Urceolus
genus of algae
Urceolus (from Latin urceolus 'flask', 'pitcher') is a genus of heterotrophic flagellates belonging to the Euglenozoa, a phylum of single-celled eukaryotes or protists. Described by Russian biologist Konstantin Mereschkowsky in 1877, its type species is Urceolus alenizini. Species of this genus are characterized by deformable flask-shaped cells that exhibit at least one flagellum that is active at the tip, arising from a neck-like structure that also hosts the feeding apparatus. They are found in a variety of water body sediments across the globe. According to evolutionary studies, Urceolus belongs to a group of Euglenozoa known as peranemids, closely related to the euglenophyte algae.
Description
Urceolus species are single-celled eukaryotes or protists. Their cells are sack-shaped, narrow at the anterior end and expanded at the posterior end. The cells exhibit flexibility and squirming movements, more vigorous in some species. Like other phagotrophic protists, they present an organelle for ingestion known as a 'feeding apparatus', an arrangement of microtubules beneath a concave portion of the cell membrane used for ingesting prey through phagocytosis. Their cell body is deformable, but can be distinguished from other euglenids by a flared collar or 'neck' in the anterior region, which hosts a canal where the feeding apparatus and the flagellum are located.
This brief starts where responsible research should: with the source description of “Urceolus” as genus of algae. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the science & nature register because the source frames it as genus of algae. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Dec 28, 2025. The linked authority identifier is Q2673429. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1877.
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This entry incorporates text from “Urceolus” 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.