Abstract
The study of the type material of Chironomus (Polypedilum) griseistriatum Edwards, 1931 described from Patagonia lead us to formally transfer the species to Apedilum Townes, 1945 as a new combination, and a reared specimen allows us to describe its pupa. Based on several larvae belonging to Apedilum collected in the proximity of the localities in which the adults and pupae were found, we tentatively describe the larval stage. Subfossil larval head capsules of the same species were found in Laguna Stibnite at 46°S in Chile dated to about 2,500 years ago and in Puerto Blest, Lago Nahuel Huapi at 41°S in Argentina dated about 2,000 years ago. We discuss the habitat of the species based on both modern and subfossil material. Identification keys to male adult, pupae and fourth instar larvae are also provided.
Highlights
Based on several larvae belonging to Apedilum collected in the proximity of the localities in which the adults and pupae were found, we tentatively describe the larval stage
Subfossil larval head capsules of the same species were found in Laguna Stibnite at 46°S in Chile dated to about 2,500 years ago and in Puerto Blest, Lago Nahuel Huapi at 41°S in Argentina dated about 2,000 years ago
Our re-examination of the type material of Chironomus (Polypedilum) griseistriatum described by Edwards (1931) from Patagonia lead us to formally transfer this species to Apedilum as a new combination and reared specimens allow us to describe its pupa
Summary
El estudio del material tipo de Chironomus (Polypedilum) griseistriatum Edwards, 1931 de Patagonia nos permite transferir formalmente la especie a Apedilum Townes, 1945 como una nueva combinación, y la cría de un especimen nos permite describir su pupa. The genus Apedilum was first described by Townes (1945) to include two species, A. elachistum and A. subcinctum. Our re-examination of the type material of Chironomus (Polypedilum) griseistriatum described by Edwards (1931) from Patagonia lead us to formally transfer this species to Apedilum as a new combination and reared specimens allow us to describe its pupa. Based on several larvae belonging to Apedilum collected in the proximity of the localities in which the adults and pupae were found, we tentatively describe the larval stage of this species. We compared these morphotypes with the modern specimens of Apedilum found in northern Patagonia
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