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| Gomes,Suzete R.; Silva,Rosane S. da; Gil,Guacira M.; Thomé,José W.. |
| The population growth of Simpulopsis ovata (Sowerby, 1822) from the Centro de Pesquisas e Conservação da Natureza - Pró-Mata, São Francisco de Paula, Rio Grande do Sul, Brazil, was studied along eleven months of 1996. Two discontinuous age classes were identified. The first one, with a monthly growth rate of 1.55 mm, was reproductively mature during April and May. The second one appeared after the previous group and had a monthly growth rate of 0.44 mm. The fact that no adults from the two age classes were found together is a characteristic of a semelparous species. New insights about its shell, pallial cavity and reproductive system are given. This is the first record of S. ovata for the State of Rio Grande do Sul. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Simpulopsis; Semelparity; Anatomy; Conquiliometry; Biological cycle. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000300005 |
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| Silva,Letícia F. da; Thomé,José W.. |
| Simpulopsis promatensis e S. gomesae, duas novas espécies para São Francisco de Paula, Rio Grande do Sul, Brasil, são descritas. São apresentadas a conquiliologia, conquiliometria e morfologia das partes moles, incluindo mandíbula, rádula, sistemas reprodutor e palial. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Simpulopsis; Novas espécies; Anatomia; Morfologia; Conquiliometria. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212006000200008 |
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| Arruda,Janine O.; Barker,Gary M.; Thomé,José W.. |
| ABSTRACT Omalonyx geayi Tillier, 1980 was originally described on the basis of specimens from Kaw swamp, French Guiana. This species distinguished from other of Omalonyx d'Orbigny, 1837: (i) by hermaphrodite duct twice as long and sacculate, without radial ducts but a funnel-shaped insertion on the ovariotestis, and (ii) by longitudinal wrinkled folds on the phallus inner wall. Two recent collections - from Trinidad and Carauari (Amazonas, Brazil) included specimens with ovariotestis and hermaphrodite duct morphologies similar to that originally described for O. geayi, but with phallus morphology not consistent with identification as O. geayi. A further eight lots, from Suriname, Ecuador, Brazil (Amazonas and Alagoas States), Bolivia and Cayenne-Kourou... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Parasitic castration; Histology; Neotropical; Ovariotestis; Hermaphrodite duct. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100219 |
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