Allocladius Kieffer

Andersen, Trond, Saether, Ole A. & Mendes, Humberto F., 2010, Neotropical Allocladius Kieffer, 1913 and Pseudosmittia Edwards, 1932 (Diptera: Chironomidae) 2472, Zootaxa 2472 (1), pp. 1-77 : 5-6

Key to the males of Neotropical Allocladius Kieffer

1. Pars ventralis and supraalar absent; costal extension long (about 90 µm) ( Figs 17–19 ) ................................................ ................................................................................................................................ A. fortispinatus (Edwards) comb. n.

– With single or double pars ventralis; supraalar usually present; costal extension short, but false vein or dark shadow parallel to costa may give the impression of a long extension...................................................................................... 2

2. With two large pars ventralis reaching to 0.50–0.76 gonocoxite length ( Figs 32–33 ) ................................................... ................................................................................................................................. A. neobilobulatus (Paggi) comb. n.

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

3. Pars ventralis small (18–36 µm long) digitiform; posterior lobe of inferior volsella well developed, reaching much further posterior than inferior volsella ( Figs 5–7 )................................................... A. bilobulatus (Edwards) comb. n.

– Pars ventralis longer (45–90 µm long) digitiform, rounded or square; posterior lobe of inferior volsella absent to well developed, when well developed not reaching much further posterior than inferior volsella ...................................... 4

4. Pars ventralis much longer than broad, digitiform ( Figs 50–51 ) .......................................................... A. scrotus sp. n.

– Pars ventralis as wide as or wider than long, circular to square ................................................................................... 5

5. Pars ventralis spheroid, about as wide as long ( Figs 25–26 ) ............................................................. A. globosus sp. n.

– Pars ventralis square, wider than long ( Figs 43–44 ) ........................................................................... A. quadrus sp. n.

Figures

FIGURES 17–19. Allocladius fortispinatus (Edwards, 1931) comb. n., male. 17—wing; 18—anal point and tergite IX and dorsal aspect of left gonocoxite and gonostylus; 19—hypopygium, ventral aspect of right side.

FIGURES 27–33. Allocladius neobilobulatus (Paggi, 1993) comb. n., male. 27—tentorium, stipes, and cibarial pump; 28—palp; 29—thorax; 30—wing; 31—hypopygium, dorsal aspect; 32—hypopygium with anal point and tergite IX removed, dorsal aspect to the left, ventral aspect to the right; 33—pars ventralis.

FIGURES 1–7. Allocladius bilobulatus (Edwards, 1931) comb. n., male. 1—tentorium, stipes, and cibarial pump; 2— palp; 3—thorax; 4—wing; 5—hypopygium, dorsal aspect; 6—hypopygium with anal point and tergite IX removed, dorsal aspect to the left, ventral aspect to the right; 7—pars ventralis.

FIGURES 45–51. Allocladius scrotus sp. n., male. 45—tentorium, stipes, and cibarial pump; 46—palp; 47—thorax; 48—wing; 49—hypopygium, dorsal aspect; 50—hypopygium with anal point and tergite IX removed, dorsal aspect to the left, ventral aspect to the right; 51—pars ventralis.

FIGURES 20–26. Allocladius globosus sp. n., male. 20—tentorium, stipes, and cibarial pump; 21—palp; 22—thorax; 23—wing; 24—hypopygium, dorsal aspect; 25—hypopygium with anal point and tergite IX removed, dorsal aspect to the left, ventral aspect to the right; 26—pars ventralis.

FIGURES 38–44. Allocladius quadrus sp. n., male. 38—tentorium, stipes, and cibarial pump; 39—palp; 40—thorax; 41—wing; 42—hypopygium, dorsal aspect; 43—hypopygium with anal point and tergite IX removed, dorsal aspect to the left, ventral aspect to the right; 44—pars ventralis.