Marsupial morphology of reproduction: South America opossum male model

  title={Marsupial morphology of reproduction: South America opossum male model},
  author={Michelle Barros and Jo{\~a}o Fl{\'a}vio Panattoni Martins and V{\'i}vian Yochiko Samoto and Vanessa Cristina Oliveira and Natalia Juliana Nardelli Gonçalves and Celina Almeida Furlaneto. Mançanares and Atan{\'a}sio Serafim Vidane and Ana Fl{\'a}via de Carvalho and Carlos Eduardo Ambr{\'o}sio and Mar{\'i}a Ang{\'e}lica Miglino},
  journal={Microscopy Research and Technique},
This study aims to describe the morphology of Didelphis sp. male genital organs (penis, testes, epididymis, ductus deferens, prostate, and bulbourethral gland). [] Key Method Ten male animals were used, eight for macroscopic and light microscopy analysis, and two for scanning electron microscopy. The testes and epididymis showed similarity to other eutherian mammals.

Morphological Tools for Describing the Male External Genitalia of Sapajus apella

Sapajus apella is a wild monkey of South America distributed across almost all of Brazil. This species adapts to domesticated life and reproduces easily. The present study describes the macro- and

Morphology of the vaginal complex in the white‐eared opossum (Didelphis albiventris): Gross anatomy and light microscopy

The morphology of vaginal complex of white‐eared opossum is similar to those reported for other marsupials, showing similar histological features.

Morfologia do escroto, do testículo e das vias espermáticas de Metachirus nudicaudatus (Geoffroy, 1803), Didelphidae-Marsupialia

Gonads and sperm pathways of five adult male  Metachirus nudicaudatus  in the reproductive phase were used to describe the morphology of scrotum, testicle, and spermatic tract.  M. nudicaudatus  has

Estereologia das glândulas bulbouretrais do coelho (Oryctolagus cuniculus) e da cobaia (Cavia porcellus)

Compared stereological characteristics between the rabbit and guinea pig GBU as a first approximation in the understanding of morphometric variables involved in reproductive processes to consider the morphological characteristics of the GBU in these animals could affect the successful reproduction by the male.

A relative shift in cloacal location repositions external genitalia in amniote evolution

It is shown that the developmental origin of external genitalia has shifted through evolution, and in some taxa limbs and genitals share a common primordium, and it is suggested that a change in the relative position of the cloacal signalling centre during evolution has led to an altered developmental route forExternal genitalia in mammals, while preserving parts of the ancestral limb molecular circuitry owing to a common evolutionary origin.


The LigaSure provides a rapid, technologically simple and safe surgical technique for scrotal ablation and orchiectomy in the marsupial patient that minimizes surgical, anesthetic, and recovery times.

Cell Proliferation and Epithelia Profile in Prostate Cancer and Benign Prostatic Hyperplasia

Ki-67 expression indicates the rate of cell proliferation and the aggressiveness of such tumors, while ECAD shows defective cytoskeleton and extent of malignancy.

CK5/6, CK7 and E-Cadherin; Molecular Differentiation of PCa and BPH Tissue Biopsies

Prostate biopsy samples collected from the pathology laboratory were immunohistochemically analyzed to distinguish cell proliferation of BPH from PCa and down regulation of ECAD, indicating that increased population of cells in BPH is not a cancer and is not glandular.

Supercritical CO2 Foaming of Thermoplastic Materials Derived from Maize: Proof-of-Concept Use in Mammalian Cell Culture Applications

It is proposed that a key indicator of foamability is the strain at break of the materials to be foamed (as calculated from stress vs. strain rate curves) and zein foams exhibit attractive properties (average pore size, poresize distribution, and porosity) for cell culture applications.




The male genital system was examined in 9 male specimens of Chironectes minimus from Brazil and found that C. minimus has a segmented carrot-shaped prostate gland with 3 anatomical segments that can be distinguished by color, length, and diameter in adults.

Análise histológica das glândulas uretrais da capivara (Hydrochoerus hydrochaeris)

To perform a microscopic study of the glands attached to the male urethra, two adult capybaras were used and no secretory epithelium corresponding to bulbourethral glands was identified; morphologically it resembles to the other histricomorphs.

Microscopic anatomy of the scrotum, testis with its excurrent duct system and spermatic cord of Didelphis azarae.

The authors give a description of the microscopic anatomy of the scrotum, testis and its excurrent duct system and the structures of the spermatic cord, which shows a well-developed cremaster muscle.

Aspectos histológicos e morfométricos dos testículos de gatos domésticos (Felis catus)

A comparative histologic and morphometric study of the testes of domestic cats distributed into two groups: Group 1, cats until 1 year of age, and Group 2, cats over 1 year, found that 1-year-old cats showed testicular histological features of an adult animal.

Morfologia dos órgãos genitais masculinos de quati (Nasua nasua, Linnaeus 1766)

The penis of the Nasua nasua was not suspended, but was stuck to the abdominal skin in two of the sexually immature animals, while in the three other mature animals, the penis was suspended between the pelvic members.

Descrição morfológica do sistema reprodutor masculino de jaguatirica (Leopardus pardalis)

The reproductive system of a young male taken from the area of Mina de Bauxita Paragominas/PA - Vale do Rio Doce, that was donated post mortem to the Instituto de Saude e Producao Animal (ISPA) of the Universidade Federal Rural da Amazonia (UFRA).

Morfofisiologia do tecido intertubular e das células de Leydig de jaguatirica (Leopardus pardalis) adulta

TheIntertubular compartment showed a clear pattern of type II and the conjunctive tissue was the most abundant component of the intertubular tissue and the average number per gram of testis was within the range described for most mammals.

Aspectos macroscópicos e morfométricos dos testículos em catetos e queixadas

The results obtained show that in the adult white-lipped peccary group, the right testicle measured, in average, length, width and thickness of 5.36 ± 0.64cm, while the left testicles measured, on average, 5.30 ±0.52cm, which does not have significative difference between right and left testicular measurements using the Qui-square test.

Sex down under: the differentiation of sexual dimorphisms during marsupial development.

Marsupial neonate has a well-developed digestive, respiratory and circulatory system, but retains its fetal excretory system with a fully functional mesonephric kidney and undifferentiated gonads and genitalia.