Chironomidae (Diptera) from mountain lakes of the Eastern Carpathians, Romania: First records and insight into diversity Author Bitušík, Peter 0000-0002-8439-4582 Faculty of Natural Sciences, Matej Bel University, Tajovského 40, SK- 974 01 Banská Bystrica, Slovakia Author Slobodníková, Veronika 0000-0003-4098-5791 Faculty of Natural Sciences, Matej Bel University, Tajovského 40, SK- 974 01 Banská Bystrica, Slovakia Author Novikmec, Milan 0000-0002-5192-4575 Faculty of Ecology and Environmental Sciences, Technical University in Zvolen, T. G. Masaryka 24, SK- 960 01 Zvolen, Slovakia Author Dudáš, Adam 0000-0001-5517-9464 Faculty of Natural Sciences, Matej Bel University, Tajovského 40, SK- 974 01 Banská Bystrica, Slovakia Author Hamerlík, Ladislav 0000-0002-0803-8981 Faculty of Natural Sciences, Matej Bel University, Tajovského 40, SK- 974 01 Banská Bystrica, Slovakia & Institute of Zoology, Slovak Academy of Sciences, Dúbravská cesta 9, SK- 845 06 Bratislava, Slovakia text ZooKeys 2025 2025-03-28 1233 107 123 journal article 308856 10.3897/zookeys.1233.142856 1c9757ea-cf34-40ae-8e21-87b3d019d58b 1738A1F8-BF8D-4753-A4CF-EA8970EF5592

Table 2. A tentative identification key for Procladius choreus and P. sagittalis based on thoracic horn characteristics, using the decision tree classifier of Custode and Iacca (2023).

Question number	Question text	Result
		Yes	No
1	Is the length of the thoracic horn ≤ 469 μm?	P. sagittalis	2
2	Is the diameter of the plastron plate ≤ 93 μm?	3	4
3	Is the length of the thoracic horn ≤ 478 μm?	5	P. choreus
4	Is the breadth of the thoracic horn ≤ 144 μm?	P. choreus	P. sagittalis
5	Is the length of the thoracic horn ≤ 476 μm?	P. choreus	P. sagittalis