Browsing by Subject "Helisoma duryi"
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A Bird s Eye Survey of Central American Planorbid Molluscs
| Date Issued: 2003In the course of two trips to Central America (June 1967 and July-August 1976) I had the opportunity of collecting topotypic specimens of Planorbis nicaraguanus Morelet, 1849, anatomically defined in this paper, and of P. ... -
Planorbidae, Lymnaeidae and Physidae of Peru (Mollusca: Basommatophora)
| Date Issued: 2003 -
Self-fertilization in the freshwater snails Helisoma Duryi and Helisoma Trivolvis
| Date Issued: 1988Cinquenta espéciems de cinco cepas (10 de cada cepa) de helisoma duryi de Lima (Peru), St. Croix (Ilhas Virgens), Formosa (Brasil), Cartago (Costa Rica) e St. Vicent (Pequenas Antilhas), criados isoladamente durante cerca ...