Tanytarsus, SPP.

TANYTARSUS SPP. View in CoL

( FIG. 6A–F)

Material examined

Ta n y t a r s u s s p. 1, o n e a d u l t m a l e i n a n 8.5 mm × 6 mm × 3.5 mm piece of amber (inventory no. BSIP Tad-533; Fig. 6A, B); Tanytarsus sp. 2 , one adult male in a 6.5 mm × 5 mm × 4 mm piece of amber (inventory no. BSIP Tad-883 a; Fig. 6C, D), syninclusion: Coleoptera (inventory no. BSIP Tad-883 b); Tanytarsus sp. 3 , one adult male in a 6 mm × 3 mm × 1 mm piece of amber preserved in a cubicoid plastic mass (inventory no. BSIP Tad-884; Fig. 6E, F); Early Eocene , ~54 Mya, Tadkeshwar mine, Gujarat state, India .

Remarks

The above three specimens are ascribed to the genus Tanytarsus on the basis of the head, wing and hypopygium characters (cf. Stebner et al., 2017). However, most of the diagnostic structures are weakly observable, deformed or insufficiently preserved to define the individuals definitively to species level. Nevertheless, these males differ distinctly from each other and from those designated as new species described in this paper, thus they most probably belong to another species. Therefore, with presumably five species, Tanytarsus is the most species-rich genus among the Cambay Tanytarsini . The specific diversity proportions within the tribe may thus be similar relative to the extant fauna: five Tanytarsus / eight Tanytarsini in Cambay amber vs. ~360 Tanytarsus /~700 Tanytarsini extant species (Giłka W, Zakrzewska M, unpublished data).

SUBTRIBE: ZAVRELIINA SAETHER, 1977