Dilophus pinguis ( Heer, 1849 ) Skartveit & Krizmanić, 2020

Skartveit, John & Krizmanić, Katarina, 2020, Revision of fossil Bibionidae (Insecta: Diptera) from the Miocene of Radoboj, Croatia, Zootaxa 4759 (3), pp. 351-378 : 367-369

publication ID

https://doi.org/10.11646/zootaxa.4759.3.3

publication LSID

lsid:zoobank.org:pub:FBD53C14-07AA-4E01-9739-214680A1DE4C

DOI

http://doi.org/10.5281/zenodo.3810445

persistent identifier

http://treatment.plazi.org/id/C6550F6A-950C-FF9C-23B1-FDABFA8FE44A

treatment provided by

Plazi

scientific name

Dilophus pinguis ( Heer, 1849 )
status

comb.n.

Dilophus pinguis ( Heer, 1849)   comb.n.

( Figs. 15–17 View FIGURE 15 View FIGURE 16 View FIGURE 17 , 34–37 View FIGURES 32–35. 32 View FIGURES 36–38. 36 )

Bibio pinguis Heer, 1849: 220  

Type material: Lectotype (female, hereby designated) ( SLJG 77473) this is the specimen depicted by Heer (1849: Plate XVI, Fig. 11a View FIGURE 11 ). The specimen has been labeled as a syntype of Bibio maculatus Heer   but this is obviously not correct. The specimen was described as Bibio pinguis radobojanus   by Heer. Specimen SLJG 77475 is probably the counterpart of SLJG 77473. Paralectotype (female, hereby designated) ( NHMW 1842/0050/0022), this is the specimen described as « var. paulo   minor » and depicted by Heer (1849: Plate XVI, Fig. 11c View FIGURE 11 ) We have not seen the type of B. pinguis oeningensis   ; according to the original description ( Heer 1849: 221 and Pl. XVI, Fig. 11b View FIGURE 11 ) it would be quite similar to B. pinguis radobojanus   .

Additional material. Male ( CNHM 1832).

By far the biggest Dilophus   species, fossil or recent, known from Europe.

Description

Male (N=1 for all measurements): Total length 12.6 mm.

Head: Not preserved in the specimen at hand.

Thorax: Length 3.2 mm. Very poorly preserved, spine combs not possible to see.

Wing: Length 9.5 mm, width 3.3 mm. Dark brown fumose, anterior area a little darker than posterior. Vein measurements: basal R 3.6 mm, distal R 1 2.5 mm, basal R s 0.9 mm.

Legs: Fore leg relatively slender, tibia possibly with two small spines mesally, apical spines fine and short, not possible to count. Hind leg ( Fig. 34 View FIGURES 32–35. 32 ) femur 4.0 mm long, 0.75 mm wide, moderately clavate, tibia 4.1 mm long, 0.6 mm wide, straight-sided, first tarsomere slender.

Abdomen: Length 8.3 mm, width 2.1 mm, cylindrical and relatively slender.

Terminalia ( Fig. 35 View FIGURES 32–35. 32 ): Gonostylus digitiform as usual for genus. Shape of epandrium not possible to make out in the specimen at hand.

Female: Total length 15.0 mm

Head: Length 2.0 mm. Dark brown, presumably black in life. Complex eye small, rounded, protruding. Occiput approximately twice as long as complex eye. Ocellar tubercle low, not conspicuous. Antennal flagellum stout, possibly six-segmented.

Thorax: Length 5.6 mm. Ochreous-brown, pronotum probably a little darker. Spine rows on pronotum and mesonotum apparently consisting of short, stout spines.

Wing: Length 12.3 mm, width 4.4 mm. Apparently hyaline (no pigment preserved). Veins colourless. Basal part of R s about equal to R-M.

Legs: Femorae ochreous-brown, tibiae and tarsi blackish-brown. Spine arrangement on protibia unclear: possibly three mesal spines in an oblique row. Apical spine circlet with short, widely separated spines, possibly six. Hind tibia and tarsus slender. Length of fore tibia 3.1 mm, hind femur 4.4 mm, hind tibia 4.7 mm.

Abdomen: Length 10.1 mm. Ochreous-brown. Pile not apparent. Cerci short, somewhat pointed.

SLJG

Steiermarkisches Landesmuseum Joanneum

NHMW

Naturhistorisches Museum, Wien

CNHM

Cincinnati Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Bibionidae

Genus

Dilophus

Loc

Dilophus pinguis ( Heer, 1849 )

Skartveit, John & Krizmanić, Katarina 2020
2020
Loc

Bibio pinguis

Heer, O. 1849: 220
1849