A recent letter in Nature:
Members of the Consortium of European Taxonomic Facilities have adopted a consistent citation system for an estimated 20 million biological and geological specimens from European collections. We encourage researchers, publishers and other institutions to engage with this initiative by citing the full specimen identifier in their publications and data sets. These specimens provide reference material for research on evolution, genetics, mineralogy, ecology and taxonomy — hence the need for a reliable identification system for citation (see A. Güntsch et al. Database 1, bax003; 2017). Our system assigns a unique and permanent Uniform Resource Identifier (URI) to each specimen. It follows Linked Open Data principles (see www.w3.org/tr/ld-bp) by including a redirection facility to human- and machine readable representations of the specimen. It also gives credit to the collectors and custodians. For example, the alpine plant specimen Leptinella scariosa Cass., held by the Royal Botanic Garden in Edinburgh, UK, and collected in Chile by Charles Darwin in 1834, is referred to by the URI http://data.rbge.org.uk/ herb/E00070244.
Quentin Groom, Botanic Garden Meise, Belgium.
Roger Hyam, Royal Botanic Garden Edinburgh, UK.
Anton Güntsch, Botanic Garden and Botanical Museum, Berlin, Germany.
Genebanks are doing something very similar.