Penthetria gigantea ( Théobald, 1937 ) Theobald, 1937

Skartveit, John & Nel, André, 2017, Revision of fossil Bibionidae (Insecta: Diptera) from French Oligocene deposits, Zootaxa 4225 (1), pp. 1-83 : 24

publication ID

https://doi.org/ 10.5281/zenodo.259087

publication LSID

lsid:zoobank.org:pub:4676EE59-569B-4197-B108-9B32FD88E68E

DOI

https://doi.org/10.5281/zenodo.6039597

persistent identifier

https://treatment.plazi.org/id/03A9879C-FFE9-F42B-45D3-35697902393D

treatment provided by

Plazi

scientific name

Penthetria gigantea ( Théobald, 1937 )
status

comb. nov.

Penthetria gigantea ( Théobald, 1937) View in CoL comb.n.

(Figs. 6 – 9, 78 – 80)

Plecia gigantea Théobald, 1937: 226 View in CoL – 227.

Plecia crassiventris Théobald, 1937: 227 View in CoL . Syn.n. Plecia miegi Théobald, 1937: 232 View in CoL – 233. Syn.n. Plecia luteipennis Théobald, 1937: 233 View in CoL . Syn.n.

Material examined. Holotype (female) of Plecia gigantea NMB F1380, (fig. 6). Paratypes (females) of Plecia gigantea NMB F460, F1388. Holotype (female) of Plecia crassiventris NMB F1381, (fig. 7). Paratypes (females) of Plecia crassiventris NMB F1389/1, F1389/2. Holotype (male) of Plecia miegi NMB F1399 (fig. 8), part + counterpart. Paratypes (males) of Plecia miegi NMB F1400, F1401. Holotype (male) of Plecia luteipennis NMB F1402/F2420 (fig. 9) (part and counterpart of same specimen). Paratype (male) of Plecia luteipennis NMB F1413.

Localities. Kleinkembs.

Diagnosis. A large (8–13.5 mm) and slender Penthetria with relatively long and slender legs. Antennal flagellum probably 8-segmented. Male epandrium subtriangular, gonostylus conical, apically slender. Wing yellowish fumose in male, brownish in female. Vein R2+3 nearly straight with a small bend in middle.

Redescription. Male: Total length 8.0 – 13.5 mm (N=4). Entirely black.

Head: Length 1.1 – 1.5 mm (N=4), width 1.1 mm (N=2). Antennal flagellum cylindrical, approximately 8- segmented.

Thorax: Length 2.1 – 3.0 mm (N=4), width 1.7 – 2.4 mm (N=2). Haltere dark brown.

Wing (fig. 78): Length 9.1 – 11.6 mm (N=3), width 3.2 – 3.4 mm (N=2), length/width = 3.02 – 3.40 (N=3). Light brown fumose with brown R-veins, posterior veins colourless. Costa extends some distance beyond apex of R4+5. Humeral vein present, Subcosta long and horizontal. R2+3 rather straight, oblique. Pterostigma inconspicuous. Basal part of Rs subparallel to M. Fork of M relatively long. Wing vein measurements in Table 1 View TABLE 1 .

Legs: relatively long and slender, dark brown. Femorae slightly clavate. Femur 1 length 3.2 – 3.6 mm (N=2), tibia1 length 3.3 – 3.6 mm (N=2), femur 3 length 3.4 – 4.5 mm (N=3), tibia 3 length 3.8 – 4.3 mm (N=2).

Abdomen: Length 4.6 – 9.6 mm (N=5), width 1.0 – 1.4 mm (N=2). Brown, slender, cylindrical. Abdominal pile rather short.

Terminalia (fig. 80): Epandrium rather small, subtriangular. Gonostylus robust, almost straight, sharply pointed. Hypopygium width 1.3 – 1.5 mm (N=2), gonostylus length 0.64 – 0.67 mm (N=2).

Female: Total length 9.2 – 13.5 mm (N=4). Entirely black.

Head: Length 0.9 – 1.2 mm (N=3), width 0.7 – 1.0 mm (N=2). Relatively small, oval, longer than broad. Compound eyes do not protrude. Antennal flagellum cylindrical, probably eight-segmented.

Thorax: Length 2.8 – 4.6 mm (N=6), width 2.3 – 3.2 mm (N=4). Black. Sulci deep and conspicuous. Pile not conspicuous. Haltere yellowish-brown.

Wing (fig. 79): Length 9.4 – 11.5 mm (N=6), width 3.0 – 3.8 mm (N=3), length/width = 2.95 – 3.77 (N=4). Brown fumose. Radial veins light brown, strong, more posterior veins fine and inconspicuous. Pterostigma invisible. Venation as in male. Wing vein measurements in Table 1 View TABLE 1 .

Legs: Dark brown. Long and slender, femorae slightly clavate. Tibia 3 length 5.1 mm (N=1).

Abdomen: Length 5.9 – 8.1 mm (N=3), width 2.5 – 3.2 mm (N=4). Dark brown, cylindrical. Pile not conspicuous.

Terminalia: Cercus two-segmented as usual for genus, rather small, pointed.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Bibionidae

Genus

Penthetria

Loc

Penthetria gigantea ( Théobald, 1937 )

Skartveit, John & Nel, André 2017
2017
Loc

Plecia gigantea Théobald, 1937 : 226

Theobald 1937: 226
1937
Loc

Plecia crassiventris Théobald, 1937 : 227

Theobald 1937: 227
Theobald 1937: 232
Theobald 1937: 233
1937
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