Shell variation in sympatric freshwater Lymnaea peregra and L. ovata (Gastropoda: Lymnaeidae)
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منابع مشابه
Lymnaea cousini Jousseaume, 1887 (Gastropoda: Lymnaeidae): first record for Venezuela.
Lymnaea cousini Jousseaume, 1887 was collected in Mucubaji, Merida State, Venezuela, from a permanent pond located at a very high altitude (3760 m). Identification of the collected specimens was made by comparison with the original description of the shell by Jousseaume and the description of the renal organ and reproductive system of topotypic specimens by Paraense.
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In the article entitled “First report of Lymnaea cousini Jousseaume, 1887 naturally infected with Fasciola hepatica (Linnaeus, 1758) (Trematoda: Digenea) in Machachi, Ecuador” recently published by Angel Villavicencio A and Mauricio Carvalho de Vasconcellos in Memorias do Instituto Oswaldo Cruz (vol. 100, issue 7, pages 735-737, November 2005), it is stated that their finding in Ecuador represe...
متن کاملSynonymy between Lymnaea bogotensis Pilsbry, 1935 and Lymnaea cousini Jousseaume, 1887 (Gastropoda: Lymnaeidae).
The lymneid snail Lymnaea bogotensis Pilsbry 1935 is synonymized with L. cousini Jousseaume 1887, based on morphological comparisons of the reproductive systems. The shell, renal tube, and reproductive system are described and illustrated from specimens collected in the type locality and the municipality of Paipa, Colombia. Bibliographical records reveal L. columella to be the commonest lymneid...
متن کاملBacteria and digestive enzymes in the alimentary tract of Radix peregra (Gastropoda, Lymnaeidae)
The extracellular digestive enzymes cellobiase and chitobiase were quantitatively determined in the esophagus, stomach, and intestine of Radix peregru. Although both enzymes had comparable Michaelis constants between 16 and 32 PM liter-l, the enzyme activities were significantly higher for cellobiase (2 nanoKatals [nKat] from the whole gut tract) than for chitobiase (0.3 nKat). As became eviden...
متن کاملObservations on the Embryonic Development of Freshwater Pulmonate Snail Lymnaea Acuminata (lamarck, 1822) (gastropoda: Mollusca)
Molluscs have played important role in strengthening our knowledge of fundamental processes in developmental biology, with the common pond snail Lymnaea stagnalis contributing greatly to this body of literature for nearly a century (Gatenby, 1919; Sturtevant, 1923; Canton and Sloof, 1977). The morphological, morphometric and behavioral aspects of development of L. stagnalis have been well docum...
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ژورنال
عنوان ژورنال: Biological Journal of the Linnean Society
سال: 1997
ISSN: 0024-4066
DOI: 10.1111/j.1095-8312.1997.tb01782.x