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Aspectos morfológicos e de incubação em três espécies de Corbicula Mühlfeld, no lago Guaíba, Rio Grande do Sul, Brasil (Bivalvia, Corbiculidae) / Morphological aspects and incubation in three species of Corbicula Mühlfeld, in Guaíba Lake, Rio Grande do Sul, Brazil (Bivalvia, Corbiculidae)
Martins, Demetrius da Silva; Veitenheimer-Mendes, Inga Ludmila; Faccioni-Heuser, Maria Cristina.
  • Martins, Demetrius da Silva; UFRGS. Instituto de Biociências. Laboratório de Malacologia. Porto Alegre. BR
  • Veitenheimer-Mendes, Inga Ludmila; UFRGS. Instituto de Biociências. Laboratório de Malacologia. BR
  • Faccioni-Heuser, Maria Cristina; UFRGS. Centro de Microscopia Eletrônica. Porto Alegre. BR
Biota neotrop. (Online, Ed. port.) ; 6(2): 0-0, 2006. ilus, tab
Article in Portuguese | LILACS | ID: lil-447604
RESUMO
Três espécies de Corbicula registradas para o lago Guaíba são comparadas quanto à morfologia externa das partes moles e aspectos relativos à incubação branquial. Observam-se diferenças específicas nos sifões e quanto à incubação branquial espécimes de C. largillierti apresentam incubação somente nas demibrânquias internas; registra-se pela primeira vez espécimes de C. fluminea com incubação nas demibrânquias externas; e espécimes de C. af. fluminalis apresentam incubação predominantemente tetragenous (i. e. em ambas demibrânquias).
ABSTRACT
Three species of Corbicula identified in Guaíba Lake are compared in respect to the external morphology of their soft parts and aspects of branchial incubation. Morphological differences are most obvious in the siphons. For the first time, individuals of C. fluminea have been found with incubation occurring in the outer as well as the inner demibranchs. Individuals of C. largillierti showed incubation only in the inner demibranchs. In specimens identified as C. aff. fluminalis, tetrabranchial incubation predominated.
Subject(s)
Full text: Available Index: LILACS (Americas) Main subject: Aquatic Fauna / Aquatic Flora Country/Region as subject: South America / Brazil Language: Portuguese Journal: Biota neotrop. (Online, Ed. port.) Journal subject: Tropical Medicine / Environmental Health Year: 2006 Type: Article Affiliation country: Brazil Institution/Affiliation country: UFRGS/BR

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Full text: Available Index: LILACS (Americas) Main subject: Aquatic Fauna / Aquatic Flora Country/Region as subject: South America / Brazil Language: Portuguese Journal: Biota neotrop. (Online, Ed. port.) Journal subject: Tropical Medicine / Environmental Health Year: 2006 Type: Article Affiliation country: Brazil Institution/Affiliation country: UFRGS/BR