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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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Variation in the rare lizard Barisia rudicollis Wiegmann Anguidae with description of a new species from Central Mexico.

Imbricate Alligator Lizard (Barisia imbricata) ยท

Potential distribution of the endemic imbricate alligator lizard Barisia imbricata imbricata in highlands of central Mexico. Catalogue of the slender-tongued saurians, with descriptions of many new genera and species. An annotated checklist and key to the reptiles of Mexico exclusive of the snakes.

Annals of the Carnegie Museum 54 5: Can you confirm these amateur observations of Barisia imbricata? In the neonates, the ovary contained oogonias and ovarian follicles, whereas the testicles showed testicular cords. Anfibios y Reptiles; pp. Tlalnepantla UNAM, pp. The generic name was derived from the Greek word barys, meaning “heavy,” apparently in reference to the robust body of B.

Check List 9 4: Isis von Oken 21 4: Tweet Please submit feedback about this entry to the curator. Find more photos by Google images search: Amphibians and reptiles of the state of Hidalgo, Mexico. Southwestern Naturalist 39 2: 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.


Courier Forschungsinstitut Senckenberg All neonates were sexed by eversion of hemipenes and some of their body characteristics were recorded. The herpetofauna of the Mexican State of Aguascalientes. Mesoamerican Herpetology 4 4: Gerrhonotine lizards with the skull not widened or depressed ; frontal bone not in contact with the maxillae ; pterygoid teeth absent or vestigial; dorsal osteoderms with a well-defined, strongly thickened basal area; lateral fold moderately to well developed, with a moderate or large granular area ; sides of the neck finely granular; postero-ventral surfaces of the forearms and shanks granular; minimum number of scales in a single row across the nape six to ten; anterior internasals present; postrostral present or absent; subocular and postocular series well differentiated from each other; the suboculars extend to the lowest primary temporal; twelve to fourteen ventral scale rows fide TIHEN Other pregnant females were kept in captivity in individual terraria until the time of delivery.

Gerrhonotine lizards recently added to the American Museum collection, with further revisions of the genus Abronia. Amphibians and reptiles of the state of Queretaro, Mexico. All neonates had hemipenes and sex could only be established through direct observation of the reproductive ducts and gonadal histology.

Barisia imbricata

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.

A review of the lizard genus Barisia. Etymology The generic name was derived from the Greek word barys, meaning “heavy,” apparently in reference to the robust body of B. Mocquard,Etudes sur les reptiles, p. Bulletin du Museum national d’Histoire naturelle, Paris, 4e ser.

Description of new genera and species of North American lizards in the museum of the Smithsonian Institution. Mesoamerican Herpetology 2 1: Cotttae, Stuttgartiae, Barjsia et Tubingiae, xxv-xxxvi pp. Gonadal development began at embryonic stage 33 and the hemipenes were visible at the same stage. Descriptiones et icones amphibiorum. Reptarium The Reptile Database.


Evolutionary speciation in the alligator lizards of the genus Barisia. Notes on amphibians and reptiles of Michoacan, Mexico. A conservation reassessment of the reptiles of Mexico based on barisa EVS measure.

Web pages and scripting Jiri Hosek. 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 barisua in both sexes.

Phylogeny and evolution of dorsal pattern in the Mexican endemic lizard genus Barisia Anguidae: On a collection of batrachians and reptiles from Mount Orizaba, Mexico, with descriptions of two new species.

Tenth contribution to the herpetology of Tropical America. Changes in the timing or sequence of development events are known as heterochrony. An updated checklist of the herpetofauna from Guerrero, Mexico. The herpetofauna of Oaxaca, Mexico: Catalogue of the lizards in the British Museum Natural History. Acta Zoologica Mexicana n. Notes on the Herpetofauna of Western Mexico The sexual development of saurians follows a similar pattern to that described for other amniotes.

ZMB imbricata Holotype: Burg and David Chiszar Catalogue of the specimens of lizards in the collection of the British Museum.