Allocladius Kieffer

Ferrington Jr, Leonard C. & Saether, Ole A., 2011, A revision of the genera Pseudosmittia Edwards, 1932, Allocladius Kieffer, 1913, and Hydrosmittia gen. n. (Diptera: Chironomidae, Orthocladiinae) 2849, Zootaxa 2849 (1), pp. 1-314 : 48-49

Key to male imagines of Allocladius Kieffer

1. With single or double pars ventralis....................................................................... 2

– Pars ventralis absent.................................................................................... 9

2. With two large pars ventralis reaching to 0.50–0.76 gonocoxite length ( Fig. 30 A ); Neotropical.................................................................................................. A. neobilobulatus (Paggi) (p. 96)

– With single, small to large pars ventralis at most reaching to 0.45 gonocoxite length................................. 3

3. Anal point about 80 µm long; accessory lobe of inferior volsella absent ( Fig. 31 E ); Palaearctic.................................................................................................... A. bothnicus (Tuiskunen) (p. 93)

– Anal point shorter; accessory lobe of inferior volsella absent to well developed; Neotropical and Afrotropical............ 4

4. Pars ventralis small (about 18–36 µm long) digitiform; accessory lobe of inferior volsella well developed, reaching much further posterior than inferior volsella; Argentina...................................... A. bilobulatus (Edwards) (p. 99)

– Pars ventralis longer (about 45–90 µm long) digitiform, rounded or square; accessory lobe of inferior volsella absent to well developed, when well developed not reaching much further posterior than inferior volsella........................... 5

5. Pars ventralis much longer than broad, digitiform; Ecuador................ A. scrotus Andersen, Saether et Mendes (p. 93)

– Pars ventralis as wide as or wider than long, circular, triangular or square......................................... 6

6 Pars ventralis square, much wider than long; Chile...................... A. quadrus Andersen, Saether et Mendes (p. 96)

– Pars ventralis sphaeroid to bluntly triangular, about as wide as long.............................................. 7

7. Pars ventralis with setae, sphaeroid; Chile............................ A. globosus Andersen, Saether et Mendes (p. 97)

– Pars ventralis without setae, triangular to circular............................................................. 8

8. Pars ventralis bluntly triangular, AR 1.14–1.35; Afrotropical........................... A. rectilobus (Freeman) (p. 91)

– Pars ventralis circular, AR 1.36–1.65; Afrotropical........................................ A. deborae sp. n. (p. 97)

9. Apparently only 2 acrostichals; superior volsella slightly developed as basal swelling fused with long, narrow and adpressed inferior volsella without accessory lobe; supraalar absent; costal extension long; Argentina. A. fortispinatus (Edwards) (p. 90)

– Three or more acrostichals; superior volsella barely indicated or well developed, not fused with not adpressed inferior volsella; supraalar usually present; costal extension short or absent except in A. hirticaudatus sp. n........................... 10

10. Accessory lobe of inferior volsella large, lobe-like, free at apex................................................ 11

– Accessory lobe adpressed, weak or absent................................................................. 17

11. Superior volsella consisting of rounded, well developed basal swelling of inner margin of gonocoxite.................. 12

– Superior volsella barely indicated ( Fig. 6 F ); Australia................................... A. wirthi (Freeman) (p. 53)

12. Virga consisting of weak median plate, which is often difficult to distinguish, and 2 lateral groups of spinules ( Fig. 23 E, F ); Holarctic....................................................................... A. nanseni (Kieffer) (p. 66)

– Virga consisting of a small, single, rounded, usually dark sclerotized plate without lateral spine groups.................13

13. Both inferior volsella and accessory lobe long and narrow ( Fig. 11 F ), costa not extended; Kenya,? Uganda................................................................................................ A. niger Kieffer (p. 77)

– Inferior volsella triangular, accessory lobe broad and rounded; costa usually slightly extended........................ 14

14. AR about 0.3, no supraalar, antepronotal lobes slightly reduced medially; Turkey, China.......... A. caspersi sp. n. (p. 51) – AR 0.8–1.8, 1 supraalar, antepronotal lobes medially well developed............................................ 15

15. R 4+5 ending distal to apex of M 3+4, AR 1.12–1.44; China................................. A. aizaiensis (Wang) (p. 63)

– R 4+5 ending slightly to well proximal to apex of M 3+4, AR either about 0.84 or 1.42–1.77............................ 16

16. R 4+5 ending well proximal to apex of M 3+4, AR about 0.84, wing length about 1.5 mm; Afrotropical....................................................................................................... A. salti (Freeman) (p. 75)

– R 4+5 ending slightly proximal to apex of M 3+4, AR 1.42–1.77, wing length 1.83–2.16 mm; Tanzania...................................................................................................... A. soemmei sp. n. (p. 59)

17. Superior volsella consisting of rounded, well-developed basal swelling of inner margin of gonocoxite.................. 18

– Superior volsella weak or absent......................................................................... 20

18. Superior volsella projecting lobe-like posteriorly ( Fig. 15 E ); Ethiopia......................... A. bubatus sp. n. (p. 83)

– Superior volsella rounded.............................................................................. 19

19. Inferior volsella with adpressed weak accessory lobe; R 4+5 ending slightly proximal to apex of M 3+5; AR 1.18–1.45; LR 1 0.42– 0.46, LR 2 0.43–0.47, LR 3 0.50–0.54; Afrotropical.................................... A. conigerus (Freeman) (p. 79)

– Inferior volsella without accessory lobe, R 4+5 ending above apex of M 3+4; AR 0.75–0.95; LR 1 0.47–0.50, LR 2 0.48–0.53, LR 3 0.55–0.60; The Azores............................................................. A. azoricus (Storå) (p. 88)

20. Anal point absent, ridge-like or less than 20 µm long; inferior volsella digitiform, slightly curved..................... 21

– Anal point 30–43 µm long narrow, nearly parallel-sided, with laterally directed setae at apex; inferior volsella weak; Tanzania............................................................................. A. hirticaudatus sp. n. (p. 57)

21. Anal tergite apparently with complex anal point or perhaps a longitudinal ridge in place of anal point; AR about 0.6, LR 1 0.45, LR 2 0.46, LR 3 0.49; Japan........................................................ A. jintuoctavus (Sasa) (p.57)

– Anal point absent or present, but not complex, AR about 0.8 or about 1.4......................................... 22

22. Anal point absent, AR about 0.8, LR 1 0.49, LR 2 0.49, LR 3 0.55; Austria, Poland.............. A. longicrus (Kieffer) (p. 84)

– Anal point about 16 µm long, AR about 1.4, LR 1 0.43, LR 2 0.44, LR 3 0.50; China.............. A. wangorum sp. n. (p. 78)

Figures

FIGURE 6. A–Preferred synapomorphy diagram for Allocladius Kieffer, Hydrosmittia gen. n. and Pseudosmittia Edwards; B– Area cladogram for the species in the preferred synapomorphy diagram.

FIGURE 11. Allocladius spp., males. A—A. jintuoctavus (Sasa) comb. n. B—G. A. hirticaudatus sp. n. B—cibarial pump and stipes; C—wing; D—head; E—third palpomere; F—hypopygium, left dorsal aspect, right ventral aspect; G—virga.

FIGURE 15. Allocladius nanseni (Kieffer) comb. n., male. A—wing; B—head; C—third palpomere; D—cibarial pump and stipes; E—virga; F—hypopygium, left dorsal aspect, right ventral aspect.

FIGURE 23. Allocladius bubatus sp. n., male. A—wing; B—head; C—cibarial pump and stipes; D—virga; E—hypopygium, left dorsal aspect, right ventral aspect.

FIGURE 30. Allocladius spp. A–E, A. bothnicus (Tuiskunen), immmatures. A—male genital sheath of pupa; B—larval antenna; C—premandible; D—mandible; E—mentum. F–G, A. scrotus Andersen, Saether et Mendes. F—hypopygium; G— pars ventralis [A–E after Makarchenko & Makarchenko 2007, F–G from Andersen et al. 2010].

FIGURE 31. Allocladius deborae sp. n., male. A—wing; B—head; C—cibarial pump, tentorium and stipes; D—thorax; E— hypopygium, showing pars ventralis; F—hypopygium, left dorsal aspect, right ventral aspect.