Morphological variation in the allantoplacenta within the genus Mabuya (squamata: Scincidae)

The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology
Francisca Leal, Martha Patricia Ramírez-Pinilla

Abstract

The type IV allantoplacenta has been described for the New World tropical scincids lizards of the genus Mabuya; it possesses the greatest morphological complexity known among viviparous squamates. Although a common morphological pattern has been observed in the few species of this lineage in which the allantoplacental morphology has been studied, some morphological variations may be present among species and populations. Here, we report morphological variation of the allantoplacenta of twelve populations of the genus Mabuya distributed in different geographical areas in northern South America using light microscopy. It is found that all the populations/species conserve a general arrangement of the placental structures. In the embryonic hemisphere there are a placentome, paraplacentome, and chorionic areolas; these structures are related to histotrophic nutrition. At the abembryonic hemisphere, there are absorptive plaques for histotrophic transfer and respiratory segments for gas exchange. However, in some populations some distinctive features in the placentome were found. The presence in the uterine syncytium of non syncytialized columnar cell groups, and invasive cells and apical projections of the chorionic cells directed to...Continue Reading

References

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Sep 2, 2003·Journal of Experimental Zoology. Part A, Comparative Experimental Biology·Alexander F Flemming, Daniel G Blackburn
Oct 1, 2003·Journal of Morphology·Adriana Jerez, Martha Patricia Ramírez-Pinilla
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Oct 25, 2007·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Simón VieiraMartha Patricia Ramírez-Pinilla

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Citations

Oct 5, 2010·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Martha Patricia Ramírez-PinillaElena Stashenko
May 15, 2015·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Daniel G Blackburn
May 1, 2015·Biological Reviews of the Cambridge Philosophical Society·Andrew N OstrovskyAlexander V Ereskovsky
Jun 4, 2015·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Daniel G Blackburn
Apr 12, 2017·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Nathaly Hernández-DíazMartha Patricia Ramírez-Pinilla
Nov 23, 2017·Proceedings of the National Academy of Sciences of the United States of America·Guillaume CornelisThierry Heidmann
Dec 10, 2019·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Paola María Sánchez-MartínezPedro M Sales Nunes
Feb 12, 2021·The Journal of Experimental Biology·Nathaly Hernández-DíazMartha Patricia Ramírez-Pinilla

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