Lenziella

Giłka, Wojciech, 2011, Six unusual Cladotanytarsus Kieffer: towards a systematics of the genus and resurrection of Lenziella Kieffer (Diptera: Chironomidae: Tanytarsini), Zootaxa 3100, pp. 1-34 : 30-31

publication ID	https://doi.org/ 10.5281/zenodo.202994
DOI	https://doi.org/10.5281/zenodo.6190745
persistent identifier	https://treatment.plazi.org/id/6769C14C-FFCE-FFEA-FF17-FB39FA6AFE3B
treatment provided by	Plazi
scientific name	Lenziella
status

Treatment

Key to adults of Lenziella

1. Tibial apices of middle and hind leg distinctly enlarged, forming stout lobes ( Figs 2 View FIGURE 2 C, D; 4B–E; 5, 8, 11, 12: B, C); inferior volsella with globular swelling ventrally ( Figs 2 View FIGURE 2 H, 4K, 5G, 8G, 11G, 12H); sternite VIII with several setae placed in longitudinal rows under vaginal floor close to median margins or directly on vaginal margins; labia extensive, protruding beyond posterior margin of SVIII ( Figs 6 View FIGURE 6 A, B; 9A–D; 13A, B): Cladotanytarsus (Lenziella) View in CoL .................................... 2

–. Tibial apices of middle and hind leg never distinctly enlarged; inferior volsella without globular swelling ventrally; sternite VIII occasionally with few setae dispersed under vaginal floor; labia fine, never protruding beyond posterior margin of SVIII, often drawn out into finger-like lobes [see Bilyj & Davies (1989, figs 9–17)]: Cladotanytarsus (Cladotanytarsus) View in CoL , not keyed.

2. Antenna with 10–13 flagellomeres, proximal and/or distal flagellomeres indistinctly separated or fused, plume showing tendency for reduction, setae short and/or sparse ( Fig. 2 View FIGURE 2 A; Giłka 2001, fig. 10A). Males ............................... 3

–. Antenna with 4 or 5 flagellomeres, proximal flagellomere/s/ indistinctly separated, plume absent. Females .............. 8

3. Anal point extraordinarily broad, trapezoid ( Fig. 8 View FIGURE 8 D, E); hind tibia with single stout bristle apically ( Fig. 8 View FIGURE 8 C)............................................................................................ C. (L.) latissimus View in CoL sp. nov.

–. Anal point slender, subtriangular, lanceolate or club-shaped but never trapezoid ( Figs 2 View FIGURE 2 E, F; 4F, G; 5, 11, 12: D, E); hind tibia without single stout bristle apically ( Figs 2 View FIGURE 2 D; 4D, E; 5, 11, 12: C).............................................. 4

4. Inner setae (4–6) placed on prominent lobe at base of superior volsella ( Fig. 5 View FIGURE 5 D); anal point spinulae small or absent and replaced with setae ( Fig. 5 View FIGURE 5 D, E); tibial spurs and combs absent ( Fig. 5 View FIGURE 5 A–C)................. C. (L.) crusculus (Saether) View in CoL

–. Inner setae (3, exceptionally 4) placed on small protuberance at base of superior volsella, anal point spinulae distinct, never replaced with setae ( Figs 2 View FIGURE 2 E, F; 4F, G; 11D, E; 12: D, E, F); tibial spurs and combs reduced or vestigial but usually present on middle or/and hind leg ( Figs 2 View FIGURE 2 C, D; 4B–E; 11, 12: B, C)...................................................... 5

5. Superior volsella slightly narrowed in median part and distinctly swollen apically ( Fig. 2 View FIGURE 2 E); hind tibia with tuft of long and finely bent setae ( Fig. 2 View FIGURE 2 D)........................................................ C. (L.) bicornutus (Kieffer) View in CoL

–. Superior volsella strongly narrowed in distal half and finely swollen apically (Figs 4F, H; 11D; 12 D, F); hind tibia with relatively short or/and strongly curved setae (Figs 4D, E; 11C; 12C)................................................ 6

6. Anal point stout, parallel-sided or somewhat lanceolate (Fig. 4F, G)........................ C. (L.) amandus Hirvenoja View in CoL

–. Anal point slender, subtriangular ( Figs 11 View FIGURE 11 , 12 View FIGURE 12 : D, E).......................................................... 7

7. Stem of median volsella distinctly bent at base, with strongly curved furcate lamellae, stem distinctly longer than lamellae ( Fig. 11 View FIGURE 11 F).......................................................................... C. (L.) piniger View in CoL sp. nov.

–. Stem of median volsella straight or slightly bent, with slightly curved furcate lamellae, stem as long as lamellae ( Fig. 12 View FIGURE 12 G)............................................................................... C. (L.) subletteorum View in CoL sp. nov.

8. Hind tibia with single stout bristle apically; labia with posteromedian margins concave or irregularly rounded caudally, gonapophysis VIII relatively weak ( Fig. 9 View FIGURE 9 A–D).......................................... C. (L.) latissimus View in CoL sp. nov.

–. Hind tibia without stout bristle apically; labia with posteromedian margins parallel-sided, smoothly rounded caudally, gonapophysis VIII extensive ( Figs 6 View FIGURE 6 , 13 View FIGURE 13 : A, B)................................................................... 9

9. Vaginal floor moderately wide, covering about one-sixth of anterior part of vagina ( Fig. 6 View FIGURE 6 A, B)........................................................................................................ C. (L.) crusculus (Saether) View in CoL

–. Vaginal floor large, covering over one-third of anterior part of vagina ( Fig. 13 View FIGURE 13 A, B).......... C. (L.) subletteorum View in CoL sp. nov.