Biological aspects of Omalonyx convexus (Mollusca, Gastropoda, Succineidae) from the Rio Grande do Sul State, Brazil


  • Janine Oliveira Arruda
  • José Willibaldo Thomé Escritório de Malacologia e de Biofilosofia



Omalonyx convexus (Heynemann, 1868) is widely spread throughout the Rio Grande do Sul State, Brazil. The studied specimens presented in vivo, tegument and mantle coloring in variations between milky-white, orange and beige. The shell presented itself covered by the mantle in different extents; however, it was not completely covered on any of the specimens. The feeding diet is basically constituted by vegetal tissues, although non-vegetal food items were also found. The specimens were found in preserved and in polluted fresh water environments, as well as on natural and artificial substrates. The temperature throughout the day influences their placement on habitat substrates.

Biografia do Autor

José Willibaldo Thomé, Escritório de Malacologia e de Biofilosofia

Possui Graduação de Bacharel em História Natural pela Pontifícia Universidade Católica do Rio Grande do Sul-PUCRS, Graduação de Licenciado em História Natural pela PUCRS e Doutorado em História Natural e Livre-Docência em Zoologia pela PUCRS.

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