Glenoleon froggatti ( Esben-Petersen, 1923 ) Machado & Oswald, 2020

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 : 163-166

Glenoleon froggatti ( Esben-Petersen, 1923) , new combination

( Figs. 78–80 )

http://zoobank.org/NomenclaturalActs/ 21B0223B-62EE-44BD-B04A-FB37723131EA

Platyleon froggatti Esben-Petersen, 1923:578 (OD); Stange 1976:312 (cat); New 1985b:10 (key, rd, ill); New 1996:91 (cat); Stange 2004:107 (cat); Oswald 2018 (cat).

Diagnosis. Legs elongate; tibial spurs reaching T2 apex; forewing costal area biareolate; hind wing without broad bands on apical half; male paramere located posterior to gonarcus/mediuncus complex; female pregenital plate conically invaginated.

Description. Lengths: forewing: 24–28 mm; hind wing: 22–26 mm.

Head ( Figs. 79 a–b): Labrum pale; set with a line of elongate setae. Clypeus pale, with some elongate pale setae. Frons dark brown except for ventrolateral corners pale; set with short white setae. Gena pale. Vertex raised; pale except for two rounded dark brown marks around midline in dorsal view, and some irregular lateral dark marks on posterior border; covered with short black setae. Ocular setae absent. Antennae clubbed; elongate,> 2x length of pronotum; distance between antennae wider than scape width; scape and pedicel brown with distal margin pale; flagellum mostly brown, except for five to six subapical segments pale and apex dark brown; torular membrane dark brown; flagellomeres almost as long as wide at base, apical ones much wider than long; all segments set with short black setae, except for scape and pedicel with few short white setae. Mandible pale to brown, with tip black. Palpi, maxillary and labial mostly pale with irregular dark brown marks mainly on basal segments; apical labial palpomere fusiform, palpimacula opening oval-shaped, located medially

Thorax ( Fig. 79b ): Pronotum longer than wide; posterior margin slightly wider than anterior; subapical furrow present; mostly pale except for some dark brown areas: a broad sagittal line (forked on anterior margin in some specimens), two thin and sinuous longitudinal lines near midline (interrupted medially in some specimens), and longitudinal marks on lateral margin; beset with short black setae, and some elongate setae on margins. Mesonotum mostly dark brown, with pale areas on each segment: two curved marks on prescutum, two large marks around midline but enclosing a short dark brown line, and a sinuous line laterally at scutum; beset with short black setae. Metanotum dark brown, except for large pale marks at scutum, and some irregular pale areas on scutellum of some specimens; covered with short black setae. Pterothoracic pleura mostly pale, except for dark brown marks, mainly at ventral margin of sclerites; covered with white setae; Miller’s organ present.

Wings ( Fig. 79c ): Fairly broad; anterior Banksian line present in both wings, but posterior absent; veins mostly dark brown, but some veins intercalated with white spots, beset with short black setae. Male pilula axillaris present. Forewing membrane mostly hyaline with some brown areas as follows: surrounding veins at tip of prefork area, beneath pterostigma, around gradate veins, posterior margin and tip with small brown infuscations; CuA fork located between RP origin and first fork; three presectoral crossveins; costal area large, biareolate, with most of subcostal veinlets forked; posterior area narrower than prefork area. Hind wing membrane mostly hyaline except for a small brown mark hypostigmatic cell base, a large mark on rhegmal area, and small brown infuscations at tip; MP fork located between RP origin and first fork; subcostal veinlets mostly simple but few forked; one presectoral crossvein with a medial spur in some specimens.

Legs ( Figs. 79 a–b): All pairs of legs, femur elongate (> 3.5x length of coxa); tibia slightly longer than femur and about 1.5x longer than tarsi; tibial spurs reaching T2 apex; T2, T3 and T4 about same size, T1 about twice longer than T2, T5> 2x length of T1; claws about half of T5 length; coxa, trochanter, and femur set with short white setae and few scattered long white setae at femur; femur, tibia, and tarsi set with long and short black setae; T5 ventrally with two rows of thick, long, black setae. Proleg sense hair slightly longer than femur width; tibia with antennal cleaning setae ventroapically; coxa pale with irregular dark marks; trochanter pale, femur and tibia pale to brown with apex dark brown; tarsi pale with T3, T4, and apex of T5 dark brown. Mesoleg colour pattern similar to proleg, except for coxa entirely pale. Metaleg similar to mesoleg except with femur and tibia slightly longer than in other legs.

Abdomen: Mostly dark brown with irregular pale marks, mainly at lateral margins on tergites and medial areas of sternites. Beset with short black setae, and some white ones on basal segments, mainly sternites.

Male Terminalia ( Figs. 80 a–d): Ectoproct posterior margin rounded in lateral view, in posterior view with inner ventral margin enlarged; covered with elongate black setae. 9 th sternite short with posterior margin rounded, in ventral view; set with very long black setae. Gonarcus / mediuncus complex long and tubular. Paramere strongly sclerotized, fused at apex of gonarcus/mediuncus complex; curved with tip acute.

Female Terminalia ( Figs. 80 e–f): Ectoproct posterior margin rounded, covered with thin elongate setae. Lateral gonapophyses rounded, smaller than ectoproct, covered with cavisetae. 7 th sternite long with distal margin straight in ventral view, covered with long black setae. Pregenital plate large and conically invaginated. Posterior gonapophyses broad, elongate, curved and with tip rounded; covered with long black setae, and many elongate cavisetae apically. 9 th tergite with a short membranous digitiform process. Anterior gonapophyses as two internal small lobes located at base of posterior gonapophyses, bearing short thickened setae; only seem in ventral view. Ventral membrane with gonapophyseal plates present, and with a sclerotized rectangular bar ventral to the anterior gonapophyses, also bearing short thickened setae.

Distribution ( Fig. 78 ). Australia: NSW, NT*, QLD, VIC*. Known from scattered records in eastern Australia, with an outlier in southern Northern Territory.

Adult activity period. Records for November to February.

Biology. Nothing published exists for this species, but one male deposited in the FSCA was reared by Robert B. Miller in 1998 from a larva collected in a tree hole near a river in Queensland. The larval collection site suggests that G. froggatti larvae may develop in tree holes like many other Dendroleontini species ( Stange 1976; Stange & Miller 1990). The exuviae also shows that the larva possesses three large mandibular teeth, and the typical Dendroleontinae setal tuft located medially on mesonotum ( Stange & Miller 1990).

Name-bearing type. Platyleon froggatti : Holotype (by explicit monotypy), female, ANIC, examined. Type locality: Australia, New South Wales, Hay (town). From original description: “One ♀, N.S. Wales, 20.12.1915 (W. W. Froggatt leg.). Coll. Froggatt ”. From New 1985b: “ Holotype, ♀, New South Wales, Hay (Eucalyptus), 20.xii.1915, W. W. Froggatt leg. ( ANIC) (seen) (antennae missing)”. Condition: relatively good; antennae missing, abdomen broken but stored with the specimen, body with some white mold.

Additional material examined (9♂, 18♀). AUSTRALIA: New South Wales: Deniliquin : 1.i.1944 (1♀, MVM) ; Hay : 1917, W.W. Froggatt (1♀, ANIC) ; Murray River 50 mi W of Wentworth, 22.xi.1967 (1♀, MVM) ; Niemur River: Near Wakool , 28.xii.1954 (1♂, MVM) ; Northern Territory: Alice Springs: Stuart Highway roadhouse rest area, 19.xi.1989, R.B. Miller (1♂, FSCA) ; Queensland: Brisbane : (3♀, QMBA) ; Dalby : 3.ii.1932 (4♂, 5♀, QMBA) ; Roma : 30.i.1932 (2♂, 3♀, QMBA) ; 30.ii.1930, Franzen leg. (1♀, QMBA) ; Coll. Esben-Petersen (1♀, ZMUC) ; Stradbroke Island : xii.1912 (1♀, ANIC) ; White Mountain Natural Park: Julia Creek , xii.1998, R.B. Miller, in tree along river (in tree hole) (1♂, FSCA) ; Victoria: Yarrawonga : 4.i.1948 (1♀, MVM) .

Comments. See Comments for Glenoleon .

Figures

FIGURE 78. Distribution of Glenoleon species (part).

FIGURE 79. Glenoleon froggatti: a) head, anterior; b) head and thorax, dorsal; c) wings, dorsal.

FIGURE 80. Glenoleon froggatti: male: a) terminalia, lateral; b) genitalia and ectoproct, posterior; c) genitalia, dorsal; d) genitalia, lateral; female: e) terminalia, lateral; f) terminalia, ventral. Scale bars = 0.5 mm.