Search tool	Example of search string in box	What that means to the database
* = "wildcard". Allows a partial letter string to be entered and implies either no or various extension on this letter string	Hyl*	Will find all uses of "Hyl . . ." anywhere in a record: e.g., Hylarana, Hyla, Hylidae, Hylinae, Hylaedactyla.
* = "wildcard". Allows a partial letter string to be entered and implies either no or various extension on this letter string	*Hyla	Will find all uses of ". . . hyla" anywhere in a record: e.g., Hyla, Hylidae, Plectrohyla, Ptychadena hylaea, Adenomera hylaedactyla
	Hyla	Will find all records that contain stand-alone uses of Hyla: e.g., Hyla, Hyla arenicolor
Strings of words without quotation marks	Lithobates pipiens	Interprets this as "Lithobates OR pipiens" so will find the union of all records that contain either "Lithobates" or "pipiens": e.g., Lithobates omiltemanus, Hylorana pipiens
Strings of word with quotation marks	"Lithobates pipiens"	Interprets this as "Lithobates AND pipiens" so will return all records that have the character string "Lithobates pipiens" anywhere within a record: e.g., all members of the Lithobates pipiens complex.
AND statement. Means that the results of the search must include both words held together by an AND	Lithobates AND pipiens	Same as "Lithobates pipiens"
OR statement. Means that the results of the search will all records that have either of the terms held together by an OR	Lithobates OR "Costa Rica"	Recovers all records that contain the word "Lithobates" or "Costa Rica": 402 records inasmuch as this will include all records for the entire amphibian fauna of Costa Rica
Combining Boolean operators within the Basic Search box (AND, OR, NOT, quotation marks)	Lithobates AND "Costa Rica" NOT forreri	Recovers only records that contain the word Lithobates AND "Costa Rica", but excludes any record that contains the word "forreri" in any part of the record: 9 records
Printable HELP file

Search tool	Example of search string in box	What that means to the database
* = "wildcard". Allows a partial letter string to be entered and implies either no or various extension on this letter string	Hyl*	Will find all uses of "Hyl . . ." anywhere in a record: e.g., Hylarana, Hyla, Hylidae, Hylinae, Hylaedactyla.
* = "wildcard". Allows a partial letter string to be entered and implies either no or various extension on this letter string	*Hyla	Will find all uses of ". . . hyla" anywhere in a record: e.g., Hyla, Hylidae, Plectrohyla, Ptychadena hylaea, Adenomera hylaedactyla
Single word	Hyla	Will find all records that contain stand-alone uses of Hyla: e.g., Hyla, Hyla arenicolor
Strings of words without quotation marks	Lithobates pipiens	Interprets this as "Lithobates OR pipiens" so will find the union of all records that contain either "Lithobates" or "pipiens": e.g., Lithobates omiltemanus, Hylorana pipiens
Strings of word with quotation marks	"Lithobates pipiens"	Interprets this as "Lithobates AND pipiens" so will return all records that have the character string "Lithobates pipiens" anywhere within a record: e.g., all members of the Lithobates pipiens complex.
AND statement. Means that the results of the search must include both words held together by an AND	Lithobates AND pipiens	Same as "Lithobates pipiens"
OR statement. Means that the results of the search will all records that have either of the terms held together by an OR	Lithobates OR "Costa Rica"	Recovers all records that contain the word "Lithobates" or "Costa Rica": 402 records inasmuch as this will include all records for the entire amphibian fauna of Costa Rica
Combining Boolean operators within the Basic Search box (AND, OR, NOT, quotation marks)	Lithobates AND "Costa Rica" NOT forreri	Recovers only records that contain the word Lithobates AND "Costa Rica", but excludes any record that contains the word "forreri" in any part of the record: 9 records
Printable HELP file

Lithobates zweifeli (Hillis, Frost, and Webb, 1984)

Class: Amphibia > Order: Anura > Family: Ranidae > Genus: Lithobates > Species: Lithobates zweifeli

Rana zweifeli Hillis, Frost, and Webb, 1984, Copeia, 1984: 399. Holotype: KU 192466, by original designation. Type locality: "12 km E (by road) of Teloloapan, Guerrero, Mexico".

Rana (Rana) zweifeli — Dubois, 1987 "1986", Alytes, 5: 41, by implication.

Rana (Zweifelia) zweifeli — Dubois, 1992, Bull. Mens. Soc. Linn. Lyon, 61: 331; Hillis, 2007, Mol. Phylogenet. Evol., 42: 335–336, by implication; Yuan, Zhou, Chen, Poyarkov, Chen, Jang-Liaw, Chou, Matzke, Iizuka, Min, Kuzmin, Zhang, Cannatella, Hillis, and Che, 2016, Syst. Biol., 65: 835.

Rana (Novirana, Sierrana, Torrentirana, Zweifelia) zweifeli — Hillis and Wilcox, 2005, Mol. Phylogenet. Evol., 34: 305. See Dubois, 2006, Mol. Phylogenet. Evol., 42: 317–330, Hillis, 2007, Mol. Phylogenet. Evol., 42: 331–338, and Dubois, 2007, Cladistics, 23: 390–402, for relevant discussion of nomenclature. Invalid name formulation under the International Code of Zoological Nomenclature (1999) as discussed by Dubois, 2007, Cladistics, 23: 395.

Lithobates zweifeli — Frost, Grant, Faivovich, Bain, Haas, Haddad, de Sá, Channing, Wilkinson, Donnellan, Raxworthy, Campbell, Blotto, Moler, Drewes, Nussbaum, Lynch, Green, and Wheeler, 2006, Bull. Am. Mus. Nat. Hist., 297: 369; Che, Pang, Zhao, Wu, Zhao, and Zhang, 2007, Mol. Phylogenet. Evol., 43: 1–13; by implication.

Lithobates (Lithobates) zweifeli — Dubois, 2006, C. R. Biol., Paris, 329: 830; Dubois, 2006, Mol. Phylogenet. Evol., 42: 325.

English Names

Zweifel's Frog (Liner, 1994, Herpetol. Circ., 23: 28; Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 110; Liner and Casas-Andreu, 2008, Herpetol. Circ., 38: 17).

Distribution

Confined primarily to the Balsas Depression of southern Mexico in the states of Morelos, Guerrero, Michoacán, Morelos, Puebla, and México, but extends eastward into Oaxaca and northwestern into Jalisco and Colima.

Comment

In the Rana tarahumarae group of Hillis, Frost, and Webb, 1984, Copeia, 1984: 398–403, Rana pustulosa group of Dubois, 1987 "1986", Alytes, 5: 42, and equivalent subgenus Zweifelia of Dubois, 1992, Bull. Mens. Soc. Linn. Lyon, 61: 331. This species had been mistakenly referred to as Rana pustulosa in most literature. See comment under Rana pustulosa. See account by Webb, 2001, Mesoam. Herpetol.: 31–35 (who noted very confusing variation in this species as related to Rana psilonota and Rana pustulosa). Chávez-Juárez, Alcaraz-Cruz, and Valenzuela Galván, 2004, Herpetol. Rev., 35: 185, provided the Morelos, Mexico, record.

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For additional information see AmphibiaWeb report
For information on conservation status and distribution see the IUCN Redlist
For related information on conservation and images as well as observation see iNaturalist
For access to available specimen data for this species, from over 350 scientific collections, go to Vertnet.