Endochironomus Kieffer, 1918

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 : 250-251

Endochironomus Kieffer / Synendotendipes Grodhaus ( Figs 83, 84 )

Head capsule large, yellow, occipital margin dark brown. Antenna 5-segmented, premandible with 2 apical teeth and 1 inner tooth. Mandible with slender apical tooth and 3–4 inner teeth, dorsal tooth pale, hardly visible. Mentum with 3–4 protruding median teeth (central ones lower than outer pairs) and 6 pairs of lateral teeth; the first lower than second and medians. Ventromental plates relatively narrow and gently curved with smooth anterior margin and continuously striated ( Fig. 83 ).

Remarks: Genus Synendotendipes was erected based on immature stages previously placed in Endochironomus (= species group B, Pinder & Reiss, 1983). As the subfossil heads may lack important characters allowing separation of these genera (mandibula, maxilla), it is reasonable to keep both genera together. In specimens where mandible is present, 4 inner teeth is separating Synendotendipes from Endochironomus with 3 inner teeth.

Subfossils were recorded from dystrophic and acidified lakes of the studied region. These finding correspond very well with known distribution of Endochironomus / Synendotendipes in the Tatra Mts. lakes ( Novikmec et al. 2015).

One morphotype following Brooks et al. (2007) was found.

Figures

FIGURES 79–84. D. nervosus-type: 79—head capsule. D. nervosus-type: 80—ventromental plate. D. notatus-type: 81—head capsule. D. notatus-type: 82—ventromental plate. Endochironomus impar-type: 83—detail of mentum and ventromental plates. E. impar-type: 84—head capsule (arrow indicates four inner teeth of the mandible).