Bibio gracilis Unger, 1842: 426 Protomyia gracilis Heer, 1856 Revision of fossil Bibionidae (Insecta: Diptera) from the Miocene of Radoboj, Croatia Skartveit, John Krizmanić, Katarina Zootaxa 2020 2020-04-03 4759 3 351 378 9HM5K (Unger, 1842) Skartveit & Krizmanić 2020 Unger 1842 [151,551,585,612] Insecta Bibionidae Penthetria Animalia Diptera 4 355 Arthropoda species gracilis comb. nov.  ( Figs. 3, 22–23)      Bibio gracilis Unger, 1842: 426. (nec  Protomyia gracilis Heer, 1856)   Type material:  Holotype(male, SLJG 77464). Heer (1849: 217)mentioned one specimen from Graz and one from Vienna. There is a male specimen in NHMWlabeled «  Bibio ungeriHeer» which is clearly not conspecific with the holotypeof  Bibio ungeri, this could possibly be the second specimen.  Male: Total length 11.2 mm Head: Length 1.21 mm, width 1.32 mm. Black, very poorly preserved. Thorax: Length 3.2 mm, width 2.4 mm. Black. Halter yellowish-brown.   FIGURE 3.  Penthetria gracilis, male, holotype, SLJG 77464. Wing ( Fig. 22): Length 7.4 mm, width 3.3 mm. Dark brown fumose, veins strong throughout, dark brown, pterostigma indistinctive. Costa quite straight, subcosta indistinctive. Costa extends a little over half-way between apices of R 4+5and M 1. R 2+3straight and oblique. M-veins and CuA 1apically straight. CuA 2apically curved. Vein measurements: basal R 2.4 mm, distal R 1 3.2 mm, basal R  s 1.2mm, distal R  s 1.3mm, R 2+3 1.4 mm, R 4+5 2.9 mm, R-M 0.4 mm, basal M 2.8 mm, distal M 0.6 mm, M 1 3.5 mm, M 2 2.8 mm, M-Cu 0.3 mm, CuA 2.0 mm, CuA 1 3.8 mm, CuA 2 2.5 mm. Legs: Black, poorly preserved. Length of fore femur 2.3 mm, hind femur 3.3 mm. Abdomen: Length 7.3 mm, width 1.7 mm. Black, rather slender. Pile not apparent. Terminalia ( Fig. 23): Hypopygium width 1.2 mm. Gonostylus digitiform, slender and curved. Epandrium moderately bilobate with wide, shallow indentation between rounded lobes.  Femaleunknown. The species is not to be confused with  Protomyia gracilis Heer, 1856(placed as a synonym of  Plecia bucklandiby Skartveit & Nel 2017), which was listed as  Penthetria gracilisby Handlirsch (1907)and Evenhuis (1994). 2595809713 NHMW 4 355 SLJG 77464 2 holotype