Chasmatonotus Loew, 1864

Namayandeh, Armin, Hudson, Patrick L., Bogan, Daniel L. & Hudson, John P., 2024, Chironomidae (Diptera: Insecta) of Alaska, USA, with descriptions of new species and a checklist, Zootaxa 5511 (1), pp. 1-95 : 55

Chasmatonotus Loew, 1864

Coquillett (1900) described Chasmatonotus univittatus from Alaska based on five adult males collected near Sitka on June 16, 1899. The habitat of the terrestrial larvae in mid-west USA (Ohio) has been described as damp spongy soil with a high humus content and containing sand ( Bolton & Jacobsen 2010). The larva has morphological characteristics similar to other terrestrial taxa such as Smittia , including a reduced number of teeth on the mentum, absence of procercus and anal setae, and reduced posterior parapods (Andersen et al. 2013).