded in lateral view; set with elongate black setae, mainly at the ventral area. 9 th sternite short, with posterior margin extended medially in ventral view; covered with long black setae. Gonarcus thin, an arched bar in posterior view; medial area narrower than lateral in posterior view. Mediuncus membranous. Paramere broad, wider than gonarcus in lateral view; apex and ventral margin more sclerotized.

Female Terminalia ( Figs. 16 d–e): Ectoproct posterior margin rounded, covered with thin elongate setae and some cavisetae ventrally. Lateral gonapophyses rounded, smaller than ectoproct, covered with cavisetae. 7 th sternite elongate, with distal margin rounded, covered with short black setae. Pregenital plate in ventral view, an inverse triangle, with dorsal margin elongate. Posterior gonapophyses very short, covered with long black setae. 9 th Tergite membranous digitiform process absent. Anterior gonapophyses absent. Ventral membrane with gonapophyseal plates present, and ventromedial plate covered with short black setae.

Distribution ( Fig. 12 ). Australia: NT*, WA. Known from the northwestern parts of mainland Australia. Existing records suggest that F. mouldsorum may be allopatrically distributed relative to its sister species F. brevigonarcus .

Adult activity period. Records for October, November, and March.

Biology. Unknown, larva unknown.

Name-bearing types. Glenoleon mouldsorum : Holotype (by original designation), male, AMSA, high-resolution images examined. Type locality: Australia, Western Australia, Derby (town), Tunnel Creek . From original description: “ Holotype, ♂, Western Australia, Tunnel Creek, E. of Derby, 1.xi.1978, M. S. and B. J. Moulds (AM)”. Condition: excellent, terminalia dissected.

Glenoleon dannyae : Holotype (by original designation), female, ANIC, examined. Type locality: Australia, Northern Territory, 46 km SSW of Borroloola , 16º28'S, 136º09'E. From original description : “ Holotype, ♀, North- ern Territory , 16 o 28’S., 136 o 09’E., 46 km SSW. Borroloola, 28.x.1975, M. S. Upton ( ANIC). Condition: excellent, terminalia dissected .

Additional material examined (5♂, 14♀). AUSTRALIA: Western Australia: 8 km SWbyW of Cane River HS, 22.07S– 115.33E, 31.iii.1971, E.F. Riek (5♂, 13♀, ANIC) ; 28 km W of Louisa , x.1960 (1♀, FSCA) .

Comments. Glenoleon mouldsorum and Glenoleon dannyae were both described from single specimens—a male and female respectively—by New (1985b). The primary differences cited between the two was the dark brown marks on the pro- and mesotibiae of G. dannyae , which are lacking in G. mouldsorum . The examined series of 18 specimens collected on the same date from the Cane River (WA) site, which we consider to be conspecific, contains males and females whose terminalia closely match the unique holotypes of both species; we consider the two species to be synonymous on that basis. Because the two species names have identical priority, acting as First Reviser (Art. 24.2.1), we select the species name moldsorum to have priority over dannyae .

Figures

FIGURE 12. Distribution of Fissuleon species.

FIGURE 15. Fissuleon mouldsorum: a) head, anterior; b) head and thorax, dorsal; c) wings, dorsal.

FIGURE 16. Fissuleon mouldsorum: male: a) terminalia, lateral; b) genitalia, lateral; c) genitalia, posterior; female: d) terminalia, lateral; e) terminalia, ventral. Scale bars = 0.5 mm.