Poecilia butleri
species of live-bearing toothcarps
Poecilia butleri, the Pacific molly, is a species of poeciliid fish native to the estuaries, lagoons, bays, and slow flowing fresh waters of the Pacific slope of Mexico and El Salvador. It belongs to the shortfin molly species complex. Pacific mollies feed mainly on cyanobacteria and detritus.
Taxonomy and description
Poecilia butleri was originally described in 1889 by Jordan, who named it after his friend, the naturalist Amos Butler. Rosen and Bailey reduced it to a synonym of P. sphenops. Schultz and Miller disagreed and in 1971 restored P. butleri to species rank on the grounds of partial reproductive and geographic isolation. P. butleri belongs to the Mollienesia subgenus and P. sphenops (shortfin molly) species complex. The two species often occur together in nature. They easily hybridize in the laboratory to produce fertile offspring, but only one such hybrid has been recorded in the drainage of the Papagayo River, where the two mollies live together. This paucity points to reproductive barriers that have not yet been identified.
“Poecilia butleri” enters the record as species of live-bearing toothcarps. Crown Archives preserves that source wording while asking what Poecilia, butleri and species can confirm, complicate or overturn.
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“Poecilia butleri” is worth following because a concise public description often conceals a longer documentary argument. Here, Poecilia, butleri and species provides the most credible route into that argument.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Jul 30, 2026. The linked authority identifier is Q3753985. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1889 and 1971.
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This entry incorporates text from “Poecilia butleri” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.