{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,3]],"date-time":"2026-10-03T03:19:16Z","timestamp":1790997556824,"version":"4.1.0"},"reference-count":330,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2026,2,13]],"date-time":"2026-02-13T00:00:00Z","timestamp":1770940800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pathogens"],"abstract":"<jats:p>Throughout history, species within the genus Entamoeba have been described using criteria that were not always applied consistently, resulting in an often confusing and controversial taxonomy. Several factors contributed to this situation, including the limited number of morphological characters available for taxonomic studies, overlapping host ranges, mixed infections, and a cosmopolitan distribution associated with human and animal movements. The incorporation of genetic data as diagnostic and differential criteria during the second half of the twentieth century enabled the recognition of cryptic species and the proposal of new taxa; however, significant taxonomic issues remain unresolved. This review summarizes the historical development and major controversies in the taxonomy of Entamoeba, from its origins in the late nineteenth century, when morphology and host association were the available criteria, to the present day, in which molecular approaches provide a more realistic view of species diversity and interspecific relationships. Based on this analysis, general principles are proposed as a pragmatic synthesis to guide future taxonomic work on Entamoeba, emphasising lineage-based species delimitation, the central role of molecular evidence when diagnostic morphology is lacking, the contextual value of host data, and the need for nomenclatural decisions grounded in biological evidence and historical rigour.<\/jats:p>","DOI":"10.3390\/pathogens15020213","type":"journal-article","created":{"date-parts":[[2026,2,13]],"date-time":"2026-02-13T16:09:32Z","timestamp":1770998972000},"page":"213","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["The Taxonomy of the Genus Entamoeba (Archamoebea: Endamoebidae): A Historical and Nomenclatural Review"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-6671-5603","authenticated-orcid":false,"given":"Lorena","family":"Esteban-S\u00e1nchez","sequence":"first","affiliation":[{"name":"Department of Microbiology and Parasitology, Faculty of Pharmacy, Complutense University, Plaza Ram\u00f3n y Cajal s\/n, 28040 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rafael Alberto","family":"Mart\u00ednez-D\u00edaz","sequence":"additional","affiliation":[{"name":"Department of Preventive Medicine and Public Health and Microbiology, Faculty of Medicine, Autonomous University, C\/Arzobispo Morcillo s\/n, 28029 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9034-8606","authenticated-orcid":false,"given":"Francisco","family":"Ponce-Gordo","sequence":"additional","affiliation":[{"name":"Department of Microbiology and Parasitology, Faculty of Pharmacy, Complutense University, Plaza Ram\u00f3n y Cajal s\/n, 28040 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,2,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"214","DOI":"10.1126\/science.152.3719.214","article-title":"Nature of the packing of ribosomes within chromatoid bodies","volume":"152","author":"Morgan","year":"1966","journal-title":"Science"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"670","DOI":"10.1126\/science.162.3854.670","article-title":"Structure of ribosomes of chromatoid bodies. 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