True frog

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True frog_table_infobox_0

True frogsTrue frog_header_cell_0_0_0
Scientific classification RanidaeTrue frog_header_cell_0_1_0
Kingdom:True frog_cell_0_2_0 AnimaliaTrue frog_cell_0_2_1
Phylum:True frog_cell_0_3_0 ChordataTrue frog_cell_0_3_1
Class:True frog_cell_0_4_0 AmphibiaTrue frog_cell_0_4_1
Order:True frog_cell_0_5_0 AnuraTrue frog_cell_0_5_1
Suborder:True frog_cell_0_6_0 NeobatrachiaTrue frog_cell_0_6_1
Clade:True frog_cell_0_7_0 RanoideaTrue frog_cell_0_7_1
Family:True frog_cell_0_8_0 Ranidae

Rafinesque, 1814True frog_cell_0_8_1

SynonymsTrue frog_header_cell_0_9_0

The true frogs, family Ranidae, have the widest distribution of any frog family. True frog_sentence_0

They are abundant throughout most of the world, occurring on all continents except Antarctica. True frog_sentence_1

The true frogs are present in North America, northern South America, Europe, Africa (including Madagascar), and Asia. True frog_sentence_2

The Asian range extends across the East Indies to New Guinea and a single species (the Australian wood frog (Hylarana daemelii)) has spread into the far north of Australia. True frog_sentence_3

Typically, true frogs are smooth and moist-skinned, with large, powerful legs and extensively webbed feet. True frog_sentence_4

The true frogs vary greatly in size, ranging from small—such as the wood frog (Lithobates sylvatica)—to large. True frog_sentence_5

Many of the true frogs are aquatic or live close to water. True frog_sentence_6

Most species lay their eggs in the water and go through a tadpole stage. True frog_sentence_7

However, as with most families of frogs, there is large variation of habitat within the family. True frog_sentence_8

There are also arboreal species of true frogs, and the family includes some of the very few amphibians that can live in brackish water. True frog_sentence_9

Systematics True frog_section_0

The subdivisions of the Ranidae are still a matter of dispute, although most are coming to an agreement. True frog_sentence_10

Several former subfamilies are now recognised as separate families (Petropedetidae, Cacosterninae, Mantellidae, and Dicroglossidae). True frog_sentence_11

The genus Rana has now been split up and is much reduced in size. True frog_sentence_12

While too little of the vast diversity of true frogs has been subject to recent studies to say something definite, as of mid-2008, studies are going on, and several lineages are recognizable. True frog_sentence_13

True frog_unordered_list_0

Genera True frog_section_1

Most of the subfamilies formerly included under Ranidae are now treated as separate families, leaving only Raninae remaining. True frog_sentence_14

The following genera are recognised in the family Ranidae: True frog_sentence_15

Incertae sedis True frog_section_2

A number of taxa are placed in Ranidae incertae sedis, that is, their taxonomic status is too uncertain to allow more specific placement. True frog_sentence_16

True frog_unordered_list_1

Credits to the contents of this page go to the authors of the corresponding Wikipedia page: frog.