Hemipenes in females of the Mexican viviparous lizard Barisia imbricata ( Squamata: Anguidae): an example of heterochrony in sexual development. External character data from members of the Barisia imbricata complex support the validity of Tihen’s (b) arrangement, with two species (B. levicollis. PDF | Barisia imbricata imbricata is an endemic anguid lizard living in the highlands of central Mexico, mainly in the Trans-Mexican Volcanic.

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Barisia imbricata | Veracruz. | Ricardo Ramírez | Flickr

Etymology The generic name was derived from the Greek word barys, meaning “heavy,” apparently in reference to the robust body of B. In the neonates, the ovary contained oogonias and ovarian follicles, whereas the testicles showed testicular cords.

An annotated checklist and key to the reptiles of Mexico exclusive of the snakes. Anfibios y Reptiles; pp.

All neonates had hemipenes and sex could only be established through direct observation of the reproductive ducts and gonadal histology. Check List 9 4: Catalogue of the lizards in the British Museum Natural History. Scientific Reports, 8 1- get paper here Wiegmann,A. A conservation reassessment of the reptiles of Mexico based on the EVS measure.


Mesoamerican Herpetology 4 4: Phylogeny and evolution bariia dorsal pattern in the Mexican endemic lizard genus Barisia Anguidae: Changes in the timing or sequence of development events are known as heterochrony. Potential distribution of the endemic imbricate alligator lizard Barisia imbricata imbricata in highlands of central Mexico.

List of reptiles of Morelos, Mexico, and their distribution in relation to vegetation types. Rediscovery of a Mexican lizard, Barisia imbricata planifrons Bocourt.

Imbricate Alligator Lizard (Barisia imbricata) ·

Cotttae, Stuttgartiae, Monachii et Tubingiae, xxv-xxxvi pp. Amphibians and reptiles of the state of Queretaro, Mexico.

On a collection of batrachians and reptiles from Mount Orizaba, Mexico, with descriptions of two new species. We describe the pattern of sexual development in the viviparous Mexican lizard Barisia imbricata and report heterochrony in the regression of hemipenes in this lizard. Several neonates were sacrificed and processed to establish gonadal histology and the young of the remaining imbricqta were maintained in captivity imbicata observe the fate of the hemipenes in both sexes.

Notes on the Herpetofauna of Western Mexico Mesoamerican Herpetology 2 1: Southwestern Naturalist 39 2: Evolutionary speciation in the alligator lizards of the genus Barisia. The sexual development of saurians follows a similar pattern to that described for other amniotes. Amphibians and reptiles of the Seese and Mocino expedition: Courier Forschungsinstitut Senckenberg Tlalnepantla Imbrkcata, pp.


Barisia imbricata

Amphibians and reptiles of the state of Hidalgo, Mexico. Bulletin du Museum national d’Histoire naturelle, Paris, 4e ser. American Museum Novitates We think that the delayed regression of the hemipenes reflects evolutionary differences among reptiles and may be an indication of imbrricata stage in the evolutionary process of this species.

Can you confirm these amateur observations of Barisia imbricata? Other pregnant females were kept in captivity in individual terraria until the time of delivery. Variation in the rare lizard Barisia rudicollis Wiegmann Anguidae with description of a inbricata species from Central Mexico.

An updated checklist of the herpetofauna from Guerrero, Mexico. Journal of Zoological Systematics and Narisia Research 43 3: Annals of the Carnegie Museum 54 5: Gonadal development began at embryonic stage 33 and the hemipenes were visible at the same stage.