Abstract
The development of the foetal membranes in the Indian horse-shoe bat,Rhinolophus rouxi (Temminck) is studied. A diffuse chorio-vitelline placenta is present during the early gestation. This is abolished after the limb-bud stage due to the extension of the exocoelom between the splanchnopleure and the somatopleure. Finally the yolk-sac splanchnopleure lies near the placental disc as a collapsed bag with hypertrophied endodermal cells. The allantoic vesicle is large up to about mid pregnancy, but is lost in the latter half of pregnancy. An allantoic duct is present in the umbilical cord until full term. The definitive chorio-allantoic placenta is discoidal, mesometrial, labyrinthine, vasodichorial in some places and vasomonochorial in others. There is a deep cleft in the centre of the placental disc. Hence, in transverse sections the placenta appears to be partially divided into two discs.
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Abbreviations
- all.pl:
-
allantoic placenta
- all.v:
-
allantoic vesicle
- am:
-
amnion
- am.c:
-
amniotic cavity
- ch.pl:
-
chorionic placenta
- ch-v.pl:
-
chorio-vitelline placenta
- cyt:
-
cytotrophoblast
- exo:
-
exocoelom
- m.end:
-
maternal endothelium
- mes:
-
mesometrium
- y.s.:
-
yolk sac
- y-s.c:
-
yolk-sac cavity
- X:
-
cleft in the placenta
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Part of the Ph. D. thesis submitted to Nagpur University.
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Bhiwgade, D.A. Development of the foetal membranes in the Indian horse-shoe bat,Rhinolophus rouxi (Temminck). Proc. Indian Acad. Sci. 86, 61–72 (1977). https://doi.org/10.1007/BF03050899
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DOI: https://doi.org/10.1007/BF03050899