Name: Actinoplanes capillaceus Matsumoto et al. 2001

Category: Species

Proposed as: sp. nov.

Etymology: ca.pil.la’ce.us. L. masc. adj. capillaceus, of capillary, referring to the hairy surface of the spore vesicle

Pronunciation, gender: ka-pil-LA-ke-us, masculine

Type strain: DSM 44859; IFO 16408; JCM 10268; K95-5561; NBRC 16408

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB013495 Analyse FASTA

Effective publication: Matsumoto A, Takahashi Y, Kudo T, Seino A, Iwai Y, Omura S. Actinoplanes capillaceus sp. nov., a new species of the genus Actinoplanes. Antonie Van Leeuwenhoek 2000; 78:107-115.

IJSEM list: Anonymous. Validation list no. 80. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2001; 51:793-794.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Actinoplanes campanulatus (Couch 1963) Stackebrandt and Kroppenstedt 1988

Risk group: 1

• Synonyms:

  • Name	Kind
    "Ampullaria campanulata" Couch 1963	heterotypic synonym, not validly published, basonym of name in Approved Lists
    Ampullariella campanulata (Couch 1963) Couch 1964 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP
    Actinoplanes campanulatus (Couch 1963) Stackebrandt and Kroppenstedt 1988	heterotypic synonym, validly published under the ICNP

• Notes:
  • ⏲ According to Mo et al. (2025), this species is a later heterotypic synonym of "Ampullaria campanulata" Couch 1963. Publication: Mo P, Ming Y, Cao Y, Li K, Zou W, Wang Y, Li B. Proposal of Actinoplanes capillaceus Matsumoto et al. 2000 as a later heterotypic synonym of Actinoplanes campanulatus (Couch 1963) Stackebrandt and Kroppenstedt 1987 and an emended description of Actinoplanes campanulatus. Int J Syst Evol Microbiol 2025; 75:6744.
  • ⏲ According to Mo et al. (2025), this species is a later heterotypic synonym of Actinoplanes campanulatus (Couch 1963) Stackebrandt and Kroppenstedt 1988. Publication: Mo P, Ming Y, Cao Y, Li K, Zou W, Wang Y, Li B. Proposal of Actinoplanes capillaceus Matsumoto et al. 2000 as a later heterotypic synonym of Actinoplanes campanulatus (Couch 1963) Stackebrandt and Kroppenstedt 1987 and an emended description of Actinoplanes campanulatus. Int J Syst Evol Microbiol 2025; 75:6744.
  • ⏲ According to Mo et al. (2025), this species is a later heterotypic synonym of Ampullariella campanulata (Couch 1963) Couch 1964 (Approved Lists 1980). Publication: Mo P, Ming Y, Cao Y, Li K, Zou W, Wang Y, Li B. Proposal of Actinoplanes capillaceus Matsumoto et al. 2000 as a later heterotypic synonym of Actinoplanes campanulatus (Couch 1963) Stackebrandt and Kroppenstedt 1987 and an emended description of Actinoplanes campanulatus. Int J Syst Evol Microbiol 2025; 75:6744.
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 75, part 4 of the IJSEM. Int J Syst Evol Microbiol 2025; 75:6792.
  • ❗ Actinoplanes capillaceus is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Actinoplanes.
  • 😷 The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1. — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
  • 🎓 Name mentioned 7 times in PubMed until 2025-06-04.
  • 🧍 According to Rules 27(3) and 30, this name is not validly published, because the original publication makes reference to the deposit of the type strain in a single recognized culture collection. However, according to the Judicial Opinion 81, Actinoplanes capillaceus Matsumoto et al. 2001 is considered to be validly published, since deposit in a second culture collection in a different country has been documented. Publication: Euzeby JP, Tindall BJ. Status of strains that contravene Rules 27(3) and 30 of the Bacteriological Code. Request for an opinion. Int J Syst Evol Microbiol 2004; 54:293-301.
  • 🧍 The invalidly proposed species "Ampullariella cylindrica" Jiang and Ruan 1982, "Ampullariella pekinensis" Juan and Zhang 1974 and "Ampullariella pilifera" Jiang and Ruan 1982 are assigned to Actinoplanes capillaceus on the basis of genotypic and phenotypic data. Publication: Matsumoto A, Takahashi Y, Kudo T, Seino A, Iwai Y, Omura S. Actinoplanes capillaceus sp. nov., a new species of the genus Actinoplanes. Antonie Van Leeuwenhoek 2000; 78:107-115.

Parent taxon: Actinoplanes Couch 1950 (Approved Lists 1980)

Assigned by: Matsumoto A, Takahashi Y, Kudo T, Seino A, Iwai Y, Omura S. Actinoplanes capillaceus sp. nov., a new species of the genus Actinoplanes. Antonie Van Leeuwenhoek 2000; 78:107-115.

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Record number: 772823