Cladotanytarsus viridiventris (Malloch)

Tanytarsus viridiventris Malloch, 1915: Malloch 1915: 491 (adult male; USA, Michigan).? Cladotanytarsus viridiventris (Malloch, 1915): Oliver et al. 1990: 56 (in catalogue, distribution); Bilyj & Davies 1989: 949 (pupa, in key); Giłka 2011b: 24 (remarks).

Remarks. The specific name has so far presumably been erroneously and repeatedly ascribed to various species (Giłka 2011b; J. Sublette, pers. comm.), and a subgeneric placement for Cladotanytarsus viridiventris cannot not be defined with certainty. For this reason it is not included in the present key. Nevertheless, a male specimen originally illustrated, having an elongate anal point and a long stem of the median volsella (Malloch 1915, pl. xxxvi, fig. 8), couples with C. acornutus, C. bilyji, C. muricatus or C. nigrovittatus . Following Malloch’s figure, the triangular superior volsella separates C. viridiventris from C. bilyji and C. muricatus, and the relatively short digitus and apically rounded inferior volsella from all the species compared.