Nilodosis Kieffer 1921

Tang, Hongqu & Cranston, Peter S., 2017, Review of Nilodosis Kieffer (Diptera: Chironomidae: Chironominae), with description of a new species from South China, Zootaxa 4353 (2), pp. 339-346 : 340

Nilodosis Kieffer 1921

Diagnosis. The specimens examined conform in most diagnostic features to the generic description for adult and pupa ( Cranston & Spies 1999). Based on the material described below, the generic diagnosis for Nilodosis adult and pupa should be amended as follows.

Adult male. AR 1.33–2.60. Acrostichals uniserial or biserial, starting from the anterior scutum. Anal lobe of wing rounded or reduced. Mid and hind tibiae with 2 separated or 1 fused comb; if separated, with 2 short straight spurs, if fused, with curved spur. Foreleg ratio 1.7–2.2, distinctive leg colour pattern in some species. Anal point varied: slightly spatulate with rounded apex ( N. fusca ), parallel-sided ( N. grisea ) or slightly pointed ( N. austrosinensis sp. n.).

Adult female. Antenna with 5 or 6 flagellomeres. Gonapophysis VIII simple ( N. austrosinensis sp. n.) or with both dorsomesal and ventrolateral lobes ( N. fusca ). Apodeme lobe visible ( N. fusca ) or reduced ( N. austrosinensis sp. n.).

Pupa. Thoracic horn plumose or with several branches. Antepronotals present or absent. Tergite II–VII with fine spinules, T VIII with or without spinules. Sternites bare or with special pattern on S I–III, and one pair of anterior spinule patches on S VI–VIII.

Larva. See Cranston & Spies (1999) and Tang & Yamamoto (2012).