Dasypus novemcinctus. Categorización 2019 de los mamíferos de Argentina según su riesgo de extinción.

1977 ◽

Vol 35 ◽

pp. 640-641

Author(s):

J. R. Ruby

Keyword(s):

Endoplasmic Reticulum ◽

Parotid Gland ◽

Periodic Acid ◽

Acinar Cells ◽

Duct System ◽

Parotid Glands ◽

Dasypus Novemcinctus ◽

Anterior Portion ◽

Periodic Acid Schiff ◽

Thin Sections

Parotid glands were obtained from five adult (four male and one female) armadillos (Dasypus novemcinctus) which were perfusion-fixed. The glands were located in a position similar to that of most mammals. They extended interiorly to the anterior portion of the submandibular gland.In the light microscope, it was noted that the acini were relatively small and stained strongly positive with the periodic acid-Schiff (PAS) and alcian blue techniques, confirming the earlier results of Shackleford (1). Based on these qualities and other structural criteria, these cells have been classified as seromucous (2). The duct system was well developed. There were numerous intercalated ducts and intralobular striated ducts. The striated duct cells contained large amounts of PAS-positive substance.Thin sections revealed that the acinar cells were pyramidal in shape and contained a basally placed, slightly flattened nucleus (Fig. 1). The rough endoplasmic reticulum was also at the base of the cell.

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Identification of Bloodmeals from Sand Flies (Diptera: Psychodidae) Collected in the Parque Nacional do Viruá, State of Roraima, Brazil

Journal of Medical Entomology ◽

10.1093/jme/tjab068 ◽

2021 ◽

Author(s):

Bruno Leite Rodrigues ◽

Glaucilene da Silva Costa ◽

Paloma Helena Fernandes Shimabukuro

Keyword(s):

Blood Feeding ◽

Sand Flies ◽

Feeding Preferences ◽

Light Traps ◽

Dasypus Novemcinctus ◽

Search Tool ◽

Vertebrate Hosts ◽

Host Blood ◽

Clustering Pattern ◽

Species Being

Abstract The transmission of pathogens that cause leishmaniases occurs by the bite of female sand flies (Diptera: Psychodidae) in their vertebrate hosts, which makes the identification of their bloodmeal sources an important step for the control and epidemiology of these diseases. In Brazil, the state of Roraima has a great diversity of sand flies, vertebrate hosts, and protozoan Leishmania, but little is known about the host blood-feeding preferences of sand flies. Thus, we evaluated the bloodmeal sources of sand flies collected from their sylvatic habitats in Parque Nacional do Viruá, Roraima. Fieldwork was carried-out between 13th and 18th August 2019 using CDC light traps. Sand flies were slide-mounted and morphologically identified using the head and last segments of the abdomen. Engorged females had their DNA extracted, followed by amplification and sequencing of the cytochrome b (cytb) molecular marker for vertebrates. Sequences were analyzed and compared with those from GenBank using the BLASTn search tool, in addition to the reconstruction of a phylogenetic tree to demonstrate the clustering pattern of these sequences. A total of 1,209 sand flies were identified, comprising 20 species, in which the most abundant were Psychodopygus ayrozai (Barretto and Coutinho) (42.10%) and Psychodopygus chagasi (Costa Lima) (26.22%). Bloodmeal source identification was successfully performed for 34 sand flies, that confirm four vertebrate species, being the most abundant the armadillo Dasypus novemcinctus Linnaeus, 1758 (Cingulata: Dasypodidae).

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Paracoccidioides brasiliensis Isolated from Nine-Banded Armadillos (Dasypus novemcinctus) Reveal Population Structure and Admixture in the Amazon Basin

Journal of Fungi ◽

10.3390/jof7010054 ◽

2021 ◽

Vol 7 (1) ◽

pp. 54

Author(s):

Eduardo Bagagli ◽

Daniel Ricardo Matute ◽

Hans Garcia Garces ◽

Bernardo Guerra Tenório ◽

Adalberto Garcia Garces ◽

...

Keyword(s):

Population Structure ◽

Latin America ◽

Endemic Area ◽

Amazon Basin ◽

Paracoccidioides Brasiliensis ◽

Pathogenic Fungi ◽

Sensu Stricto ◽

Species Level ◽

Dasypus Novemcinctus ◽

Show Evidence

Paracoccidioidomycosis is an endemic fungal disease to Latin America caused by at least five species-level genotypes of Paracoccidioides, named P. lutzii, P. brasiliensis (S1a and S1b populations), P. americana, P. restrepiensis, and P. venezuelensis. In this manuscript, we report on Paracoccidioides sp. sampling efforts in armadillos from two different areas in Brazil. We sequenced the genomes of seven Paracoccidioides isolates and used phylogenomics and populations genetics for genotyping. We found that P. brasiliensis and P. lutzii are both present in the Amazon region. Additionally, we identified two Paracoccidioides isolates that seem to be the result of admixture between divergent populations within P. brasiliensis sensu stricto. Both of these isolates were recovered from armadillos in a P. lutzii endemic area in Midwestern Brazil. Additionally, two isolates from human patients also show evidence of resulting from admixture. Our results suggest that the populations of P. brasiliensis sensu stricto exchange genes in nature. More generally, they suggest that population structure and admixture within species is an important source of variation for pathogenic fungi.

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The Dasypodidae (Mammalia, Xenarthra) from the Urso Fóssil Cave (Quaternary), Parque Nacional de Ubajara, State of Ceará, Brazil: paleoecological and taxonomic aspects

Anais da Academia Brasileira de Ciências ◽

10.1590/0001-3765201420120029 ◽

2014 ◽

Vol 86 (1) ◽

pp. 147-158 ◽

Cited By ~ 4

Author(s):

PAULO V. OLIVEIRA ◽

ANA MARIA RIBEIRO ◽

ÉDISON V. OLIVEIRA ◽

MARIA SOMÁLIA S. VIANA

Keyword(s):

Environmental Conditions ◽

Feeding Habits ◽

Early Holocene ◽

Northeastern Brazil ◽

Dasypus Novemcinctus ◽

Sediment Samples ◽

Wide Geographical Distribution ◽

Anthropogenic Action ◽

Euphractus Sexcinctus ◽

Northwest Region

This paper deals with xenarthrans osteoderms assigned to Dasypus aff. D. novemcinctus, Euphractus sexcinctus and Cabassous sp. The material was collected in subsurface, from 0.10 to 0.60 m in the Urso Fóssil Cave, Parque Nacional de Ubajara, State of Ceará, northeastern Brazil. The ages of sediment samples from levels 4 and 5 (depths of 0.40 and 0.50 m) were determined by thermoluminescence technique, and indicated ages of 8,000 and 8,200 years BP for each layer respectively. The presence in these layers of early Holocene xenarthrans taxa can contribute to the understanding of the biotic evolution of the northwest region of Ceará during the last 10,000 years. Two of the three identified taxa still occur in the region: Dasypus novemcinctus and Euphractus sexcinctus. The Dasypodidae fauna here reported includes animals with generalist feeding habits and current wide geographical distribution. It is suggested, therefore, that the climatic and environmental conditions in the early Holocene were very similar the actual ones, and that the absence of Cabassous may be conditioned to other factors, such as anthropogenic action and loss of habitat by fragmentation of the vegetation.

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