Placentation in the sea-snake,Enhydrina schistosa (Daudin)

@article{Kasturirangan1951PlacentationIT,
  title={Placentation in the sea-snake,Enhydrina schistosa (Daudin)},
  author={L. R. Kasturirangan},
  journal={Proceedings of the Indian Academy of Sciences - Section B},
  year={1951},
  volume={34},
  pages={1-32}
}
  • L. R. Kasturirangan
  • Published 1 July 1951
  • Biology
  • Proceedings of the Indian Academy of Sciences - Section B
Evolution & Development
  • 2019
A developmental synapomorphy of squamate reptiles
TLDR
Given its absence in mammals, chelonians, crocodylians, and birds, the YC–IYM complex warrants recognition as a developmental synapomorphy of the squamate clade.
Placental specializations in lecithotrophic viviparous squamate reptiles.
  • J. R. Stewart
  • Biology
    Journal of experimental zoology. Part B, Molecular and developmental evolution
  • 2015
TLDR
Comparative studies of squamate reproductive biology reveal that both uterine and embryonic structural modifications are commonly associated with viviparity, suggesting relatively rapid evolution of placental specializations.
Fine arrangement of photoreceptors in retina and mode of vision in beaked sea snake, Enhydrina schistosa (Daudin, 1803) (Reptilia: Hydrophiidae)
TLDR
The presence of three-layered spectacle, single-type, large and dispersed photosensitive cells was evidence of the low visual capability of the eyes in E. schistosa, corresponding to surveillance of aerial predators.
Histology and ultrastructure of the placental membranes of the viviparous brown snake, Storeria dekayi (Colubridae: Natricinae)
TLDR
Morphological evidence suggests that the allantoplacenta is specialized for gas exchange, and the omphalallantoic placenta, for maternal secretion and fetal absorption, and postulate that this pattern is characteristic of the thamnophine radiation of snakes.
Amniote Perspectives on the Evolutionary Origins of Viviparity and Placentation
TLDR
The findings reveal the difficulties in making evolutionary generalizations about viviparity across higher taxonomic boundaries, and the importance of employing quantitative phylogenetic analyses.
A review of the evolution of viviparity in lizards: structure, function and physiology of the placenta
TLDR
Reliance on provision of substantial organic nutrient is correlated with the regional specialisation of the chorioallantoic placenta to form a placentome for nutrient uptake, particularly lipids, and the further development of the gas exchange capabilities of the other parts of the Chorioallantois.
...
...

References

SHOWING 1-10 OF 12 REFERENCES
Memoirs: On the Nature of the Free Cell-Border of certain Mid-Gut Epithelia
TLDR
A thorough survey of the literature and from the own observations, it is concluded that there are two main types of cell-borders:Motile, i.e. ciliated; with which basal corpuscles, derived from division of the centrosomes, are always associated; and non-motile, where the elements are simple filaments and bear no relation to cilia.
A review of placentation among reptiles with particular regard to the function and evolution of the placenta
TLDR
It is suggested that in reptiles with and obvious reduction in the yolk-content of their eggs at the time of ovulation, and its invaribale accompaniment by a speciallized folded glandular area of allanto-placentation, theYolk-sac placenta would gradually lose significance as a water absorbing organ, but the most primitive expression of viviparity among repitles.
Physiology of reproduction.
Ovoviviparity in Sea-Snakes.
IN a communication on this subject in NATURE of Oct. 11, 1930, p. 568, Dr. Smith discusses my note on Laticauda colubrina. I am quite aware that Dr. Smith's statement that all sea-snakes are
Ovoviviparity in Sea-Snakes.
TLDR
My statement (which he quotes) that all sea-snakes are viviparous was not a reiteration of that of previous authors, but a confirmation, based upon personal knowledge of the group, which requires some qualification.
...
...