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Anura definition: one of the three orders of extant amphibians, comprising the frogs and toads.
Anura definition: An order of the class Amphibia, which includes several families of frogs and toads. They are characterized by well developed hind limbs adapted for jumping, fused head and trunk and webbed toes. The term "toad" is ambiguous and is properly applied only to the family Bufonidae.
Frog definition: An amphibian in the order Anura, which includes the toads. The commonest frog genera are Rana (grass frogs) and Hyla (tree frogs).
Pipidae definition: A family of the order Anura, distinguished by the lack of a tongue. It includes four living genera of aquatic "toads". Two of the most familiar pipids are the popularly called Surinam "toad" (Pipa pipa) and XENOPUS LAEVIS.
Rana esculenta definition: An edible species of the family Ranidae, occurring in Europe and used extensively in biomedical research. Commonly referred to as "edible frog".
Rana pipiens definition: A highly variable species of the family Ranidae in Canada, the United States and Central America. It is the most widely used Anuran in biomedical research.
Ranidae definition: The family of true frogs of the order Anura. The family occurs worldwide except in Antarctica.

The need for water quality criteria for frogs.

R Boyer et al.

Environmental Health Perspectives , 01 Apr 1995

Limb malformations and abnormal sex hormone concentrations in frogs.

S A Sower et al.

Environmental Health Perspectives , 01 Nov 2000

Expression of 5S rDNA in the oocytes of water frogs

Elżbieta Czarniewska et al.

BMC Research Notes , 19 Jan 2009

Thymus Ontogeny in Frogs: T-Cell Renewal at Metamorphosis

Louise A. Rollins-Smith et al.

Developmental Immunology , 1992

Strategies for assessing the implications of malformed frogs for environmental health.

J G Burkhart et al.

Environmental Health Perspectives , 01 Jan 2000

Road Proximity Increases Risk of Skeletal Abnormalities in Wood Frogs from National Wildlife Refuges in Alaska

Mari K. Reeves et al.

Environmental Health Perspectives , 01 Aug 2008

Underestimation of Species Richness in Neotropical Frogs Revealed by mtDNA Analyses

Antoine Fouquet et al.

PLoS ONE , 31 Oct 2007

Forms and prevalence of intersexuality and effects of environmental contaminants on sexuality in cricket frogs (Acris crepitans).

A L Reeder et al.

Environmental Health Perspectives , 01 May 1998

Evolutionary Toxicology: Population-Level Effects of Chronic Contaminant Exposure on the Marsh Frogs ( Rana ridibunda ) of Azerbaijan

Cole W. Matson et al.

Environmental Health Perspectives , 01 Apr 2006

Atrazine-induced hermaphroditism at 0.1 ppb in American leopard frogs (Rana pipiens): laboratory and field evidence.

Tyrone Hayes et al.

Environmental Health Perspectives , 01 Apr 2003

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