Subfossil chironomids (Diptera, Chironomidae) of lakes in the Tatra Mountains an illustrated guide Author Chamutiová, Tímea 0000-0002-8439-4582 peter. bitusik @ umb. sk; https: // orcid. org / 0000 - 0002 - 8439 - 4582 peter.bitusik@umb.sk Author Hamerlík, Ladislav 0000-0002-0803-8981 ladislav. hamerlik @ umb. sk; https: // orcid. org / 0000 - 0002 - 0803 - 8981 ladislav.hamerlik@umb.sk Author Bitušík, Peter 0000-0003-4375-7727 timea. chamutiova @ umb. sk; https: // orcid. org / 0000 - 0003 - 4375 - 7727 timea.chamutiova@umb.sk text Zootaxa 2020 2020-07-23 4819 2 216 264 journal article 8924 10.11646/zootaxa.4819.2.2 8e35f5ad-f97e-432a-9005-3da1fd0bb897 1175-5326 4396828 2459A542-6CF2-4545-9E6F-262C68838D99 Pseudodiamesa nivosa - type ( Figs 17–19 ) This is a new morphotype, not listed in Brooks et al . (2007) . Antennal ratio ≥ 2.5 ( Fig. 17A ). Pecten epipharyngis is characterized by even number (3–4 pairs) strongly sclerotized scales. Labral lamellae present between bases of SI setae. Premandible with more than 10 teeth ( Fig. 19 ). Mandibular seta interna consists of 14–24 branches ( Fig. 18 ). Mentum with a lighter median tooth compared to the black lateral teeth; outermost lateral teeth are more visible in unflatten mentum ( Fig. 17 ). However, be aware of the fact that first and second instar larvae of both morphotypes has broad median mental tooth that is lighter than the blackish lateral teeth ( Figs 20, 21 ), thus young instars are not sufficient for morphotype identification. Remarks: This morphotype was the most frequent Diamesinae remain in surface sediments of the Tatra Mts. lakes. Its distribution is consistent with the knowledge of the ecology of the nivosa species group. It is more coldadapted than the P. branickii group, which occurs under more moderate conditions ( Ilyashuk et al . 2010 ; Hamerlík et al . 2017 ). One species of the species group, P. nivosa Goetgehebuer, 1928 , was recorded in the Tatra Mts. ( Novikmec et al . 2015 ).