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Embryonic and Fetal Development in – Pigmy Rice Rat – O ligoryzomys sp. ( R odentia, S igmodontinae) and its Significance for Being a new Experimental Model
Author(s) -
Favaron P. O.,
Rodrigues M. N.,
Oliveira M. F.,
Biasi C. M.,
Miglino M. A.
Publication year - 2012
Publication title -
anatomia, histologia, embryologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.34
H-Index - 35
eISSN - 1439-0264
pISSN - 0340-2096
DOI - 10.1111/j.1439-0264.2012.01136.x
Subject(s) - cricetidae , biology , zoology , embryogenesis , rodent , fetus , sigmodontinae , ontogeny , embryo , andrology , anatomy , microbiology and biotechnology , ecology , genetics , pregnancy , medicine
Summary O ligoryzomys ( C ricetidae, S igmodontinae) is a common rodent genus from S outh A merica that includes a couple of very similar species. Related species have been used as experimental model for understanding several diseases for which these species are reservoirs. In order to provide a better understanding of the embryological aspects of this group, herein we showed data on the embryonic and fetal development in O ligoryzomys sp. Eight specimens of different stages of gestation were obtained from the C ollection of the Z oology M useum of U niversity of S ao P aulo, B razil. Gestational ages were estimated by crown‐rump‐length according to Evans and Sack (1973). To address our analysis after examining the gross morphology, tissues from several organs were processed for light and scanning electron microscopy. Morphological data on the systems (nervous system, cardiorespiratory system, intestinal tract and urogenital system) were described in detail. Finally, the findings were compared with what is known about embryological aspects in other rodent species in order to establish similarities and differences during the organogenesis in different species.