Gymnometriocnemus Edwards, 1932

Chamutiová, Tímea, Hamerlík, Ladislav & Bitušík, Peter, 2020, Subfossil chironomids (Diptera, Chironomidae) of lakes in the Tatra Mountains an illustrated guide, Zootaxa 4819 (2), pp. 216-264 : 237

Gymnometriocnemus Edwards / Bryophaenocladius Thienemann ( Fig. 47 )

Head capsule yellow to light brown, occipital margin pale or darkened.Antenna with 5 segments of variable lengths. Premandible with 3 teeth. Apical mandibular tooth shorter than combined width of 3 inner teeth. Mentum dark brown with paired, relatively broad and rounded median teeth and 4 pairs of lateral teeth gradually decreasing in size. Ventromental plates distinct, sclerotized, not extending beyond outer lateral tooth, reminding ears and visible at the first sight ( Fig. 47 ).

Remarks: Without body and antennae, larval Gymnometriocnemus virtually cannot be distinguished from Bryophaenocladius .

Bryophaenocladius muscicola (Kieffer, 1906) and B. cf. subvernalis (Edwards, 1929) are known from the Tatra Mts. lakes ( Bitušík 2004).

Subfossils were recorded in low abundance but relatively frequently in the studied lakes.

Figures

FIGURES 43–48. Eukiefferiella brevicalcar-type: 43—head capsule. Eukiefferiella claripennis-type B: 44—head capsule. Eukiefferiella devonica-type: 45—head capsule. Eukiefferiella fittkaui-type: 46—head capsule. Gymnometriocnemus/Bryophaenocladius: 47 (arrow indicates ventromental plate). Heterotrissocladius marcidus-type: 48—antenna.