Procladius Skuse from Lake Winnipeg, Manitoba, Canada, with keys to some females and immature stages of the genus (Diptera: Chironomidae)

Abstract

Procladius (Holotanypus) rugulosus sp. n. from Lake Winnipeg, Manitoba, Canada, is described as male, female and pupa. Six additional species of Procladius Skuse are recorded from Lake Winnipeg of which 5 belong to the most common species in the lake. The immature stages of P. (Psilotanypus) bellus (Loew), P. (Holotanypus) culiciformis (L.), P. (H.) denticulatus Sublette, P. (H.) freemani Sublette, and P. (H.) sublettei Roback are redescribed. Species keys are given to sufficiently known Nearctic females, to pupae of Lake Winnipeg, and to Nearctic larvae of Procladius. The distribution of Procladius in Lake Winnipeg is mapped and discussed. The separation of larval instars is shown approximately to follow Dyar's rule.

Descriptions of four Nearctic Procladius Skuse pupal exuviae

“…As only the second specimen reported, after the holotype, adult and larval traits were included for comparison to Sublette (1964) and Roback (1971). In Roback (1980) this specimen keys to couplet 18 for P. freemani, and in Saether (2010) to couplet 9 and P. freemani. With only a single specimen, it is not certain that any feature can be used to distinguish P. barbatulus from P. freemani in the pupal stage.…”