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Modelling intraspecific resting egg shape variation in a freshwater fairy shrimp Tanymastix stagnalis (L., 1758) (Crustacea, Branchiopoda) |
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| Authors: | ALAIN THIÉRY NICOLAS RABET GABRIEL NÈVE |
| Institution: | ER Biodiversité&Environnement, Laboratoire de Biologie Animale, Case 18, Universitéde Provence, 3 Place Victor Hugo, 13331 Marseille Cedex 3, France; Laboratoire de Biologie du Développement, UniversitéParis 7, 7 Quai St Bernard, 75005, Paris, France; EA Evolution Génome Environnement, Case 36, Universitéde Provence, 3 Place Victor Hugo, 13331 Marseille Cedex 3, France |
| Abstract: | The shape of the resting eggs of a large branchiopod crustacean, the Anostraca Tanymastix stagnalis , is represented very accurately by analytical expressions. The occurrence of atypical shape of some T. stagnalis eggs may be viewed as a simple change of the analytical expression describing the usual egg shape. Their unusual shape may be explained by a higher embryo volume within an envelope of a given size. Biological implications are briefly discussed and hypothesized in an evolutionary point of view. © 2007 The Linnean Society of London, Biological Journal of the Linnean Society , 2007, 90 , 55–60. |
| Keywords: | Anostraca cyst volume shape model |