Parapsectrocladius Cranston

Donato, Mariano, Mauad, Melina & Fuentes, María Cecilia, 2015, A new species of Parapsectrocladius Cranston (Diptera: Chironomidae: Orthocladiinae) from Patagonia, Argentina, Zootaxa 3911 (4), pp. 547-559 : 549

Key to the male imagines of Parapsectrocladius Cranston (modified from Cranston, 2000)

1. Base of anal point evenly tapering anteriorly to merge with tergite. Inferior volsella rounded and without any dorsal ridge... 2

- Base of anal point flanked by setose protuberances. Inferior volsella with substantial dorsally-directed sclerotised ridge... 4

2. Anal point rounded, rather densely setose to apex; inferior volsella distinctly bilobed, dorsal lobe rounded apically.......................................................................................... P. acuminatus (Edwards)

- Anal point tapering triangular; inferior volsella simple, apically bluntly triangular.................................. 3

3. Inner margin of inferior volsella with fine setae ( Fig 2 B of Cranston 2000).......... P. escondido Cranston et Añón Suárez

- Inner margin of inferior volsella with strong setae ( Fig. 3 )....................................... P. setosus sp. nov.

4. Gonostylus more normal length, not extending to anal point apex when reflexed....................... P. reissi Cranston

- Gonostylus very long, extending to anal point base when reflexed............................. P. longistylus Cranston

Figures

FIGURES 1 – 3. Parapsectrocladius setosus sp. nov., male. 1, Hypopygium, dorsal aspect; 2, Hypopygium with tergite IX removed, dorsal aspect to the left, ventral aspect to the right; 3, Inferior volsella.