Syncranial osteology of the Nine-Banded Armadillo, <em>Dasypus novemcinctus</em>, from south Brazil

Quantitative investigation of the annual pattern of follicular development in the nine-banded armadillo (Dasypus novemcinctus).

Mature, non-pregnant, female armadillos (Dasypus novemcinctus) were killed throughout the year (3-6/month, N = 54) and both ovaries were examined for follicular development. All normal and atretic follicles > 358 micrometers were counte. Total number of normal follicles remained constant from January to June but decreased by 50% in the remaining months except in October and November. Follicles ...

Expansion of the tunica albuginea during penile inflation in the nine-banded armadillo (Dasypus novemcinctus).

Artificial inflation of corpora cavernosa from the nine-banded armadillo (Dasypus novemcinctus) showed that the expansion of the tunica albuginea during erection increases both components of flexural stiffness: the second moment of area and Young's modulus of elasticity. Folded tissue and crimped collagen fibers in the tunica albuginea permit its expansion during erection. As the tunica albugin...

Axial orthogonal fiber reinforcement in the penis of the nine-banded armadillo (Dasypus novemcinctus).

Examination of histological sections from flaccid and artificially erected nine-banded armadillo (Dasypus novemcinctus) penises confirms that the mammalian corpus cavernosum is the first known biological hydrostat reinforced by collagen fibers arranged at 0 degree and 90 degrees to its long axis. The morphology of this axial orthogonal fiber array affects the mechanical behavior of mammalian pe...

Genetic structure and diversity of the nine-banded armadillo in Mexico

The structure and genetic diversity of a widely distributed species in a recently colonized area is influenced by the colonizing lineages, life-history traits, and biotic and abiotic factors. The connection established during the Pliocene between North and South America allowed the nine-banded armadillo (Dasypus novemcinctus) to expand its distributional range northward. High levels of genetic ...

Recent Northern Records of the Nine-banded Armadillo (dasypodidae) in Nebraska