A new Scleromystax species (Siluriformes: Callichthyidae) from coastal rivers of southern Brazil

Detalhes bibliográficos
Autor(a) principal: Britto,Marcelo R.
Data de Publicação: 2005
Outros Autores: Reis,Roberto E.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Neotropical ichthyology (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000400005
Resumo: The recently resurrected callichthyid catfish genus Scleromystax includes species occurring in several Brazilian coastal river basins from southern Bahia to southern Santa Catarina. Several character states, especially those related to sexual dimorphism, demonstrate the monophyly of Scleromystax. Examination of Scleromystax specimens sampled from streams in the Ilha de Santa Catarina and Nova Veneza, and the rio Mampituba basin, Santa Catarina and Rio Grande do Sul States, revealed that they constitute a new taxon, and thus the southernmost record for the genus. Scleromystax salmacis, new species, has coloration similar to that of S. macropterus, differing from that species mainly by the absence of a black spot on the base of the median caudal-fin rays, and transverse blotches along the body more irregular than those in S. macropterus. In addition to differences in coloration and external and osteological characters, the new species differs from S. barbatus and S. prionotos by its more rounded snout. The new taxon is also distinguished from its congeners by the presence of a single perforated dorsolateral body plate, similar to the condition found in some Aspidoras species, orientation of the ventral keel of the scapulocoracoid, and by the absence of sexually dimorphic features.
id SBI-1_676561fcd12dc125381da6600d00764a
oai_identifier_str oai:scielo:S1679-62252005000400005
network_acronym_str SBI-1
network_name_str Neotropical ichthyology (Online)
repository_id_str
spelling A new Scleromystax species (Siluriformes: Callichthyidae) from coastal rivers of southern BrazilTaxonomySystematicsCorydoradinaeCatfishThe recently resurrected callichthyid catfish genus Scleromystax includes species occurring in several Brazilian coastal river basins from southern Bahia to southern Santa Catarina. Several character states, especially those related to sexual dimorphism, demonstrate the monophyly of Scleromystax. Examination of Scleromystax specimens sampled from streams in the Ilha de Santa Catarina and Nova Veneza, and the rio Mampituba basin, Santa Catarina and Rio Grande do Sul States, revealed that they constitute a new taxon, and thus the southernmost record for the genus. Scleromystax salmacis, new species, has coloration similar to that of S. macropterus, differing from that species mainly by the absence of a black spot on the base of the median caudal-fin rays, and transverse blotches along the body more irregular than those in S. macropterus. In addition to differences in coloration and external and osteological characters, the new species differs from S. barbatus and S. prionotos by its more rounded snout. The new taxon is also distinguished from its congeners by the presence of a single perforated dorsolateral body plate, similar to the condition found in some Aspidoras species, orientation of the ventral keel of the scapulocoracoid, and by the absence of sexually dimorphic features.Sociedade Brasileira de Ictiologia2005-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000400005Neotropical Ichthyology v.3 n.4 2005reponame:Neotropical ichthyology (Online)instname:Sociedade Brasileira de Ictiologia (SBI)instacron:SBI10.1590/S1679-62252005000400005info:eu-repo/semantics/openAccessBritto,Marcelo R.Reis,Roberto E.eng2007-12-14T00:00:00Zoai:scielo:S1679-62252005000400005Revistahttp://www.ufrgs.br/ni/https://old.scielo.br/oai/scielo-oai.php||neoichth@nupelia.uem.br1982-02241679-6225opendoar:2007-12-14T00:00Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI)false
dc.title.none.fl_str_mv A new Scleromystax species (Siluriformes: Callichthyidae) from coastal rivers of southern Brazil
title A new Scleromystax species (Siluriformes: Callichthyidae) from coastal rivers of southern Brazil
spellingShingle A new Scleromystax species (Siluriformes: Callichthyidae) from coastal rivers of southern Brazil
Britto,Marcelo R.
Taxonomy
Systematics
Corydoradinae
Catfish
title_short A new Scleromystax species (Siluriformes: Callichthyidae) from coastal rivers of southern Brazil
title_full A new Scleromystax species (Siluriformes: Callichthyidae) from coastal rivers of southern Brazil
title_fullStr A new Scleromystax species (Siluriformes: Callichthyidae) from coastal rivers of southern Brazil
title_full_unstemmed A new Scleromystax species (Siluriformes: Callichthyidae) from coastal rivers of southern Brazil
title_sort A new Scleromystax species (Siluriformes: Callichthyidae) from coastal rivers of southern Brazil
author Britto,Marcelo R.
author_facet Britto,Marcelo R.
Reis,Roberto E.
author_role author
author2 Reis,Roberto E.
author2_role author
dc.contributor.author.fl_str_mv Britto,Marcelo R.
Reis,Roberto E.
dc.subject.por.fl_str_mv Taxonomy
Systematics
Corydoradinae
Catfish
topic Taxonomy
Systematics
Corydoradinae
Catfish
description The recently resurrected callichthyid catfish genus Scleromystax includes species occurring in several Brazilian coastal river basins from southern Bahia to southern Santa Catarina. Several character states, especially those related to sexual dimorphism, demonstrate the monophyly of Scleromystax. Examination of Scleromystax specimens sampled from streams in the Ilha de Santa Catarina and Nova Veneza, and the rio Mampituba basin, Santa Catarina and Rio Grande do Sul States, revealed that they constitute a new taxon, and thus the southernmost record for the genus. Scleromystax salmacis, new species, has coloration similar to that of S. macropterus, differing from that species mainly by the absence of a black spot on the base of the median caudal-fin rays, and transverse blotches along the body more irregular than those in S. macropterus. In addition to differences in coloration and external and osteological characters, the new species differs from S. barbatus and S. prionotos by its more rounded snout. The new taxon is also distinguished from its congeners by the presence of a single perforated dorsolateral body plate, similar to the condition found in some Aspidoras species, orientation of the ventral keel of the scapulocoracoid, and by the absence of sexually dimorphic features.
publishDate 2005
dc.date.none.fl_str_mv 2005-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000400005
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000400005
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1679-62252005000400005
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Ictiologia
publisher.none.fl_str_mv Sociedade Brasileira de Ictiologia
dc.source.none.fl_str_mv Neotropical Ichthyology v.3 n.4 2005
reponame:Neotropical ichthyology (Online)
instname:Sociedade Brasileira de Ictiologia (SBI)
instacron:SBI
instname_str Sociedade Brasileira de Ictiologia (SBI)
instacron_str SBI
institution SBI
reponame_str Neotropical ichthyology (Online)
collection Neotropical ichthyology (Online)
repository.name.fl_str_mv Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI)
repository.mail.fl_str_mv ||neoichth@nupelia.uem.br
_version_ 1752122177875869696