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Acuña-Mesén, R. A. (1987). Comparación de la ultraestructura de la cáscara del huevo de la tortuga rhinoclemmys pulcherrima con la de los huevos de otros reptiles. a comparison of ultrastructure of the egg shell of the turtle rhinoclemmys pulcherrima with that of eggs of other re. Revista de Biologia Tropical, 35(1), 41–48. 
Added by: Admin (13 Sep 2009 10:11:04 UTC)
Resource type: Journal Article
BibTeX citation key: AcuaMesn1987
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Categories: General
Keywords: Chelonia, Chelonia mydas, Cheloniidae, Geoemydidae, Lepidochelys, Lepidochelys olivacea, Rhinoclemmys, Rhinoclemmys pulcherrima, Schildkröten = turtles + tortoises, Zeitigung = incubation
Creators: Acuña-Mesén
Collection: Revista de Biologia Tropical
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Abstract     
The egg shell of the red turtle, Rhinoclemmys pulcherrima is composed of an external cuticle, a middle calcareous layer and the internal membrane. The cuticle is not sculptured as in those of the kinosternidae. The radial view is similar in eggs of Geochelone elephantopus. The cuticle of R pulcherrima shows superficial fractures or crevices whose complementary edges are similar to a jigsaw puzzle. The calcareous layer is formed by structural units composed by groups of needle-like aragonite crystals. In the crocodilian egg, the shell shows calcite deposited in plates instead of aragonite. The calcareous units are interlocked, a situation that is not present in the shell of marine turtle eggs (Lepidochelys olivacea and Chelonia mydas). The inner extremes of the calcareous units are surrounded by a palisade of needle-like aragonite crystals. This type of structure is not observed in other reptilian eggshells
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