SeqCode Registry
Register List https://seqco.de/r:ylrisak3 [2025]

Neomicrothrix parvicella gen. nov. sp. nov.

Submitted by Nielsen, Per H.

Genus Neomicrothrix

Etymology
[Ne.o.mi.cro'thrix] Gr. masc. adj. neos, new; Gr. masc. adj. mikros, small; Gr. fem. n. thrix, a hair; N.L. fem. n. Neomicrothrix, a new small hair
Nomenclatural type
Species Neomicrothrix parvicellaTs
Description
Filamentous bacterium frequently encountered in wastewater treatment processes, known for its significance in the bulking phenomenon of sludge. 
Classification
Bacteria » Actinomycetota » Acidimicrobiia » Acidimicrobiales » “Neomicrotrichaceae” » Neomicrothrix
References
Effective publication: Muller et al., 2012 [1]
Original (not valid) publication: van Veen, 1973 [2] and Blackall et al., 1995 [3]
Corrigendum: Oren, 2017 [4] (from “Microthrix”)
Registry URL
https://seqco.de/i:16

Species Neomicrothrix parvicellaTs

Etymology
[par.vi.ce'lla] L. masc. adj. parvus, small; L. fem. n. cella, a store-room and, in biology, a cell; N.L. fem. n. parvicella, a small cell
Nomenclatural type
NCBI Assembly: GCF_000299415.1 Ts
Description
Blackall et al., 1995: "... Gram-positive, straight filamentous bacterium [...] a deep branching member of the actinomycetes
subphylum. It is most closely related to the iron-oxidising strain TH3, members of the order Actinomycetales and to the genus Atopobium"

Blackall et al., 1996: "... a filamentous bacterium that grows with great difficulty in cultures from the mixed liquor of activated sludge sewage treatment plants. It is gram positive, and the ultrastructure of its cell walls has been determined to be of the gram-positive type by electron microscopical examination. Phylogenetically, it is a deep-branching member of the subphylum actinomycetes within the gram-positive phylum of the domain Bacteria. As for phenotypic features, it is known that the organism contains polyphosphate inclusions and that it is catalase positive. In mixed cultures in activated sludge plants and in pure culture in the laboratory, it has a characteristic and distinctive winding filamentous morphology, with filaments hundreds of micrometers long."

Oren, 2017: Suggested renaming Microthrix parvicella to Neomicrothrix parvicella.
Classification
Bacteria » Actinomycetota » Acidimicrobiia » Acidimicrobiales » “Neomicrotrichaceae” » Neomicrothrix » Neomicrothrix parvicellaTs
References
Effective publication: Muller et al., 2012 [1]
Original (not valid) publication: van Veen, 1973 [2] and Blackall et al., 1995 [3]
Corrigendum: Oren, 2017 [4] (from “Microthrix parvicella”)
Assigned taxonomically: van Veen, 1973 [2]
Registry URL
https://seqco.de/i:60

References

  1. Muller et al. (2012). Genome Sequence of “Candidatus Microthrix parvicella” Bio17-1, a Long-Chain-Fatty-Acid-Accumulating Filamentous Actinobacterium from a Biological Wastewater Treatment Plant. Journal of Bacteriology. DOI:10.1128/jb.01765-12
  2. van Veen (1973). Bacteriology of activated sludge, in particular the filamentous bacteria. Antonie van Leeuwenhoek. DOI:10.1007/bf02578852
  3. Blackall et al. (1995). “Microthrix parvicella” is a Novel, Deep Branching Member of the Actinomycetes Subphylum. Systematic and Applied Microbiology. DOI:10.1016/s0723-2020(11)80070-6
  4. Oren (2017). A plea for linguistic accuracy – also for Candidatus taxa. International Journal of Systematic and Evolutionary Microbiology. DOI:10.1099/ijsem.0.001715

Register List Certificate of Validation

On behalf of the Committee on the Systematics of Prokaryotes Described from Sequence Data (SeqCode Committee), we hereby certify that the Register List seqco.de/r:ylrisak3 submitted by Nielsen, Per H. and including 2 new names has been successfully validated.


Date of Priority: 2025-10-29 12:42 UTC
DOI: 10.57973/seqcode.r:ylrisak3