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 – photos

Isis von Oken 21 4: Web pages and scripting Jiri Hosek. Variation in the rare lizard Barisia rudicollis Wiegmann Anguidae with description of a new species from Central Mexico. Notes on the Herpetofauna of Western Mexico Etymology The generic name was derived from the Greek word barys, meaning “heavy,” apparently in reference to the robust body of B.

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

Courier Forschungsinstitut Senckenberg 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.

Amphibians and reptiles of the state of Queretaro, Mexico.

Description of imbrjcata genera and species of North American lizards in the museum of the Smithsonian Institution. The generic name was derived from the Greek word barys, meaning “heavy,” apparently in reference to the robust body of B. All neonates had hemipenes and sex could only be established through direct observation of the reproductive ducts and gonadal histology. Catalogue of the specimens of lizards in the collection of the British Museum.

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Check List 9 4: In the neonates, the ovary contained oogonias and ovarian follicles, whereas the testicles showed testicular cords. Reptarium The Reptile Database. Gerrhonotus Barisia imbricata ciliaris. Gonadal development began at embryonic stage 33 and the hemipenes were visible at the same stage. Amphibians and reptiles of the Seese and Mocino expedition: Catalogue of the lizards in the British Museum Natural History. Acta Zoologica Mexicana n.

Descriptiones et icones amphibiorum. Evolutionary speciation in the alligator lizards of the genus Barisia.

Notes on amphibians and reptiles of Michoacan, Mexico. The sexual development of saurians follows a similar pattern to that described for other amniotes. Mocquard,Etudes sur les reptiles, p. Tlalnepantla UNAM, pp.

Barisia imbricata – Wikipedia

Phylogeny and evolution of dorsal pattern in the Mexican endemic lizard genus Barisia Anguidae: Mesoamerican Herpetology 4 4: Southwestern Naturalist 39 2: Cotttae, Stuttgartiae, Monachii et Tubingiae, xxv-xxxvi pp. Rediscovery of a Mexican lizard, Barisia imbricata planifrons Bocourt.

A conservation reassessment of the reptiles of Mexico based on the EVS measure. 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.

Amphibians and reptiles of barosia state of Hidalgo, Mexico. The herpetofauna imbricaga the Mexican State of Aguascalientes. Journal of Zoological Systematics and Evolutionary Research 43 3: Annals of the Carnegie Museum 54 5: Burg and David Chiszar Check List 11 3: Bulletin du Museum national d’Histoire naturelle, Paris, 4e ser.

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A review of the lizard genus Barisia. An annotated checklist and key to the reptiles of Mexico exclusive of the snakes. On a collection of batrachians and reptiles from Mount Orizaba, Mexico, with descriptions of two new species. ZMB imbricata Holotype: The herpetofauna of Puebla, Mexico: Changes in the timing or sequence of development events are known as heterochrony.

Gerrhonotine lizards with the skull not widened or depressed ; frontal bone not in contact with the maxillae ; pterygoid teeth absent or vestigial; dorsal osteoderms barksia 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 imbdicata 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