Results 131 to 140 of about 679 (169)

The chromosomes of Metachirus nudicaudatus (Marsupialia : Didelphidae)

Australian Journal of Zoology, 1973
A karyologic study of M. nudicaudatus, carried out on three females and five males, shows a chromosome number of 14, with apparent lack of dimorphism in the sex chromosomes. Nevertheless, the heterochromatin staining technique reveals the Y chromosome to be fully heteropycnotic. The meiotic chromosome has a sex vesicle at the pachytene stage.
E Yunis, J Cayon, E Ramirez
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The chromosomes of the Didelphidae (Marsupialia) and their evolutionary significance

Biological Journal of the Linnean Society, 1977
One hundred and seventy-seven specimens of American didelphids, representing 9 genera and 22 species have been studied for their chromosomal constitution. Didelphids are very conservative in chromosomal complements. All of the studied species can be sorted into one of three kinds of karyotypes: 2n= 14 (three species of Didelphis, one of Lutreolina, two
OSVALDO A. REIG, ALFRED L. GARDNER, NESTOR O. BIANCHI, JAMES L. PATTON   +3 more
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Breeding of Philander frenata (Didelphimorphia, Didelphidae) in captivity

Laboratory Animals, 1998
Data on the reproductive biology and laboratory management of Philander frenata are presented here. Sensory contact before pairing increased breeding success and reduced aggression between pairs. Gestation period was 13–14 days, with a post-lactation oestrous. Births occurred only between August and February.
E, Hingst, P S, D'Andrea, R, Santori, R, Cerqueira   +3 more
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The Distribution of Didelphis in South America (Polyprotodontia, Didelphidae)

Journal of Biogeography, 1985
Rui Cerqueira
exaly   +2 more sources

Cytogenetic analysis of some Brazilian marsupials (Didelphidae: Marsupialia)

Canadian Journal of Genetics and Cytology, 1986
Three species of marsupials from the Amazon region (Marmosa cinerea, Caluromys lanatus, and Didelphis marsupialis) and two from the region of São Paulo (Didelphis marsupialis and Didelphis albiventris) were studied. The G-banding pattern of the species with 2n = 14 (M. cinerea and C.
Casartelli, C, Rogatto, S R, Ferrari, I
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Didelphidae

2015
Astúa, D. (2015): Didelphidae. In: Russel A. Mittermeier, Don E. Wilson (Eds): Handbook of the Mammals of the World – Volume 5 Monotremes and Marsupials.
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Form, Function and Evolution of the Skull of Didelphid Marsupials (Didelphimorphia: Didelphidae)

Journal of Mammalian Evolution, 2020
Although didelphid marsupials are considered to have a conservative body shape, they show a considerable amount of size variation. They also have different diets (from frugivore to animalivore), but none of the species are specialized. Didelphid marsupials also have a certain degree of specialization in vertical habitat use, from ground-dwellers to ...
Chemisquy, M. Amelia, Tarquini, Sergio Daniel, Romano Muñoz, Cristo, Prevosti, Francisco   +3 more
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The family Didelphidae as a host of zoonotic pathogens

Therya Notes
The family Didelphidae has often been associated with transmission cycles of zoonotic diseases, such as Leishmaniasis and Chagas disease.  In this work, we review the scientific literature published from 1994 to 2024 on studies of the family Didelphidae and its pathogens.
Víctor Sánchez-Cordero, Ángel Rodríguez-Moreno, José Juan Flores-Martínez, Gabriel Gutiérrez-Granados   +3 more
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Extreme bilateral molar rotation in monodelphis domestica (marsupialia: didelphidae)

Archives of Oral Biology, 1997
Rotation of a tooth around an axis perpendicular to the occlusal plane through angles approaching 180 degrees is a rare anomaly found in the mammalian dentition. A specimen of Monodelphis domestica was found to show such extreme rotation of both lower last molars, with consequent disruption of normal occlusion and wear.
A F, Van Nievelt, K K, Smith
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Tooth onoteny in Didelphis virginiana (Marsupialia : Didelphidae)

Australian Journal of Zoology, 1978
The ontogenetic development of the teeth was studied in a series of seven specimens of Didelphis virginiana whose crown-rump length varied from 11 to 49 mm. Though all developing teeth showed undifferentiated lingual downgrowths of dental lamina, there was no evidence of any non-functional teeth. No more than five upper incisors were present at any one
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