A new restricted-range Melanorivulus (Cyprinodontiformes: Rivulidae) from the upper rio Guaporé, Chapada dos Parecis, Brazil Author Nielsen, Dalton Tavares Bressane Universidade de Taubaté, UNITAU, Laboratório de Zoologia, Departamento de Biologia, Av. Tiradentes 180, 12030 - 180, Taubaté, SP, Brazil. Author Ohara, Willian Massaharu Universidade Federal do Amazonas, Departamento de Biologia, Av. Rodrigo Otávio, Japiim, 69077 - 000, Manaus, AM, Brazil. text Zootaxa 2024 2024-08-20 5496 3 332 342 http://dx.doi.org/10.11646/zootaxa.5496.3.2 journal article 301882 10.11646/zootaxa.5496.3.2 f4b77c86-3ebb-4a81-89a3-901817fa2ebc 1175-5326 13346783 EE066C4A-88D3-4763-94D4-1F5BFF90ABE4

TABLE 1. Morphometric data for the holotype (H) and paratypes (P) of Melanorivulus melanopterus.

	Holotype Male	Paratypes Males n=14	Paratypes Females n=13
Standard length (mm)	30.2	19.9–27.7	20.6–24.5
Percents of standard length Body depth Caudal peduncle depth Pre-dorsal length	23.5 15.6 73.8	24.0–25.8 12.2–14.0 68.7–72.9	20.5–22.7 13.0–13.2 71.3–75.5
Length of dorsal-fin base Length of anal-fin base Caudal-fin length Pectoral-fin length	14.9 18.5 24.1 20.5	13.4–16.8 17.2–21.7 24.1–27.2 17.7–20.5	11.4–16.3 18.2–18.8 20.1–22.7 19.8-22.1
Head length	28.5	25.9–29.3	28.3–30.9
Percents of head length Head depth Head width Snout length Lower jaw length Eye diameter	74.4 42.9 10.4 20.9 31.4	69.6–79.9 40.0–52.5 11.1–12.9 16.8–19.2 28.4–38.4	56.0–67.7 40.3–44.1 11.9–14.8 18.9–23.8 32.8–37.5