Sistrurus ravus is a venomous pit viper species, found only in Mexico. Three subspecies are currently recognized, including the nominate subspecies described. PDF | On Jun 1, , Rafael Alejandro Calzada-Arciniega and others published Crotalus ravus (Mexican Pygmy Rattlesnake) Diet. PDF | On Sep 30, , Anibal Díaz de la Vega-Pérez and others published Natural History Notes: Crotalus ravus, diet.

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Crotalus ravus Cope A preliminary account of the rattlesnakes with the descriptions of four new subspecies. Phylogeny of the rattlesnakes Crotalus and Sistrurus inferred from sequences of five mitochondrial DNA genes. Third contribution to the herpetology of tropical America.

Snake species of the world.

Mexican Pygmy Rattlesnake (Crotalus ravus) ·

In Sistrurus, the upper preocular is in contact with the postnasal, the rostral is not curved over the snout, cathus rostralis is sharply angled, dorsal xrotalus blotches are square or wider than long. Find more photos by Google images search: Oaxacan Pygmy Rattlesnake; exiguus: Retrieved 9 January Neurotoxic Paralysis Unlikely to occur.

WilliamsJeff Boundy In Biology of the Vipers, edited by Gordon W.

These effects would be uncommon and might occur in a few cases. Retrieved 4 March Mexico in the highlands of Oaxaca. These include local cauterization, incision, excision, amputation, suction by mouth, vacuum pump or syringe, combined incision and suction crotalue apparatusinjection or instillation of compounds such as potassium permanganate, phenol carbolic soap and trypsin, application of electric shocks or ice cryotherapyuse of traditional herbal, folk and other remedies including the ingestion of emetic plant products and parts of the snake, multiple incisions, tattooing and so on.


Mexico in the Sierra Madre del Sur of central Guerrero. Head is broad and distinct from narrow neck.

Antivenom Therapy Antivenom is the key treatment for systemic envenoming. The bite wound should not be tampered with in any way. Retrieved from ” https: Dorsal scales are moderately keeled. Taxonomic studies on rattlesnakes of Mainland Mexico.

General Shape Small in length, moderately stout, tapered and cylindrical bodied rattlesnake with a short tail terminating in a moderately small horny, segmented rattle. Do not use Tourniquets, cut, suck or scarify the wound or apply chemicals or electric shock.

If there will be considerable delay before reaching medical aid, measured in several hours to days, then give clear fluids by mouth to crotaous dehydration. Multiple doses may be required.

A follow-up study davus seven nuclear markers places S. No attempt should be made to pursue the snake into the undergrowth as this will risk further bites. Average Venom Qty Mesoamerican Herpetology 4 4: Venom Cardiotoxins Not likely to be present.


Mexican Pygmy Rattlesnake

Integrated Taxonomic Information System. Mesoamerican Herpetology 4 2: Best viewed in x resolution or higher.

A Taxonomic and Geographic Reference, vol. In Sistrurus the lateral hook of the squamosal makes an acute angle 45 to 80 degrees with the main part of the bone. Herpetological Review 10 1: An updated checklist of the herpetofauna from Guerrero, Mexico. On the generic classification of the rattlesnakes, with special reference to the Neotropical Crotalus durissus complex Squamata: Crotalus ravus is a venomous pit rabus species, found only in Mexico.

Crotalus ravus COPE, The type locality given is the “Table land of Mexico.

A Catalogue of Living and Extinct Species. Crotalus ravus Cope, The basis for reassurance is the fact that many venomous bites do not result in envenoming, the relatively slow progression to severe envenoming hours following elapid bites, days following viper bites and the effectiveness of modern medical treatment.

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