The Neotropical Fish Subfamily Cynodontinae (Teleostei: Ostariophysi: Characiformes): A Phylogenetic Study and a Revision of Cynodon and Rhaphiodon

Toledo-Piza, Mônica

doi:10.1206/0003-0082(2000)286<0001:tnfsct>2.0.co;2

Cited by 40 publications

(112 citation statements)

References 45 publications

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“…1999;TOLEDO-PIZA 2000), sendo a unica especie dentre os tres generos da subfamflia Cynodontinae -Hydrolicus Mi.iller & Troschel , 1844, Cynodon Agassiz, 1829 e Rhaphiodon Agassiz, 1829 -(LUCENA & MENEZES 1998), com ocorrencia no Pantanal Mato-grossense. E urn peixe facilmente reconhecfvel , por apresentar a peculiaridade de mover sua cabe~a para cima, num angulo de 4SO, 0 que confere-Ihe urn perfil caracterfstico (LESIUK & LINDSEY 1978). o presente trabalho tern como objetivo contribuir para a amplia~ao do conhecimento sobre a ontogenia de R. vulpinus, atraves da caracteriza~ao de seu desenvolvimento 'inicial com a descri~ao da morfologia externa e morfometria de larvas da especie.…”

unclassified

Desenvolvimento inicial de larvas de Rhaphiodon vulpinus Agassiz (Characiformes, Cynodontidae)

Sousa

Severi

2002

Rev. Bras. Zool.

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ABSTRACT. Initial development of Rhaphiodon vulpinus Agassiz larvae (Characiformes, Cynodontidae). The cynodontid fish Rhaphiodon vulpinus Agassiz, 1829, known as " peixe-cachorro", is lhe only species of the family occurring in the Pantanal of Mato Grosso. The initial development of its larvae was characterized, based on malerial collected with a 500 IJ m mesh size plankton-net, in several biotopes of the Pantanal of Barao de Melga~o, Slale of Mato Grosso, Central Brazil. The analysis was carried out with 72 larvae with slandard length (SL) between 4.7 and 13.8 mm. The morphometric measurements varied positively with standard length, and body proportions ranged 8.1-17.8% for head length (ffi.), 6.2-10.1% for body height, and 63.6-73.5%, 16.8-21.6%, and 61.8-78.2% SL, respectively for pre-dorsal, pre-pectoral and pre-anal distances. The eye diameter varied positively with HL and its proportion varied between 9.1 -22.5% HL. The body relations did not show great variation along the larval development. The morphological characterization of larvae from 4.7 to 5.8 mm SL, in the pre-flexion phase, showed the presence of an embryonic finfold covering the unrayed fins, exposed branchial arches , absence of exogenous digestive content, unpigmented eyes and round shaped head. Larvae with SL between 8. 1 and 13 .8 mm SL were in the flexion phase, presenting a pointed head, mouth filled with external and internal rows of numerous teelh, presence of exogenous food, pigmented eyes, branchial filaments still exposed, evident swimmi ng-bladder, and formation of the first caudal, dorsal and anal fins ' rays. Only individ uals in the pre-flexion and flexion phases were analyzed, and no completely developed fin was evidenced. A maximum number of 69 myomeres was counted and no evident pigmentation over the body observed. Comparing R.vulpinus larvae to those of other Characiformes, it was observed that this species and Apareiodo/l affillis Steindachner, 1879 present smaller body proportions , and variation range of body height , while R. vLlipiliLiS is characteri zed by a shorter eye diameter. The myomere number is a relevant feature for the identification of R. vuipiliLiS larvae, since it is the Characiform that possesses the highest myomere number, among those species of this family studied so far. KEY WORDS. Cynodontidae, Rlzaplziodoli vulpinus, larval development, ontogeny, morphomelrics o estudo da ecologia das fases iniciais do cicIo vital e da ontogeni a em peixes esta historicamente associ ado a biologia pesqueira e ao recrutamento de espec ies marinhas, principal mente daquelas de importancia comercial, sen do consideravel 0 volume de informa~6es sobre especies de agua salgada (BLAXTER 1984). Uma sinopse hist6rica e levantamento bibliografico podem ser encontrados em MOSER et at.

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unclassified

Desenvolvimento inicial de larvas de Rhaphiodon vulpinus Agassiz (Characiformes, Cynodontidae)

Sousa

Severi

2002

Rev. Bras. Zool.

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“…Mesopterygoid teeth were reported, among the Characiformes, in Hoplerythrinus unitaeniatus (Spix, Agassiz) (Weitzman, 1964), Boulengerella Eigenmann (Vari, 1995), Crenuchus Günther and Ammocryptocharax vintonae (Eigenmann) (Buckup, 1993), Acestrorhynchus Eigenmann, Kennedy and Cynodontinae (Lucena, Menezes, 1998;Toledo-Piza, 2000), and Roeboides dispar (Lucena, 2001). Mesopterygoid teeth can present interspecific and/or ontogenetic variation, being present in some individuals and absent in others within the same species (Toledo-Piza, 2000).…”

Section: Discussionmentioning

confidence: 99%

“…Mesopterygoid teeth can present interspecific and/or ontogenetic variation, being present in some individuals and absent in others within the same species (Toledo-Piza, 2000). In Odontostilbe, this character is known only in O. avanhandava and O. weitzmani.…”

Section: Discussionmentioning

confidence: 99%

“…The subfamily includes 18 genera and 66 valid species, of which almost half (8) of the genera and almost one third (19) of the species were described in the last twenty years (Malabarba, 1998(Malabarba, , 2003Malabarba, Bertaco, 1999;, 2000Malabarba et al, 2004;Bührnheim, Malabarba, 2006Bührnheim et al, 2008;Malabarba, Jerep, 2012Zarske, 2012;Vari et al, 2016;Jerep et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Two new species of Odontostilbe historically hidden under O. microcephala (Characiformes: Cheirodontinae)

2018

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Specimens historically identified as Odontostilbe microcephala from the upper rio Paraná and Andean piedmont tributaries of the río Paraguay are reviewed and split in three species. We found that the distribution of O. microcephala is restricted to the Andean slope of the río Paraguay basin. The species is distinguished from congeners with subterminal mouth by the elongate body, usually 10-12 gill rakers on upper branch and smaller horizontal orbital diameter (24.6-32.8 % HL, mean 28.7%). Specimens from upper rio Paraná constitute two new species, diagnosed from other Cheirodontinae by the presence of mesopterygoid teeth, grouped on median portion and forming a continuous row. The new species are distinguished from each other by having premaxillary teeth with five cusps vs. nine cusps and by the number of lamellae in left and right sides of central median raphe of olfactory rosette with 20-21 vs. 11-12.Keywords: Biodiversity, Characidae, La Plata River basin, Mesopterygoid teeth, Taxonomy.Espécimes historicamente identificados com Odontostilbe microcephala do rio Paraná e tributários do río Paraguay, foram revisados e separados em três espécies. A distribuição de O. microcephala é restrita ao sopé andino da bacia do río Paraguay. A espécie é distinta das congêneres com boca subterminal pela forma alongada, geralmente 10-12 rastros branquiais no ramo superior e menor diâmetro horizontal da órbita (24,6-32,8 % CC, média 28,7%). Espécimes do alto rio Paraná constituem duas espécies novas diagnosticadas de outros Cheirodontinae pela presença de dentes no mesopterigoide, agrupados em sua porção média e formando uma fileira continua. As novas espécies distinguem-se por ter dentes premaxilares com cinco cúspides vs. nove cúspides e pelo número de lamelas nos lados esquerdo e direito da rafe central da roseta olfativa com 20-21 vs. 11-12.Palavras-chave: Bacia do rio da Prata, Biodiversidade, Characidae, Dentes do Mesopterigoide, Taxonomia.

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“…O real status taxonômico dos dois grupos componentes do presente clado é discutido por diversos autores (Buckup, 1998;Toledo-Piza, 2000;Mirande, 2009. A presente análise remonta à relação de grupo-irmão baseada em quatro sinapomorfias não exclusivas e mais três caracteres de interpretação ambígua, discutida e apresentada por Lucena & Menezes (1998: 262-264 …”

Section: Clado 61 (Cynodontidae + Acestrorhynchidae)unclassified

Anatomia encefálica comparada de Characiformes (Teleostei: Ostariophysi)

Pereira¹

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Acestrorhynchidae como clado-irmão de Erythrinoidea; Gasteropelecidae + Triportheidae + Bryconidae sendo mais relacionados entre si; Crenuchidae como grupo-irmão de Characidae. Além dessas relações, corroborramos a elevação de algumas subfamílias de Characidae para o status de família, como Acestrorhynchidae, Bryconidae, Cynodontidae, Iguanodectidae e Triportheidae. A família Characidae tendo Heterocharacinae como ramo basal e sustentada principalmente por caracteres osteológicos tendo adicionalmente, um caráter exclusivo encefálico. Aphyoditeinae + Aphyocharacinae + Cheirodontinae mais relacionados e a subfamília Characinae como um grupo monofilético.Palavras-chave: Peixes de Água Doce; Sistema Nervoso Central; Filogenia. 9 AbstractCharaciformes comprises about 1.700 formally described species inhabiting the Neotropical region and three exclusives families of sub-Saharan Etiopic. The species of the order have herbivorous, carnivorous and detritivores feeding habits, being an order of several ecological habits. The formal classification of the families of the order is based almost exclusively on osteological characters and very few of characters of other types are used to establish phylogenetic hypotheses in the group. Thus, the present study of brain morphological complex aims to fill this gap represented by the absence of new morphological characters of another nature that might contribute to a better understanding of the relationships among the Characiformes. Thus, the present study had as main objectives the description and Algumas pessoas destacam-se na ajuda e discussão desse trabalho e não poderiam deixar de ser agradecidos, André Esguícero, pelas discussões sobre as relações de Characidae, em especial das subfamílias Aphyoditeinae, Aphyocharacinae e Stervadiinae; Osmar Santos, pelas discussões sobre os representantes lepidófagos incluídos nesse estudo, sempre com muita calma e conhecimento sobre a evolução desse grupo tão intrigante; Murilo Pastana, pelas trocas de ideias sobre as complexas relações filogenéticas entre as famílias de Characiformes; Patrício H. Bové pelas ideias e discussões sobre ecologia e; por último, contudo, não menos importantes, Vanessa N. Roma, que apesar de não "entender" anatomia de peixes, sempre esteve de ouvidos abertos e disposta a escutar minhas inúmeras dúvidas sobre como compor ou não esse trabalho e D. Claudia Moço, sempre com sua bondade e carinho para distribuir nas horas de procrastinação lirpiana.

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The Neotropical Fish Subfamily Cynodontinae (Teleostei: Ostariophysi: Characiformes): A Phylogenetic Study and a Revision of Cynodon and Rhaphiodon

Cited by 40 publications

References 45 publications

Desenvolvimento inicial de larvas de Rhaphiodon vulpinus Agassiz (Characiformes, Cynodontidae)

Desenvolvimento inicial de larvas de Rhaphiodon vulpinus Agassiz (Characiformes, Cynodontidae)

Two new species of Odontostilbe historically hidden under O. microcephala (Characiformes: Cheirodontinae)

Anatomia encefálica comparada de Characiformes (Teleostei: Ostariophysi)

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