The monophyly of the Characidiinae, a Neotropical group of characiform fishes (Teleostei: Ostariophysi)

Buckup, Paulo Andreas

doi:10.1006/zjls.1993.1024

Cited by 75 publications

(276 citation statements)

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“…1-3). Also, in many significant past papers the genus Brycon was considered "primitive", "generalized" or phylogenetically basal in the Neotropical Characiformes, or at least in relation to the Characidae, sharing several osteological features with basal African groups (see Weitzman, 1962;Buckup, 1998;Mirande, 2009Mirande, , 2010Weitzman, 2003 andOliveira et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations

Pereira

Castro

2016

Neotrop. ichthyol.

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The brain of Brycon orbignyanus is described as a model for future studies of the gross morphology of the central nervous system in Characiformes. The study of brain gross morphology of 48 distinct taxa of Characiformes, one of Cypriniformes, two of Siluriformes and two of Gymnotiformes, allowed us to propose, for the first time, six putative brain synapomorphies for the Characiformes and also two possibly unique gross brain morphology characters for the Siluriformes. A detailed protocol for the extraction of the brain in Characiformes is also provided.O encéfalo de Brycon orbignyanus é descrito como um modelo para futuros estudos da anatomia externa do Sistema Nervoso Central de Characiformes. O estudo da morfologia externa de 48 táxons distintos de Characiformes, um de Cypriniformes, dois de Siluriformes e dois de Gymnotiformes, permitiu-nos propor, pela primeira vez, seis prováveis sinapomorfias encefálicas e também duas possíveis características encefálicas para Siluriformes. Um protocolo detalhado para a dissecção e extração do encéfalo de Characiformes é também apresentado.

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Section: Discussionmentioning

confidence: 99%

The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations

Pereira

Castro

2016

Neotrop. ichthyol.

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“…The species Characidium zebra is considered morphologically basal in the phylogeny of Characidium, presenting several plesiomorphic characters (Buckup, 1993). In that sense, the karyotype of this species could also be characterized as basal for the group under study and chromosome variations observed in the other species could be explained by the occurrence of several structural chromosome rearrangements.…”

Section: Discussionmentioning

confidence: 99%

“…The phylogenetic position of this group has recently changed, since Characidiinae was considered a member of Hemiodontidae, a subfamily of Characidae, and also an independent family. A cladistic analysis suggested that Characidiinae and Crenuchinae belong to the monophyletic family Crenuchidae (Buckup, 1998). Cytogenetic studies in this group are scarce, recent, and limited to some species of the genus Characidium (Miyazawa & Galetti Jr., 1994;Maistro et al, 1998Maistro et al, , 2004Centofante et al, 2001Centofante et al, , 2003Silva & Maistro, 2006;Vicari et al, 2008;Noleto et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Interspecific chromosomal divergences in the genus Characidium (Teleostei: Characiformes: Crenuchidae)

et al. 2010

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Karyotypes of seven fish species of the genus Characidium, three of them studied for the first time, were characterized using conventional cytogenetic techniques (Giemsa staining, Ag-NOR, and C-banding). All species presented a diploid number of 2n=50, with only metacentric and submetacentric chromosomes, as observed in all Characidium species studied. In two species cells with one to three B chromosomes were observed. All species analyzed have a single NOR-bearing chromosome pair with morphological differences among them. Characidium cf. zebra shows heterochromatic blocks restricted to the pericentromeric regions of all chromosomes denoting the absence of a sex chromosome system. On the other hand, the species Characidium lanei, C. pterostictum, C. lauroi, C. oiticicai, C. schubarti, and Characidium sp., besides presenting pericentromeric heterochromatic blocks, exhibited large interstitial and/or terminal heterochromatic blocks, and a ZZ/ZW sex chromosome system. The constitutive heterochromatin seems to play a relevant role in the chromosome differentiation process of the studied species, mainly in relation to the sex chromosomes. The geographical isolation of the rivers in which the species were sampled, associated with their way of life restricted to headwaters environments, may have favored the process of fixation of different karyotypes found in each of the analyzed species.Os cariótipos de sete espécies de peixes do gênero Characidium, três estudadas pela primeira vez, foram caracterizados com o uso das técnicas citogenéticas convencionais (Giemsa, Ag-RONs e bandamento-C). Todas as espécies apresentaram número diplóide de 2n=50 cromossomos, com predominância de cromossomos dos tipos meta e submetacêntricos. Nesse estudo foi também observada a presença de até três cromossomos B em células de duas espécies, C. oiticicai e C. pterostictum. O bandamento C e o tratamento com nitrato de prata revelaram significativas diferenças nos cariótipos das espécies analisadas. A espécie Characidium cf. zebra apresenta heterocromatina restrita às regiões pericentroméricas dos cromossomos e ausência de heteromorfismos cromossômicos relacionados à diferenciação sexual, enquanto as espécies Characidium lanei, C. pterostictum, C. lauroi, C. oiticicai, C. schubarti e Characidium sp., evidenciaram, além de blocos pericentroméricos também observados em Characidium cf. zebra, grandes blocos heterocromáticos intersticiais e/ou terminais e sistema cromossômico de diferenciação sexual do tipo ZZ-ZW. A heterocromatina constitutiva parece exercer papel relevante no processo de diferenciação cromossômica destas espécies, principalmente em relação à diferenciação de cromossomos sexuais. O isolamento geográfico dos rios em que essas espécies foram amostradas, bem como o seu modo de vida restrito às regiões de cabeceira, podem ter favorecido o processo de diferenciação cromossômica e a fixação dos cariótipos particulares encontrados em cada uma das espécies analisadas.

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“…The African citharinids have been commonly considered in both morphological and molecular analyses as basal characiforms (Vari, 1979;Ortí & Meyer, 1997;Buckup, 1998;Calcagnotto et al, 2005). The spermatic characteristics of chromatin condensation found in citharinids (Mattei et al, 1995) is similar to that found in Chanos chanos, a gonorynchiform (Gwo et al, 1995), sister group of the Otophysi, and in Olivaichthys mesembrinus, Diplomystidae (Quagio-Grassiotto et al, 2001b), the most basal family in Siluriformes, and may represent a primitive state of the character that remains in some representatives of characiforms, including serrasalmines, Salminus, Brycon, stevardiines, anostomids, prochilodontids, and cynodontids.…”

Section: Discussionmentioning

confidence: 99%

Spermiogenesis and spermatozoa ultrastructure in the Serrasalminae (Ostariophysi: Characiformes) with further evidence on the relationships of the piranhas and pacus

et al. 2009

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Spermatozoa and spermiogenesis ultrastructure were studied in the serrasalmine species Piaractus mesopotamicus, Mylossoma duriventre, Serrasalmus maculatus, and Metynnis mola and two distinct patterns may be recognized: the first common to Mylossoma, Serrasalmus and Metynnis, and the other, characteristic of Piaractus. The latter pattern is more similar to the conditions found in Salminus and Brycon. On the other hand, serrasalmine spermatozoa also share characteristics with the spermatozoa of species of the superfamily Anostomoidea. The phylogenetic significance of these characters is discussed.A ultraestrutura dos espermatozoides e espermiogênese foram estudadas nas espécies Piaractus mesopotamicus, Mylossoma duriventre, Serrasalmus maculatus e Metynnis mola de Serrasalminae, sendo dois padrões distintos reconhecidos: um comum a Mylossoma, Serrasalmus e Metynnis, e o segundo característico de Piaractus. Este último é mais similar ao observado em Salminus e Brycon. Por outro lado, o espermatozoide dos serrasalmíneos compartilha algumas características com espécies da superfamília Anostomoidea. O significado filogenético destes caracteres é discutido.

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The monophyly of the Characidiinae, a Neotropical group of characiform fishes (Teleostei: Ostariophysi)

Cited by 75 publications

References 0 publications

The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations

The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations

Interspecific chromosomal divergences in the genus Characidium (Teleostei: Characiformes: Crenuchidae)

Spermiogenesis and spermatozoa ultrastructure in the Serrasalminae (Ostariophysi: Characiformes) with further evidence on the relationships of the piranhas and pacus

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