Synorthocladius 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 : 244

Synorthocladius Thienemann ( Figs 66, 67 )

Head capsule yellow, triangular in shape. Antenna 5-segmented. Premandible with one apical tooth. Mandible with 3 inner teeth and short apical tooth, mola with one strong spine ( Fig. 67 ). Mentum triangular with two median teeth and 4 or 5 pairs of lateral teeth sloping steeply ( Fig. 66A ). Ventromental plates narrow and long with strong beard (may be missing in subfossil material).

Remarks: Larval Synorthocladius and Parorthocladius are similar, however the mentum of Synorhocladius has 2 median teeth on its apex.

Only one Holarctic species, Synorthocladius semivirens (Kieffer, 1909) is known and it was identified from several Tatra Mts. lakes ( Bitušík 2004).

Subfossil remains were found rarely, only in two studied lakes.

Figures

FIGURES 66–71. Synorthocladius: 66—head capsule, A—detail of mentum. Synorthocladius: 67—mandible (arrow indicates spine). Thienemanniella clavicornis-type: 68—head capsule. Tvetenia bavarica-type: 69—head capsule (arrow indicates seta submenti). Zalutschia mucronata-type: 70—head capsule, A—antenna, blade longer than flagellum. Zalutschia type B: 71—head capsule.