First record of Parochlus kiefferi (Garrett, 1925) in a sediment sequence from a Slovak mountain lake with notes on paleolimnological interpretation

Martina Jambrović, Dubravka Čerba, Ladislav Hamerlik — Tue, 28 Mar 2023 00:00:00 +0000

Subfossil larval remains of a rare Podonominae, Parochlus kiefferi (Garrett, 1925), were identified in a sediment sequence from a mountain lake in the Low Tatra Mountains, Slovakia, and represent the first record of the species for Slovakia. The depth at which the P. kiefferi remains were found, along with the taxonomic composition of the corresponding chironomid assemblage dominated by cold-stenothermal taxa, indicate that the sample can be dated back to the Little Ice Age. Additionally, notes on the chironomid remains which appear in the sediment sample are provided here and can offer further insight into paleolimnological interpretation.

The pupa of Chironomus decorus Johannsen, 1905 – additional description and an unusual sexual dimorphism

Jon Martin — Wed, 20 Sep 2023 00:00:00 +0000

In his original description of Chironomus decorus, Johannsen included a brief description of the pupa but with insufficient detail to differentiate it from other North American species, particularly those of the decorus-complex. In this note, further information of pupal characters, mostly derived from specimens reared from egg masses, are given which allow separation of these pupae from those of some other species, e.g., presence of frontal warts, and in the case of the males, to permit accurate identification by the presence of a small secondary tubercle.

CHIRONOMUS Journal of Chironomidae Research

First record of Parochlus kiefferi (Garrett, 1925) in a sediment sequence from a Slovak mountain lake with notes on paleolimnological interpretation

The pupa of Chironomus decorus Johannsen, 1905 – additional description and an unusual sexual dimorphism