Pseudodiamesa branickii, Nowicki, 1873

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 : 223

Pseudodiamesa branickii - type ( Figs 14–16 )

This is a new morphotype, not listed in Brooks et al. (2007).

Antennal ratio (length of basal segment/ length of flagellum) ˂ 2.5 ( Fig. 14 ). Pecten epipharyngis consists of seven, weakly sclerotized scales. Labral lamellae absent. Premandible with 7–9 teeth ( Fig. 16 ). Mandibular seta interna consists of 9–15 branches ( Fig. 15 ). All teeth of mentum unicolored, black, fourth to seventh lateral teeth are hardly visible in unflatten mentum ( Fig. 14 ).

Remarks: Subfossil remains have been recorded only in three lakes. In the Tatra Mts. lakes, the morphotype contains a single species, P. branickii Nowicki, 1873 ( Bitušík et al. 2006a; Novikmec et al. 2015).

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).

FIGURES 15–22. Pseudodiamesa branickii-type: 15— mandible (arrow indicates branches of seta interna). P. branickii-type: 16—detail of pecten epipharyngis and premandible (arrows indicate seven scales of pecten epipharyngis and 8–9 teeth of the premandible). Pseudodiamesa nivosa-type: 17—head capsule, A—antenna. P. nivosa-type: 18—mandible (arrow indicates branches of seta interna). P. nivosa-type: 19—detail of pecten epipharyngis and premandible (arrows indicate premandible teeth, SI setae and detail of labral lamellae). Pseudodiamesa: 20—young instar head capsule. Pseudodiamesa: 21—detail of mentum. Pseudokiefferiella parva: 22—head capsule.