Development of the splanchnocranium in Prochilodus argenteus (Teleostei: Characiformes) with a discussion of the basal developmental patterns in the Otophysi

Autor(es)

Carvalho, Murilo ^[1] ; Vari, Richard P. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Biol, Lab Ictiol Ribeirao Preto LIRP, PPG Biol Comparada, BR-14040901 Sao Paulo - Brazil

^[2] Smithsonian Inst, Natl Museum Nat Hist, Dept Vertebrate Zool, Washington, DC 20013 - USA

• Tipo de documento: Artigo Científico
• Fonte: ZOOLOGY; v. 118, n. 1, p. 34-50, FEB 2015.
• Citações Web of Science: 3

Resumo

Development of the mandibular, hyoid and gill arches, which constitute the splanchnocranium, are described for Prochilodus argenteus, order Characiformes, one of the basal lineages of the Otophysi. Development was examined from just hatched larvae through juveniles using whole specimens cleared and counterstained for cartilage and bone as well as histological preparations. Observations are compared with the developmental trends reported for Cypriniformes, the basalmost clade of the Otophysi. Shortened developmental sequences for Prochilodus compared to the cypriniform Catostomus were discovered in the ontogeny of the ceratohyals, ceratobranchials 1-5, epibranchials 1-4 and the symplectic portion of the hyosymplectic. Prochilodus also differs from Catostomus in having the basihyal plus the anterior copula appearing at different stages of ontogeny rather than simultaneously. Contrary to previous assumptions, developmental information indicates that hypobranchial 4 as well as likely basibranchial 5 are present in Prochilodus. Various developmental patterns in Prochilodus considered basal for the Otophysi, the predominant component of the Ostariophysi, are likely conserved from patterns prevalent in basal groups in the Actinopterygii. (C) 2014 Elsevier GmbH. All rights reserved. (AU)

• Processo FAPESP: 12/05152-0 - Evolução molecular de regiões regulatórias de genes HOX associados com a morfologia da nadadeira de peixes, com especial ênfase em Chondrichthyes
• Beneficiário: Murilo de Carvalho
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado