Welcome to SILVA

A comprehensive online resource for quality checked and aligned ribosomal RNA sequence data.

SILVA provides comprehensive, quality checked and regularly updated datasets of aligned small (16S/18S, SSU) and large subunit (23S/28S, LSU) ribosomal RNA (rRNA) sequences for all three domains of life (Bacteria, Archaea and Eukarya).

For background information click here.

SILVA SSU 144 release / LSU 138.2 release

 

SSU Parc

SSU Ref NR 99

LSU Parc

LSU Ref NR 99

Version

144

144

138.2

138.2

Minimum bases

300

1,200/900

300

1,900

Quality filtering

basic

strong

basic

strong

Guide Tree

no

yes

no

yes

Release date

14.08.26

14.08.26

11.07.24

11.07.24

Aligned rRNA sequences

15,439,037

905,628

1,312,521

95,279

After overcoming a number of unforeseen challenges during the preparation process, we are pleased to announce the release of the SILVA SSU 144 dataset. Working with a new team of curators, we have completely redesigned the curation workflow, in order to establish a more robust and sustainable process for future releases.

In order to guarantee a release this year, we have not yet applied this new curation workflow to the eukaryotic dataset. For the first version of this release, we have focused…

Read more

Survey on high-level taxonomy

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New publication - SILVA in 2026: a global core biodata resource for rRNA within the DSMZ digital diversity

Affiliations and collaborations

ARB

The software package ARB represents a graphically-oriented, fully-integrated package of cooperating software tools for handling and analysis of sequence information. We use ARB for curation and make our datasets avaliable in ARB format, among others.

DSMZ Digital Diversity

The Leibniz Institute DSMZ establishes an integrated suite of scientific databases of fundamental relevance for the life sciences. The databases include BRENDA, SILVA, LPSN, BacDive and TYGS which are developed in a highly coordinated manner. The resulting data platform DSMZ Digital Diversity will provide an integrated resource and will allow to link and comprehensively analyse the different types of scientific data from all domains of life sciences.

German Network for Bioinformatics Infrastructure

SILVA is part of the German Network for Bioinformatics Infrastructure de.NBI. Help us to improve SILVA and the network by rating our service in the de.NBI survey.

LPSN TaxMap

The List of Prokaryotic names with Standing in Nomenclature (LPSN) is used during curation of the SILVA taxonomy. SILVA adopted the EukMap application as TaxMap to provide a visual version of LPSN’s taxonomic opinion based on validly published and correct names according to the rules of ICNP. It facilitates the navigation of the prokaryotic taxonomy derived from LPSN's taxonomic perspective. 

RNAcentral

RNAcentral is a free, public resource that offers integrated access to a comprehensive and up-to-date set of non-coding RNA sequences provided by a collaborating group of Expert Databases representing a broad range of organisms and RNA types. SILVA is one of the Expert Databases in the consortium.

UniEuk

The SILVA team developed the taxonomic curation platform EukMap as part of the UniEuk project, and continues to maintain it. The UniEuk taxonomy for eukaryotes, which focuses primarily on protists is used as a basis for protists in the SILVA taxonomy.