Tanytarsus van der Wulp

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 : 257

Tanytarsus van der Wulp ( Fig. 103–108 )

Head capsules yellow to brownish with dark brown to black occipital margin. Occipital plate present, well developed. Antenna placed on tall pedestal (2–3 times as long as broad), usually without distal tooth or spur (if present, it is of different shape as in Micropsectra , see Brooks et al. 2007). Lauterborn organs usually on long pedicels. Premandible with 3 (usually) to 5 apical teeth. Mandible with 2–3 inner teeth, 1–2 dorsal teeth and in some species/ morphotypes 1–2 surficial teeth may be present additionally. Mentum with a single rounded or laterally notched median tooth and 5 pairs of lateral teeth. Ventromental plates narrowly separated medially, long, narrow and fine striated.

Remarks: As mentioned above, there are considerable difficulties to distinguish head capsules of Tanytarsus from Micropsectra and, to a lesser extent, from Paratanytarsus (see comments to Micropsectra and Paratanytarsus ).

Five Tanytarsus species were confirmed in the Tatra Mts. lakes: Tanytarsus bathophilus Kieffer, 1911 , T. gibbosiceps Kieffer, 1922 , T. gregarius Kieffer, 1909 , T. nemorosus Edwards, 1929 and T. pallidicornis (Walker, 1856) ( Bitušík et al. 2006a; Giłka 2007).

Three morphotypes were distinguished following Brooks et al. (2007).

Figures

FIGURES 99–104. Paratanytarsus austriacus-type: 99—head capsule. P. austriacus-type: 100—mandible. Paratanytarsus pencillatus-type: 101—head capsule. P. penicillatus-type: 102—mandible. Tanytarsus lugens-type: 103—head capsule. T. lugens-type: 104—mandible.

FIGURES 105–109. Tanytarsus mendax-type: 105—head capsule. T. mendax-type: 106—mentum. Tanytarsus pallidicornis- type: 107—head capsule. T. pallidicornis-type: 108—antenna. Tanytarsini indet.: 109—head capsule.