A systematic revision of the genera Georthocladius Strenzke, 1941 and Parachaetocladius Wülker,
1959, and a key to adult males is presented. Two new Holarctic species are diagnosed and described based
on morphological characters of the adult male: Parachaetocladius pyrenaeus sp. n. (Palaearctic region) and
Parachaetocladius broankerothurrie sp. n. (Nearctic region). Additional taxonomic notes on related genera
of Orthocladiinae and synonymies for four species from Japan are also provided, which include:
Parachaetocladius kuramasingularis (Sasa, 1989), Parachaetocladius kamiovatus (Sasa & Hirabayashi, 1993),
and Parachaetocladius sunabaabeus (Tanaka & Sasa, 2001) being the junior synonyms of Parachaetocladius
akanoctavus Sasa & Kamimura, 1987. An updated checklist of both Georthocladius and Parachaetocladius
species with taxonomic remarks, ecology, discussions and a provisional key for adult male are also provided.
A taxonomic diagnosis of chironomid larvae collected from Precambrian Shield headwater streams, Canada, is providedfor 51 species. In addition, the Nearctic distribution is given for each species, including 17 new records, along with and information on their ecology and habitat.
We present the description of Chironomidae (Diptera) collected from Sirwan River watershed in Kurdistan province of Iran. This study is part of a larger monitoring program conducted from 2017 to 2018, surveying the freshwater flora and fauna of this watershed. Over half of the benthic invertebrates collected in this monitoring were Chironomidae, presenting the most diverse group. A total of 35 species of Chironomidae were found in Sirwan River Watershed of which 18 representing new faunistic records for Iran, range extensions for the Palearctic, and three being likely new species. Sirwan River is the largest running water habitat in the province of Kurdistan and an important resource for the local and regional economy. These studies help identify the organisms of freshwater ecosystems and provide useful tools for investigators, making better assessments of water conditions and improving their management.
Chironomidae larvae constituted the largest proportion of benthic invertebrates collected from 99 rivers stretching from northern Labrador (latitude 58°N) to northern parts of Ellesmere Island (82°N). We describe 92 species of Chironomidae (mainly larval forms) providing new descriptions, a revision for the adult female of <em>Parametriocnemus boreoalpinus</em> Gowin <em>et</em> Thienemann, a possible new genus (larval form only), and 9 larval forms that may represent a new species. In addition, new geographical distribution records are specified for 1 Nearctic species, 6 species in Canada, 10 for Labrador, and 17 for Nunavut. This work contributes to Environment Canada’s International Polar Year output (2007-2009).
<p>In this paper we describe an inexpensive and rapid method of constructing an apparatus so that all three stages of individual specimen can be obtained, and that maintains sufficient oxygen during the rearing process.</p>
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