Redescription of ‘ Chasmocranus’ brachynema (Heptapteridae: Heptapterini) Author Deprá, Gabriel de Carvalho Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Av. Colombo, 5790, 87020 - 900 Maringá, PR, Brazil. (GCD) gabrieldepra @ gmail. com. gabrieldepra@gmail.com Author Slobodian, Veronica Universidade de Brasília, Instituto de Ciências Biológicas, Departamento de Zoologia, Laboratório de Ictiologia Sistemática, Campus Universitário Darcy Ribeiro, Asa Norte, 70910 - 900 Brasília, DF, Brazil. (VS) vslobodian @ unb. br. & Universidade de Brasília, Programa de Pós-Graduação em Zoologia, Campus Universitário Darcy Ribeiro, Asa Norte, 70910 - 900 Brasília, DF, Brazil. vslobodian@unb.br text Neotropical Ichthyology 2024 e 230091 2024-02-23 22 1 1 20 http://dx.doi.org/10.1590/1982-0224-2023-0091 journal article 295853 10.1590/1982-0224-2023-0091 2ffe33e1-26ac-44e2-b271-2d92a03a1897 1982-0224 11163282

TABLE 1 | Morfometric data of ‘ Chasmocranus ’ brachynema. *Approximate value. SD = Standard deviation.

	Holotype (EEBP 617)	EEBP 629	NUP 22699	MZUSP 22511	Mean	SD
Total length	152*	90*	115.3	–	–	–
Standard length	128.3	74.9	93.0	42.2–50.1
Percentages of standard length
Body depth at dorsal-fin origin	12.2	14.0	11.3	9.4–10.9	11.6	1.7
Body depth at adipose-fin origin	12.5	12.4	13.0	11.4–11.4	12.1	0.7
Caudal-fin depth	–	11.2	16.2	–	13.7	3.6
Body width at dorsal-fin origin	14.0	12.7	13.9	11.8–12.6	13.0	0.9
Cleithral width	18.1	17.8	17.1	17.0–18.0	17.6	0.5
Head length to base of supra-occipital process	22.0	22.4	23.1	22.2–24.4	22.8	1.0
Lateral head length (to posteriormost point of opercle)	25.1	25.2	25.5	25.3–27.0	25.6	0.8
Maxillary-barbel length	23.7	23.2	23.5	22.0–26.3	23.7	1.6
Outer mental-barbel length	10.0	12.0	13.0	10.6–12.3	11.6	1.3
Inner mental-barbel length	7.0	7.9	9.0	8.6–9.5	8.4	1.0
Predorsal length	42.5	43.4	41.3	42.5	42.4	0.9
Distance between snout tip and terminus of dorsal-fin base	54.2	55.9	53.1	54.5–56.4	54.8	1.3
Distance between snout tip and dorsal-fin distal end, adpressed	63.0	65.3	64.5	64.7–65.3	64.5	0.9
Dorsal fin to adipose fin	14.3	13.5	14.4	14.7–15.4	14.5	0.7
Dorsal-fin base	12.5	13.0	12.0	11.8–12.6	12.4	0.4
Length of first dorsal-fin ray (unbranched)	12.9	15.0	14.7	11.6–15.8	14.0	1.7
Length of stiffened part of first dorsal-fin ray	7.3	6.8	7.4	8.1–9.0	7.7	0.8
Length of second dorsal-fin ray (first branched)	14.1	16.3	16.8	15.6	15.7	1.2
Length of third dorsal-fin ray (second branched)	13.3	17.4	16.6	15.8	15.8	1.7
Length of last dorsal-fin ray	9.0	9.7	10.8	10.6	10.0	0.8
Prepectoral length	26.6	24.6	23.9	25.3–28.0	25.7	1.6
Distance between snout tip and terminus of pectoral-fin base	30.2	28.0	28.0	28.9–31.3	29.3	1.4
Distance between snout tip and pectoral-fin distal end, adpressed	40.2	–	–	–	–	–
Length of first pectoral-fin ray (unbranched)	10.2	13.4	12.7	13.4–15.6	13.1	1.9
Length of stiffened part of first pectoral-fin ray	5.0	7.1	6.7	6.6–7.3	6.5	0.9
Length of second pectoral-fin ray (first branched)	12.1	13.6	13.5	14.2–15.4	13.8	1.2
Length of third pectoral-fin ray (second branched)	11.7	13.8	14.9	14.8	13.8	1.5
Pectoral to pelvic-fin distance	18.1	21.8	22.8	17.5–21.0	20.2	2.3
Prepelvic length	47.8	45.4	44.7	45.3–47.2	46.1	1.3
Distance between snout tip and terminus of pelvic-fin base	51.0	48.6	–	48.1–52.1	50.0	1.9
Distance between snout tip and pelvic-fin distal end, adpressed	63.1	60.7	62.2	62.3–65.9	62.8	1.9
Distance between pelvic fins	7.8	7.7	7.3	6.2–6.2	7.0	0.8
Length of first pelvic-fin ray (unbranched)	9.8	10.1	12.3	12.6–13.3	11.6	1.5
Length of second pelvic-fin ray (first branched)	11.7	13.4	14.9	14.5–15.0	13.9	1.4
Length of third pelvic-fin ray (second branched)	12.2	14.6	14.8	15.8–15.9	14.6	1.5
Pelvic to anal-fin distance	27.8	26.7	28.0	24.9–28.9	27.3	1.5
Anal-fin base	9.7	10.8	12.6	9.8–10.9	10.7	1.2
Preanal length	74.5	71.4	70.3	72.5–75.4	72.8	2.1