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

Elachistocleis magna Toledo, 2010

Class: Amphibia > Order: Anura > Family: Microhylidae > Subfamily: Gastrophryninae > Genus: Elachistocleis > Species: Elachistocleis magna

Elachistocleis magnus Toledo, 2010, Zootaxa, 2496: 64. Holotype: ZUEC 11384, by original designation. Type locality: Fazenda Jaburi, in the municipality of Espigão do Oeste, (11° 35′ - 11° 38′ S, 60° 41′ - 60° 45′ W; 280 m a.s.l.) . . . , state of Rondônia, Brazil".

Elachistocleis carvalhoi Caramaschi, 2010, Bol. Mus. Nac., Rio de Janeiro, N.S., Zool., 527: 12. Holotype: MNRJ 51384, by original designation. Type locality: "BRAZIL: TOCANTINS: Aragominas (07° 10′ S, 48° 32′ W; 345m altitude)". Synonymy by Novaes-e-Fagundes, Lyra, Loredam, Carvalho, Haddad, Rodrigues, Baldo, Barrasso, Loebmann, Ávila, Brusquetti, Prudente, Wheeler, Orrico, and Peloso, 2023, Zool. J. Linn. Soc., 197: 558.

Elachistocleis bumbameuboi Caramaschi, 2010, Bol. Mus. Nac., Rio de Janeiro, N.S., Zool., 527: 16. Holotype: MNRJ 53200, by original designation. Type locality: "BRAZIL: MARANHÃO: São Luís (02° 32′ S, 44° 18′ W; 24 m altitude), UHE Ponta da Madeira". Synonymy by Novaes-e-Fagundes, Lyra, Loredam, Carvalho, Haddad, Rodrigues, Baldo, Barrasso, Loebmann, Ávila, Brusquetti, Prudente, Wheeler, Orrico, and Peloso, 2023, Zool. J. Linn. Soc., 197: 558.

Elachistocleis magna — Marinho, Carvalho, Bang, Teixeira, Azarak, Costa-Campos, and Giaretta, 2018, Zootaxa, 4521: 361. Gender correction.

Engystoma magnum — Dubois, Ohler, and Pyron, 2021, Megataxa, 5: 216.

Engystoma bumbameuboi — Dubois, Ohler, and Pyron, 2021, Megataxa, 5: 216.

Engystoma carvalhoi — Dubois, Ohler, and Pyron, 2021, Megataxa, 5: 216.

Common Names

None noted.

Distribution

Rondônia, southern Amazonas, and the western two-thirds of Mato Grosso, northern and western Tocantins to eastern Pará, and Maranhão, Brazil; presumably to be found in adjacent northeastern Bolivia.

Geographic Occurrence

Natural Resident: Brazil

Endemic: Brazil

Comment

Confused with Elachistocleis ovalis prior to its naming according to the original publication. Strüssmann, Campos, Dorado-Rodrigues, Almeida, Toledo, Hoogmoed, and Valadão, 2012, Check List, 8: 317-320, provided a geographic range map and discussed the range. Meneghelli and Calderon, 2017 "2016", Herpetol. Rev., 47: 622, provided a record from Porto Velho, Rondônia, Brazil. See Marinho, Carvalho, Bang, Teixeira, Azarak, Costa-Campos, and Giaretta, 2018, Zootaxa, 4521: 357–375, for discussion (as Elachistocleis carvalhoi and Elachistocleis magna) of advertisement calls, intraspecific variation, and diagnosis. Jowers, Othman, Borzée, Rivas-Fuenmayor, Sánchez-Ramírez, Auguste, Downie, Read, and Murphy, 2021, Organisms Divers. Evol., 21: 189–206, discussed the phylogenetics and biogeography of this species. In the Elachistocleis surinamensis group of Novaes-e-Fagundes, Lyra, Loredam, Carvalho, Haddad, Rodrigues, Baldo, Barrasso, Loebmann, Ávila, Brusquetti, Prudente, Wheeler, Orrico, and Peloso, 2023, Zool. J. Linn. Soc., 197: 545–568, who provided a dot map. Fadel, Silva, Rodrigues, Brandão, Santana, and Mângia, 2025 , Zootaxa, 5618: 19, reported the species from Caseara municipality, Tocantíns, Brazil, commented on the literature, and described the advertisement call.

External links:

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To search the NIH genetic sequence database, see GenBank
For additional information see AmphibiaWeb report
For information on conservation status and distribution see the IUCN Redlist
For information on distribution, habitat, and conservation see the Map of Life
For related information on conservation and images as well as observations see iNaturalist