Penthetria longiventris ( 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 : 27-29

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.6039605

persistent identifier

https://treatment.plazi.org/id/03A9879C-FFE4-F420-45D3-31FD788F3DDF

treatment provided by

Plazi

scientific name

Penthetria longiventris ( Théobald, 1937 )
status

comb. nov.

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

( Figs. 11 View FIGURE 11 , 85 – 89 View FIGURES 85 – 89 )

Plecia longiventris Théobald, 1937: 133 View in CoL – 134.

Plecia superba Théobald, 1937: 134 View in CoL – 135, nec Meunier, 1915. Syn.n.

Material examined. Paratype female FSL 391901 (fig. 11). This is the specimen depicted by Théobald (1937: XI: 8), from Célas.

Additional material: MNHN Monteils 11 (female), Monteils 13 (female), Monteils 16 (male), Monteils 20 (female), Monteils 21 (female), Monteils 26 (male), Monteils 50 (female), Monteils 51 (male), Monteils 108 (female), Monteils 145 (female), Monteils 161 (female).

Localities. Célas, Monteils.

Diagnosis. A medium-sized (8.5 – 11.5 mm) Penthetria . Most specimens are of a uniform, brown colour. Antennal flagellum 9-segmented. Male gonostylus very robust, short, sharply pointed. Female head rounded, ocellar tubercle not very prominent, compound eye relatively small.

Redescription. Male: Total length 8.5 – 10.5 mm (N=3). Entirely dark brown, probably black in life.

Fig. 86 View FIGURES 85 – 89 . Male, head. MNHN Monteils 51.

Fig. 87 View FIGURES 85 – 89 . Male, terminalia, dorsal. MNHN Monteils 51. Fig. 88 View FIGURES 85 – 89 . Female, head and thorax, lateral. MNHN Monteils 13. Fig. 89 View FIGURES 85 – 89 . Female, head and thorax, dorsal. MNHN Monteils 145.

Head (fig. 86): Length 1.4 mm (N=1), width 1.6 mm (N=1). Compound eye without conspicuous pile. Antenna relatively long, segments not possible to count in any of the specimens at hand.

Thorax: Length 2.1 mm (N=2). Haltere pale.

Wing: Length 6.8 mm (N=1). Hyaline to light brown fumose, veins concolourous with membrane, pterostigma invisible. Costa extends a little beyond apex of R4+5. Humeral vein present, Subcosta fine and long. Vein R 2+3 straight, oblique. R4+5 distally curved. Fork of M long and rounded.

Legs: Entirely slender. Fore femur 2.8 mm (N=1), fore tibia 2.7 mm (N=1). Hind femur 2.5 mm (N=1), hind tibia 2.6 mm (N=1).

Abdomen: Length 5.7 – 6.9 mm (N=3), width 1.1 – 1.3 mm (N=2). Slender, slightly conical.

Terminalia (fig. 87): Hypopygium width 0.9 – 1.1 mm (N=2), gonostylus length 0.38–0.45 mm (N=2). Gonostylus very robust, sharply pointed.

Female: Total length 8.5 – 11.5 mm (N=5). Dark brown.

Head (figs. 88–89): Length 1.13 – 1.39 mm (N=3), width 0.99 – 1.34 mm (N=4). Rounded triangular, widest near hind corners. Compound eye not prominent. Antenna relatively elongate, flagellum 9-segmented, 0.77 mm long (N=1), 0.15 mm wide (N=1).

Thorax: Length 2.4 – 3.2 mm (N=2), width 1.9 – 2.6 mm (N=2). Haltere brown.

Wing (fig. 85): Length 7.1 – 11.5 mm (N=7), width 3.2 mm (N=1), length/width = 2.70 (N=1), brown fumose, anterior part slightly darkened, veins dark brown, coloured throughout wing. Costa extends a little beyond apex of R4+5. Pterostigma not conspicuous. R2+3 almost straight, slightly curved. R4+5 distally curved. Fork of M long and rounded. CuA2 curved basad in distal part. Vein measurements in Table 1 View TABLE 1 .

Legs: Dark brown, relatively short, slender. Fore femur 2.1 – 3.2 mm (N=2), fore tibia 2.4 – 3.0 mm (N=2), hind femur 2.4 – 3.5 mm (N=3), hind tibia 2.3 – 4.0 mm (N=4).

Abdomen: Brown. Length 5.3 – 8.3 mm (N=5), width 2.2 – 3.2 mm (N=5).

Terminalia: Tergite IX mesally with a deep, U-shaped excavation. Cerci rather small, two-segmented, slender.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Bibionidae

Genus

Penthetria

Loc

Penthetria longiventris ( Théobald, 1937 )

Skartveit, John & Nel, André 2017
2017
Loc

Plecia longiventris Théobald, 1937 : 133

Theobald 1937: 133
1937
Loc

Plecia superba Théobald, 1937 : 134

Theobald 1937: 134
1937
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF