A new miniature Priocharax from the río Putumayo drainage, Amazonas State, Colombia (Teleostei: Characiformes: Characidae) with an unusual skin flap between pelvic fins Author Mattox, George Mendes Taliaferro 0000-0003-4748-472X Laboratório de Ictiologia de Sorocaba, Departamento de Biologia, Universidade Federal de São Carlos, 18052 - 780, Sorocaba, São Paulo, Brazil. gmattox@ufscar.br Author Acosta-Santos, Astrid 0000-0003-2927-9298 Instituto Amazónico de Investigaciones Cientificas (SINCHI), Grupo de Ecosistemas Acuáticos, Avenida Vásquez Cobo entre Calles 15 y 16, Leticia, Amazonas, Colombia. aacosta@sinchi.org.co Author Bogotá- Gregory, Juan D. 0000-0001-9732-4703 Instituto Amazónico de Investigaciones Cientificas (SINCHI), Grupo de Ecosistemas Acuáticos, Avenida Vásquez Cobo entre Calles 15 y 16, Leticia, Amazonas, Colombia. juandbogota@gmail.com Author Agudelo, Edwin 0000-0001-9318-2568 Instituto Amazónico de Investigaciones Cientificas (SINCHI), Grupo de Ecosistemas Acuáticos, Avenida Vásquez Cobo entre Calles 15 y 16, Leticia, Amazonas, Colombia. eagudelo@sinchi.org.co Author Lima, Flávio C. T. 0000-0001-8680-2669 Museu de Diversidade Biológica, Universidade Estadual de Campinas, Rua Monteiro Lobato, 255, 13083 - 682, Campinas, São Paulo, Brazil. fctlima@gmail.com text Zootaxa 2025 2025-01-28 5575 4 545 554 https://doi.org/10.11646/zootaxa.5575.4.4 journal article 10.11646/zootaxa.5575.4.4 62838b18-f0a3-42a8-a511-c08460452723 1175-5326 14762751 E3FF94C7-BC3E-4FB8-92DE-D6F1187ECC8A

TABLE 1. Morphometric data of Priocharax rex sp. nov. N = number of specimens; SD = Standard Deviation. Range includes the holotype.

	Holotype	N	Range	Mean	SD
Standard length (SL) (mm)	19.8	15	15.9–20.7	18.5	-
Percentages of Standard Length
Depth at dorsal-fin origin	27	15	19–27	24.6	2.0
Snout to dorsal-fin origin	54	15	51–54	52.9	0.8
Snout to pelvic-fin origin	45	15	42–50	46.1	2.1
Snout to anal-fin origin	59	15	56–64	60.5	2.6
Dorsal-fin length	26	15	25–28	26.2	1.0
Dorsal-fin base	12	15	10–14	11.9	1.1
Pelvic-fin length	9	15	9–14	11.0	1.3
Anal-fin length	23	15	20–24	22.3	1.0
Anal-fin base	30	15	26–31	29.1	1.5
Caudal-peduncle depth	9	15	6–10	8.3	0.9
Caudal-peduncle length	15	15	14–20	16.2	1.5
Head length (HL)	26	15	25–30	26.6	1.5
Percentages of head length
Orbital diameter	32	15	31–40	33.9	2.2
Interorbital distance	32	15	24–33	30.2	2.6
Snout length	23	15	21–27	23.0	1.9
Upper jaw length	41	15	34–53	42.5	5.4
Percentages of caudal peduncle length
Caudal-peduncle depth	61	15	42–61	51.5	6.3
Percentages of orbital diameter
Snout length	73	15	57–75	68.1	6.0