Lenziella
Creators: name: Giłka, Wojciech
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Lenziella

description: Key to adults of Lenziella
1. Tibial apices of middle and hind leg distinctly enlarged, forming stout lobes (Figs 2 C, D; 4B–E; 5, 8, 11, 12: B, C); inferior volsella with globular swelling ventrally (Figs 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 A, B; 9A–D; 13A, B): Cladotanytarsus (Lenziella) .................................... 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), 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 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 D, E); hind tibia with single stout bristle apically (Fig. 8 C)............................................................................................ C. (L.) latissimus sp. nov.
–. Anal point slender, subtriangular, lanceolate or club-shaped but never trapezoid (Figs 2 E, F; 4F, G; 5, 11, 12: D, E); hind tibia without single stout bristle apically (Figs 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 D); anal point spinulae small or absent and replaced with setae (Fig. 5 D, E); tibial spurs and combs absent (Fig. 5 A–C)................. C. (L.) crusculus (Saether)
–. Inner setae (3, exceptionally 4) placed on small protuberance at base of superior volsella, anal point spinulae distinct, never replaced with setae (Figs 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 C, D; 4B–E; 11, 12: B, C)...................................................... 5
5. Superior volsella slightly narrowed in median part and distinctly swollen apically (Fig. 2 E); hind tibia with tuft of long and finely bent setae (Fig. 2 D)........................................................ C. (L.) bicornutus (Kieffer)
–. 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
–. Anal point slender, subtriangular (Figs 11, 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 F).......................................................................... C. (L.) piniger sp. nov.
–. Stem of median volsella straight or slightly bent, with slightly curved furcate lamellae, stem as long as lamellae (Fig. 12 G)............................................................................... C. (L.) subletteorum 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 A–D).......................................... C. (L.) latissimus sp. nov.
–. Hind tibia without stout bristle apically; labia with posteromedian margins parallel-sided, smoothly rounded caudally, gonapophysis VIII extensive (Figs 6, 13: A, B)................................................................... 9
9. Vaginal floor moderately wide, covering about one-sixth of anterior part of vagina (Fig. 6 A, B)........................................................................................................ C. (L.) crusculus (Saether)
–. Vaginal floor large, covering over one-third of anterior part of vagina (Fig. 13 A, B).......... C. (L.) subletteorum sp. nov.
description: Published as part of Giłka, Wojciech, 2011, Six unusual Cladotanytarsus Kieffer: towards a systematics of the genus and resurrection of Lenziella Kieffer (Diptera: Chironomidae: Tanytarsini), pp. 1-34 in Zootaxa 3100 on pages 30-31, DOI: 10.5281/zenodo.202994