Nannotanyderus ansorgei Krzemiński, Azar and Skibińska, 2013a

Skibinska, Kornelia, 2016, Nannotanyderinae: a new subfamily of Tanyderidae (Diptera), Palaeontologia Electronica 19 (3), pp. 1-16 : 8

Nannotanyderus ansorgei Krzemiński, Azar and Skibińska, 2013a

Figures 9-10

Remarks. Nannotanyderus ansorgei is the smallest known tanyderid, with a wing length of 1.56 mm. It is described from Lower Cretaceous Lebanese amber and is the species for which the morphology of Nannotanyderus could first be observed in its entirety (others described prior to this were based only on wings). The male habitus of N. ansorgei is exemplary of Nannotanyderinae ; thus, it was selected as type species of the subfamily. The length of the gonopod at rest in this species is approximately 3/4 the total length of the abdomen ( Figure 9 ). In the wing, vein Sc ends apical to the fork of Rs into R 4+5 and R 2+3 and cross-vein r-m is placed at a level approximately 2/3 along the length of the d-cell ( Figure 10.1 ).

Figures

FIGURE 9. Photographs of Nannotanyderus ansorgei (JG. 385/2B). 1, whole specimen. 2, male genitalia in ventral view. Scale equals 0.5 mm.

FIGURE 10. Drawings of Nannotanyderus ansorgei (JG. 385/2B). 1, wing venation. 2, male genitalia in dorsal view. Scale equals 0.5 mm.