Roseospirillum parvum
species of Alphaproteobacteria

Roseospirillum parvum is a phototrophic, nonsulfur, anaerobic and motile bacterium species from the genus of Roseospirillum with a bipolar flagella which has been isolated from the Sippewissett Salt Marsh in Cape Cod in Massachusetts in the United States.
References
Further reading
Glaeser, J; Overmann, J (1998). "Selective enrichment and characterization of Roseospirillum parvum, gen. nov. and sp. nov., a new purple nonsulfur bacterium with unusual light absorption properties". Archives of Microbiology. 171 (6): 405–16. doi:10.1007/s002030050727. PMID 10369896.
Begin with the source’s own compact description: “Roseospirillum parvum” is species of Alphaproteobacteria. The dossier treats that line as a proposition to test through Roseospirillum, parvum and species, not as a finished interpretation.
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The phrase “species of Alphaproteobacteria” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Jun 15, 2026. The linked authority identifier is Q26282430. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1998 and 1007.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Roseospirillum parvum” 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.