A new species of <i>Roeboides</i> (Teleostei: Characidae) from Costa Rica and Panama, with a key to the middle American species of the genus

Matamoros, Wilfredo A.; Chakrabarty, Prosanta; Angulo, Arturo; Garita-Alvarado, Carlos A.; McMahan, Caleb D.

doi:10.1590/S1679-62252013000200006

Brazil

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Original Articles • Neotrop. ichthyol. 11 (2) • June 2013 • https://doi.org/10.1590/S1679-62252013000200006 linkcopy

A new species of Roeboides (Teleostei: Characidae) from Costa Rica and Panama, with a key to the middle American species of the genus

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Abstracts

A new species of Roeboides is described from the Pacific slope of Costa Rica and Panama. Roeboides bussingi differs from all other Central American Roeboides and all members of the R. guatemalensis species group by the following combination of characters: presence of 18-22 scales above the lateral line (vs. 12-16 in R. dientito); 15-22 scales below the lateral line (vs. 10-14 in R. dientito, and 20-24 in R. loftini); an inconspicuous, sometimes absent, crescent-shaped humeral spot (vs. a large round, conspicuous humeral spot in R. carti, R. dayi, R. dientonito, R. ilseae, R. loftini, and R. occidentalis); a small wedge-shaped spot that does not reach the lateral line (vs. a large spot crossing the lateral line in R. guatemalensis); a teardrop shaped caudal spot (vs. caudal spot triangle shaped in R. bouchellei); and a dark band at the distal tip of the anal fin (vs. dark band absent in R. bouchellei). A key to all Middle American species of Roeboides is also presented

Central America; Characinae; Distribution; Freshwater; Pacific Slope

Morphometrics	H	Mean	Range	SD
Standard length	74.9	59.2	44.2-79.5	9.5
Head length	26.9	15.9.9	11.7-21.3	2.1
Percentages of standard length
Greatest body depth	35.3	34.9	32.3-37.5	1.6
Caudal peduncle depth	9.4	8.7	7.7-9.4	0.5
Caudal peduncle length	7.2	8.3	6.5-9.9	1.1
Predorsal length	51.3	48.1	44.0-51.3	1.7
Preanal length	45.4	45.6	42.0-48.8	2.2
Prepectoral length	23.4	26.5	23.3-45.1	5.5
Prepelvic length	30.9	31.4	21.9-35.4	4.1
Height of dorsal fin	27.6	26.5	20.7-30.5	2.6
Height of anal fin	14.6	15.6	12.7-19.5	2.1
Pectoral-fin length	19.6	20.4	17.1-24.8	2.3
Pelvic-fin length	18.7	18.1	11.5-20.7	2.7
Percentages of head length
Orbit diameter	31.3	32.2	28-36	2.5
Snout length	23.6	25.3	20-51	5.5
Maxillary length	53.2	45.2	23-53	5.5
Bony interorbital length	24.1	27.0	21-31	2.4
Meristics	H	Mean	Range	Mode
Anal-fin rays	45 iv	44.0 iv	42-45 iv	45 iv
Pectoral-fin rays	13	13.0	13-14	13
Pelvic-fin rays	7	7.0	7	7
Dorsal-fin rays	9 ii	9 ii	9 ii	9 ii
Lateral line scales	83	80.3	72-85	81
Scales above lateral line	20	19.8	18-22	20
Scales below lateral line	21	20.0	15-22	20
Scales around caudal peduncle	24	24.7	22-27	24

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Sociedade Brasileira de Ictiologia Neotropical Ichthyology, Departamento de Biologia Animal e Vegetal, CCB, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid, Km 380, Cidade Universitária, 86055-900, Londrina, Paraná, Brazil, Phone +55(43)3371-5151 - Londrina - PR - Brazil
E-mail: neoichth@nupelia.uem.br

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