CALYPTOCEPHALELLA GAYI PDF

Confused by a class within a class or an order within an order? Please see our brief essay. Help us improve the site by taking our survey. To cite this page: Myers, P. Espinosa, C. Parr, T.

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This frog has a robust body and a large head with a short round snout. The eyes are small, with vertical pupils and bronze irises. A distinct tympanum is visible. The skin has elongated bumps on the dorsum. Fingers are unwebbed while toes are half-webbed. These frogs are dull brown, with grayish-white bellies. During breeding season, males have nuptial pads on their thumbs Duellman The body and foremost part of the tail are grayish brown in color Duellman, or light green Diaz and Valencia , while the posterior part of the tail is black or dark brown Duellman The spiracle is equidistant between the snout and the vent Diaz and Valencia The dorsal fin extends over the tail base, with the tail base narrower than half of the maximum body width Diaz and Valencia The oral disc is small narrower than a third of the body width , and there is no anal tube Diaz and Valencia Helmeted Water Toads are found in the lowlands of Chile, up to m in elevation Stuart They inhabit aquatic environments, such as lakes, rivers and ponds Duellman The tadpoles prefer large bodies of lentic water Diaz and Valencia When threatened, this frog becomes aggressive.

It will inflate and elevate its body, open its mouth, lunge, and bite potential predators Duellman During the mating season from September through October, males give off a loud "oouu".

Amplexus is axillary. After mating, females lay clutches of eggs in shallow water. The clutches consist of one to ten thousand eggs laid in clumps. Hatching occurs in about three weeks Duellman The larvae are found in bodies of slow-moving water with muddy bottoms and plentiful vegetation, at depths of at least 1 m Diaz and Valencia Calyptocephallela gayi larvae are large, slow swimmers Diaz and Valencia It takes up to two years before they metamorphose into froglets Diaz and Valencia , with the typical larval period extending from months Castaneda et al The froglets measure at least 2.

The adult diet consists of aquatic insect larvae, fishes, frogs, and small birds and mammals Duellman Trends and Threats Their populations have declined due to hunting as well as loss of habitat Duellman Possible reasons for amphibian decline Drainage of habitat Local pesticides, fertilizers, and pollutants Predators natural or introduced Intentional mortality over-harvesting, pet trade or collecting Comments This species was formerly named Caudiverbera caudiverbera but renamed by Myers and Stothers on finding that the original name was based on a mythical species.

This species is found in Chile and may possibly occur in Argentina, in deep ponds and reservoirs. Threats include harvesting for local consumption, water pollution, and consumption by introduced trout, and pond drainage. Recent trade data for to do not specifically indicate the importation of the species into the United States. It is listed as vulnerable by IUCN with a declining population trend.

There is no indication that trade is impacting the wild population. However, the U. Fish and Wildlife Service reports that the U. Comments pertaining to species proposals should be sent to the Division of Scientific Authority, U. Comments pertaining to proposed resolutions, decisions, and agenda items should be sent to the Division of Management Authority, U. Conservation Status definitions. View distribution map using BerkeleyMapper.

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Calyptocephalella gayi

This frog has a robust body and a large head with a short round snout. The eyes are small, with vertical pupils and bronze irises. A distinct tympanum is visible. The skin has elongated bumps on the dorsum. Fingers are unwebbed while toes are half-webbed. These frogs are dull brown, with grayish-white bellies. During breeding season, males have nuptial pads on their thumbs Duellman

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Herpetology Notes

CITES is an international agreement between governments, aimed to ensure that international trade in specimens of wild animals and plants does not threaten their survival. Skip to main content. FR ES. Search form Search. Essential information for applying, implementing and enforcing the Convention. Reporting requirements Annual report Annual Illegal trade report Implementation report Ad hoc reports. Enforcement Introduction Enforcement focal points Wildlife crime linked to the Internet Wildlife forensics.

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It's the Helmeted water toad… this time, with information!

Calyptocephalella gayi is one of over 6, neobatrachians arranged into two main groups, Hyloides and Ranoides. Phylogenetically, C. The ontogeny of the postcranial skeleton of C. The description is based on pattern of chondrification and ossification of skeletal elements in a growth series of tadpoles, on juveniles and adult individuals. Particular attention was devoted to some developmental aspects and morphological traits of the adult skeleton. The body of Presacral Vertebra VIII is formed from three centers of ossification, in contrast to the usual two dorsolateral centers observed in the remaining vertebrae of C. Each half of the pelvic girdle arises from a single cartilaginous element.

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Calyptocephalella is a genus of frogs in the family Calyptocephalellidae. It is represented by a single living species, Calyptocephalella gayi , commonly known as the helmeted water toad , Chilean helmeted bull frog or wide-mouth toad. Additionally, there are a few extinct species that only are known from Late Cretaceous and Paleogene fossil remains from Patagonia in South America and in the Antarctic Peninsula at times when it was warmer and wetter. This very large toad typically weighs up to 0. It is threatened by capture for human consumption, habitat loss , pollution, introduced species and the disease chytridiomycosis.

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