Schizodon unimaculatus, a new species from the lower Rio São Francisco with a reappraisal of the Schizodon species presenting a caudal-peduncle blotch (Teleostei: Anostomidae) Author Garavello, Julio C. 0000-0003-2985-6665 Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Carlos, Rod. Washington Luís, km 235, 13565 - 905, São Carlos, SP, Brazil jgaravello@ufscar.br Author Britski, Heraldo A. 0000-0002-5593-9651 Seção de Peixes, Museu de Zoologia, Universidade de São Paulo, Av. Nazaré, 481, 04218 - 970, São Paulo, SP, Brazil heraldo@usp.br Author Oliveira, Alexandre K. 0000-0003-4482-934X Departamento de Ciências Ambientais, Universidade Federal de São Carlos, Rod. Washington Luís, km 235, 13565 - 905, São Carlos, SP, Brazil pako@ufscar.br Author Melo, Bruno F. 0000-0002-0499-567X Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Carlos, Rod. Washington Luís, km 235, 13565 - 905, São Carlos, SP, Brazil & Department of Ichthyology, American Museum of Natural History, 200 Central Park West, New York, NY 10024, USA & Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Carlos, Rod. Washington Luís, km 235, 13565 - 905, São Carlos, SP, Brazil & Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Carlos, Rod. Washington Luís, km 235, 13565 - 905, São Carlos, SP, Brazil bmelo@amnh.org text Zootaxa 2024 2024-11-08 5537 2 245 258 http://dx.doi.org/10.11646/zootaxa.5537.2.5 journal article 305879 10.11646/zootaxa.5537.2.5 3b14c4c8-435f-423f-b743-10315152665d 1175-5326 14239518 28E2BC2F-1AB1-4073-818A-160FBAA69DD5

TABLE 2. Principal component analysis of Schizodon altoparanae (n=17) and S. unimaculatus (n=8). Variable loadings of ten characters for principal component axis 1 and 2. Asterisks represent main characters distinguishing the two species.

	PC 1	PC 2
Eigenvalue	0.0638	0.0014
% of variance	95.20	2.15
Standard length	0.3593	0.1408
Head length	0.2561	0.0060
Trunk length	0.3888*	0.1865
Body depth	0.3062*	0.1365
Predorsal length	0.2871	0.1219
Snout length	0.3175*	0.0296
Interorbital width	0.3392*	0.1125
Orbital diameter	0.0816	0.6737*
Caudal peduncle depth	0.3122*	-0.1454
Mandible width	0.3975*	-0.6506*