A new species of the genus Cottus (Scorpaeniformes, Cottidae) from the Baltic Sea Basin and its phylogenetic placement Author Sideleva, Valentina BFD8059B-3742-480A-A3C6-92755FA0BDCB Zoological Institute, Russian Academy of Sciences, Universitetskaya Emb. 1, 199034, Saint Petersburg, Russia. vsideleva@gmail.com Author Kesminas, Vytautas 981ADCD9-39DD-4F09-9A64-07CA44C01360 Institute of Ecology, Nature Research Centre, Akademijos Str. 2, LT- 08412, Vilnius, Lithuania. v.kesminas1@gmail.com Author Zhidkov, Zakhar 320D9549-CC0A-4E13-9A9E-A437B5A13F49 Zoological Institute, Russian Academy of Sciences, Universitetskaya Emb. 1, 199034, Saint Petersburg, Russia. zhidkovz@gmail.com text European Journal of Taxonomy 2022 2022-08-09 834 38 57 http://dx.doi.org/10.5852/ejt.2022.834.1897 journal article 10.5852/ejt.2022.834.1897 963b39be-625a-4552-9bca-d9e16c6c98a3 2118-9773 6980935 FB37B188-5202-461D-BEA7-B9D23BE346CA

Table 2 (continued on next page). Proportional measurements of type and non-type specimens of Cottus cyclophthalmus sp. nov. from Pregolya, Neman and Venta River systems (Russia, Lithuania). Note: numerator = mean (M) ± standard deviation (SD); denominator = range.

	Krasnaya R. (n = 9)	Neris R. (n = 19)	Zeimena R. (n = 10)	Siesartis R. (n = 10)	Šerkšnė R. (n = 10)
	Type specimens		Non-type	specimens
SL, mm	63.3 48.7–83.3	61.6 51.4–74.1	65.6 56.9–72.1	62.3 56.1–69.7	61.4 48.8–79.2
In % SL†
Predorsal length	36.3 ± 0.9 34.9–37.3	36.3 ± 1.3 34.8–39.7	34.9 ± 1.2 32.4–36.5	35.4 ± 0.5 34.7–36.2	34.9 ± 1.2 32.4–36.5
Postdorsal length	10.8 ± 1.0 8.9–12.2	10.3 ± 0.8 9.0–12.5	9.9 ± 1.2 8.2–11.9	10.0 ± 0.3 9.6–10.3	9.9 ± 1.2 8.2–11.9
Preanal length	54.9 ± 2.1 51.7–58.4	53.6 ± 1.5 51.0–56.2	55.0 ± 2.0 51.9–57.2	54.2 ± 0.4 53.5–54.9	55.0 ± 2.0 51.9–57.2
Postanal length	47.2 ± 1.9 42.6–48.9	48.2 ± 1.6 45.1–50.5	46.8 ± 1.6 43.6–48.6	47.7 ± 0.7 46.2–48.8	46.8 ± 1.6 43.6–48.6
Maximum body depth	22.7 ± 1.2 21.2–24.8	21.9 ± 1.2 20.0–23.8	20.5 ± 0.9 19.3–21.7	21.5 ± 0.5 20.7–22.3	20.5 ± 0.9 19.3–21.7
Length of caudal peduncle	15.4 ± 1.1 14.0–17.2	15.1 ± 1.1 13.0–16.9	14.7 ± 1.4 12.7–16.6	14.9 ± 0.2 14.5–15.3	14.7 ± 1.4 12.7–16.6
Depth of caudal peduncle	7.4 ± 0.5 6.9–8.5	7.4 ± 0.5 6.8–8.7	7.0 ± 0.4 6.4–7.9	7.0 ± 0.2 6.6–7.4	7.0 ± 0.4 6.4–7.9
Length of first dorsal fin base	13.6 ± 1.0 12.1–15.1	13.8 ± 0.7 12.3–15.4	13.5 ± 0.8 12.1–14.7	13.6 ± 0.2 13.3–13.9	13.5 ± 0.8 12.1–14.7
Length of second dorsal fin base	36.0 ± 0.9 34.6–37.2	36.8 ± ± 1.5 32.3–39.1	36.5 ± 1.7 33.0–38.5	38.1 ± 0.4 37.2–38.7	36.5 ± 1.7 33.0–38.5
Length anal fin base	28.7 ± 0.9 27.6–30.1	28.7 ± 1.4 26.3–31.2	28.3 ± 1.4 26.6–31.0	29.9 ± 0.4 29.1–30.4	28.3 ± 1.4 26.6–31.0
Length of longest first dorsal fin spines	8.8 ± 0.7 7.4–9.7	8.8 ± 0.9 7.2–10.3	8.0 ± 0.9 6.6–9.3	9.1 ± 0.3 8.7–9.8	8.0 ± 0.9 6.6–9.3
Length of longest second dorsal fin ray	13.1 ± 0.6 12.2–13.9	13.6 ± 0.7 12.6–15.2	13.3 ± 0.9 11.4–14.5	13.4 ± 0.3 12.9–14.1	13.3 ± 0.9 11.4–14.5
Length of longest A ray	14.0 ± 1.1 12.4–15.8	13.8 ± 0.8 12.8–15.6	13.5 ± 0.6 12.4–14.5	14.1 ± 0.6 13.2–15.0	13.5 ± 0.6 12.4–14.5
Pectoral fin length	26.8 ± 1.0 25.7–28.6	28.6 ± 1.5 25.4–32.3	25.9 ± 1.4 23.8–28.9	26.2 ± 0.8 25.1–27.9	25.9 ± 1.4 23.8–28.9
Pelvic fin length	20.0 ± 0.8 18.3–21.2	20.2 ± 1.3 17.9–23.2	19.0 ± 0.8 18.0–20.6	19.7 ± 0.5 18.8–20.4	19.0 ± 0.8 18.0–20.6
Head length	33.2 ± 1.3 31.3–35.7	32.6 ± 1.0 30.6–34.4	32.0 ± 1.2 30.0–33.7	32.3 ± 0.9 31.2–33.9	32.0 ± 1.2 30.0–33.7
Postorbital length	17.2 ± 0.9 15.6–18.8	17.1 ± 0.6 16.0–18.1	16.1 ± 1.0 14.7–17.7	16.9 ± 0.7 16.1–18.3	16.1 ± 1.0 14.7–17.7
Head depth	20.3 ± 1.3 18.3–22.1	19.5 ± 1.1 17.1–21.3	19.2 ± 1.0 17.7–20.6	19.5 ± 0.6 18.6–20.4	19.2 ± 1.0 17.7–20.6
Head width	31.5 ± 1.6 28.6–34.6	29.3 ± 2.2 24.9–33.3	29.3 ± 1.3 26.5–30.9	29.0 ± 0.7 27.8–30.1	29.3 ± 1.3 26.5–30.9