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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Tweet Please submit feedback about this entry to the curator. Potential distribution of the endemic imbricate alligator lizard Barisia imbricata imbricata in highlands of central Mexico.

Etymology The generic name was derived from the Greek word barys, meaning “heavy,” apparently in reference to the robust body of B. Variation in the rare lizard Barisia rudicollis Wiegmann Anguidae with description of a new species from Central Mexico.

Mesoamerican Herpetology 4 4: Southwestern Naturalist 39 2: Evolutionary speciation in the alligator lizards of the genus Barisia. Anfibios y Reptiles; pp.

Developmental asynchrony and antagonism of sex determination pathways in a lizard with temperature-induced sex reversal. Reptarium The Reptile Database. Annals of the Carnegie Museum 54 5: Phylogeny and evolution of dorsal pattern in the Mexican endemic lizard genus Barisia Anguidae: A review of the lizard genus Barisia.


The sexual development of saurians follows a similar pattern to that described for other amniotes. Description of new genera and species of North American lizards in the museum of the Smithsonian Institution.

Mesoamerican Herpetology 2 1: In the neonates, the ovary contained oogonias and ovarian follicles, whereas the testicles showed testicular cords. ZMB imbricata Holotype: Amphibians and reptiles of the state of Queretaro, Mexico.

The herpetofauna of the Mexican State of Imbricwta. Amphibians and reptiles of the Seese and Mocino expedition: The generic name was derived from the Greek word barys, meaning “heavy,” apparently in reference to the robust body of B.

IUCN Red List of Threatened Species

All neonates had hemipenes and sex could only be established through direct observation of the reproductive ducts and gonadal histology. Gonadal development began imbrifata embryonic stage 33 and the hemipenes were visible at the same stage. Gerrhonotine lizards recently added to the American Museum collection, with further revisions of the genus Abronia.


Catalogue of the slender-tongued saurians, with descriptions of many new genera and species.

Cotttae, Stuttgartiae, Monachii et Tubingiae, xxv-xxxvi pp. Acta Zoologica Mexicana n. Several neonates were sacrificed and processed to establish gonadal histology and the young of the remaining litters were maintained in captivity to observe the fate of the hemipenes in both sexes.

Barisia imbricata

Journal of Zoological Systematics and Evolutionary Research 43 3: Other pregnant females were kept in captivity in individual terraria until the time of delivery. Amphibia-Reptilia – get paper here Tihen, J. Catalogue of the lizards in the British Museum Natural History. Check List 9 4: We collected gestating females; some lizards were subjected to partial hysterectomy and the embryos were processed using routine histological technique to assess gonadal development; the remaining embryos were used to assess the development of hemipenes.