Diamesa bertrami-, 1835

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 : 221

Diamesa bertrami- type ( Fig. 9 )

Head capsule entirely dark brown. Apex of mentum with five tall, prominent teeth, median tooth single, second is taller than first, and 8 pairs of smaller lateral teeth, last one is minute. Mandible with a distinctive shape: first two inner teeth obviously long, second tooth is longer than first one.

Remarks: The D. bertrami - type described by Brooks et al. (2007) has apex of mentum with 6 teeth, i.e. median tooth is double. Rossaro & Lencioni (2015) report a single median tooth in some specimens of D. bertrami .

Figures

FIGURES 9–14. Diamesa bertrami-type: 9—head capsule, A—mandible. Diamesa Tatra-type A: 10—head capsule, A—mandible. Diamesa Tatra-type A: 11—mentum (arrow indicates position of seta submenti). Diamesa Tatra-type B: 12—head capsule (arrows indicate mandible and genal setae). Diamesa Tatra-type B: 13—mentum (arrow indicates position of seta submenti). Pseudodiamesa branickii-type: 14—head capsule (arrow indicates antenna).