Deposit of a Proposed Type Strain

Excerpt from: Int J System Evol Microbiol, Information for Authors:

1.1.1 General
"It is a requirement of IJSEM and the ICSP that authors of new names and new combinations provide evidence that types are deposited in two recognized culture collections in two different countries (i.e. documents certifying deposition and availability of type strains). Papers will not be accepted until such documentation has been received by the Editor."

"3.1.1 Type strains
All type strains must be indicated at each occurrence in the text, tables and figures by a superscript capital T (e.g. ATCC 13546T =IJSM 0819T). The Code requires the designation of a type strain for a new species and recommends the deposition of a culture, the type strain. Type strains must be deposited in at least two or more public culture collections from two or more countries and accession numbers must be provided. An extensive listing of culture collections is available online at


Further reading:

  • Parker, C.T., Tindall, B.J., and Garrity, G.M. (2019) International Code of Nomenclature of Prokaryotes. Int J Syst Evol Microbiol 69: S1-S111.
  • Tindall B. J.. (2019) Clarification of access regulations to genetic resources that are subject to the sovereign rights of sovereign states and the deposit of nomenclatural types under the International Code of Nomenclature of Prokaryotes. Int J System Evol Microbiol 69, 2599-2601.
  • B. J. Tindall, R. Rosselló-Móra, Busse, H.-J., Ludwig, W. & Kämpfer, P. (2010). Notes on the characterization of prokaryote strains for taxonomic purposes. Int J Syst Evol Microbiol 60, 249-266.
  • Tindall B.J., Garrity, G.M. (2008) Proposals to clarify how type strains are deposited and made available to the scientific community for the purpose of systematic research. Int J System Evol Microbiol 58, 1987-1990.
  • Tindall, B. J., Kämpfer, P., Euzéby, J. P. & Oren, A. (2006). Valid publication of names of prokaryotes according to the rules of nomenclature: past history and current practice. Int J System Evol Microbiol 56, 2715-2720.
  • Euzéby, J. P. Minimal standards fort he description of new taxa:
  • International Journal of Systematic and Evolutionary Microbiology, Information for Authors