Parorthocladius Thienemann, 1935

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 : 242

Parorthocladius Thienemann ( Fig. 59 )

Head capsule brownish, triangular in shape. Occipital margin dark brown. Antenna 5-segmented. Premandible simple, with one apical tooth. Apical mandibular tooth shorter than combined width of 3 inner teeth. Mentum subtriangular with three equal sized median teeth and 4 pairs of lateral teeth steeply sloping reminding a ladder. Ventromental plates narrow with beard consisting of a tuft of long setae (often missing in the subfossil material).

Remarks: The larval head of Parorthocladius and Synorthocladius are very similar, however Synorthocladius has two very long median teeth on mentum, while Parorthocladius three (and not as long). The only known species from the Tatra Mts. lakes is P. nudipennis (Kieffer, 1908) ( Bitušík 2004) .

Subfossil remains were found rarely.

Figures

FIGURES 54–59. Metriocnemus fuscipes-type: 54—head capsule. Orthocladius (Orthocladius) dentifer-type: 55—head capsule. Orthocladius (Mesorthocladius) frigidus: 56—head capsule (arrow indicates seta submenti). Orthocladius (Euorthocladius): 57—head capsule. Parametriocnemus/Paraphaenocladius: 58 (arrow indicates seta submenti). Parorthocladius: 59—head capsule.