Sperm characteristics as additional evidence of close relationship between Lebiasina and Piabucina (Characiformes: Lebiasinidae: Lebiasininae)

Autor(es)

Santana, Julio Cesar de O. ^[1] ; Netto-Ferreira, Andre L. ^[2] ; Calcagnotto, Daniela ^[3] ; Quagio-Grassiotto, Irani ^[4]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas UNICAMP, Programa Posgrad Biol Celular & Estrutural, BR-13083865 Campinas, SP - Brazil

^[2] MZUSP, BR-04218970 Sao Paulo - Brazil

^[3] Univ Sao Paulo, Dept Genet & Biol Evolut, Inst Biociencias, BR-05508900 Sao Paulo - Brazil

^[4] Univ Estadual Paulista Julio de Mesquita Filho UN, Inst Biociencias, Dept Morfol, BR-18618970 Botucatu, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Neotropical Ichthyology; v. 11, n. 3, p. 573-579, JUN 30 2013.
• Citações Web of Science: 0

Resumo

Spermiogenesis and spermatozoa of representatives of the genera Lebiasina and Piabucina are described. Spermiogenesis is quite similar among all analyzed species of these genera and is identified as Type II. In this type of spermiogenesis, the flagellum of earliest spermatids lies lateral to the nucleus. A slight movement of the nucleus towards the centriolar complex is observed. In late spermatids, the nucleus slightly elongates towards the flagellum. The formation of two striated rootlets apparently occurs in early/intermediate spermatids. The spermatozoa of species of Lebiasina and Piabucina share (1) a drop-shaped slightly elongated nucleus that is laterally positioned relative to the flagellum; (2) a superolateral centriolar complex; (3) two striated rootlets; (4) a basolateral midpiece; (5) oblong mitochondria and (6) a few spherical vesicles. The spermatic characteristics of Lebiasina and Piabucina indicate that spermiogenesis is a homologous process among all species of both genera examined to date and can be considered, along with the spermatozoa morphology, additional evidence indicating a close relationship between Lebiasina and Piabucina. (AU)

• Processo FAPESP: 10/01626-2 - Análise das características ultraestruturais da espermiogênese e dos espermatozoides de representantes da superfamília Erythrinoidea (Teleostei: Characiformes): uma abordagem filogenética
• Beneficiário: Júlio César de Oliveira Santana
• Modalidade de apoio: Bolsas no Brasil - Doutorado