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Phylogenetic relationships among Brazilian Biomphalaria species (Mollusca: Planorbidae) based upon analysis of ribosomal ITS2 sequences

Published online by Cambridge University Press:  27 April 2001

T.H.D.A. VIDIGAL ,
J.C. KISSINGER ,
R.L. CALDEIRA ,
E.C.R. PIRES ,
E. MONTEIRO ,
A.J.G. SIMPSON  and
O.S. CARVALHO
T.H.D.A. VIDIGAL
Affiliation:
Centro de Pesquisas René Rachou–Fiocruz, Belo Horizonte, MG–Brasil Instituto de Ciências Biológicas–Universidade Federal de Minas Gerais, Belo Horizonte, MG–Brasil
J.C. KISSINGER
Affiliation:
Centro de Pesquisas René Rachou–Fiocruz, Belo Horizonte, MG–Brasil University of Pennsylvania, Department of Biology, Philadelphia, PA, USA
R.L. CALDEIRA
Affiliation:
Centro de Pesquisas René Rachou–Fiocruz, Belo Horizonte, MG–Brasil
E.C.R. PIRES
Affiliation:
Laboratório de Genética do Câncer, Instituto Ludwig de Pesquisa sobre o Câncer, São Paulo, SP–Brasil
E. MONTEIRO
Affiliation:
Laboratório de Genética do Câncer, Instituto Ludwig de Pesquisa sobre o Câncer, São Paulo, SP–Brasil
A.J.G. SIMPSON
Affiliation:
Laboratório de Genética do Câncer, Instituto Ludwig de Pesquisa sobre o Câncer, São Paulo, SP–Brasil
O.S. CARVALHO
Affiliation:
Centro de Pesquisas René Rachou–Fiocruz, Belo Horizonte, MG–Brasil
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Abstract

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In spite of their abundance, widespread distribution and medical importance, the phylogenetic relationships among Biomphalaria snails have received relatively little attention. We have collected and studied 29 populations of snails obtained from different localities from Brazil. We have sequenced the ribosomal DNA second internal transcribed spacer (ITS2) from the following Biomphalaria species: B. glabrata, B. tenagophila tenagophila, B. occidentalis, B. straminea, B. peregrina, B. kuhniana, B. schrammi, B. amazonica, B. oligoza, B. intermedia and an outgroup species Helisoma duryi. The sequence from each species is unique. Three different methods of phylogenetic reconstruction were used (distance, maximum parsimony and maximum likelihood). The resulting phylogenetic trees obtained by these methods basically support current systematic relationships based on morphological characters alone. This study demonstrates that the ITS2 region contains markers useful for identification and determination of relationships among Biomphalaria species.

Keywords

BiomphalariaHelisomasnailDNArinternal transcribed spacer 2 (ITS2)phylogeny
Type
Research Article
Information
Parasitology , Volume 121 , Issue 6 , December 2000 , pp. 611 - 620
Copyright
2000 Cambridge University Press