Union Catalogue

About Us


The Linnaeus Link Union Catalogue (LLUC) Project


We hope that you will enjoy using the new LLUC.


For Search Tips and FAQs, please go to the HELP pages.

Join Us! If your institution or collection has significant Linnaean holdings, raise your profile by becoming a partner.



The Linnaeus Link Project is an international collaboration between libraries with significant holdings of Linnaean material. It is funded, maintained and co-ordinated by the Linnean Society of London.  Its main aim is to be a comprehensive, online Union Catalogue of Linnaean publications, facilitating research for scholars worldwide by enabling them to identify locations of titles with a single internet search.

It also acts as the official bibliography of works by and relating to Linnaeus and his legacy by using and continuing the bibliographic work of Basil Soulsby.



Since the inaugural meeting in 1999, many important institutions have committed to moving the project forward and the current list of partners is as follows:


In 2004, The Linnean Society of London funded a three-year project to catalogue the extensive Linnaean collection at the Natural History Museum, with the Museum providing staff support and facilities.


The new LLUC

The Linnean Society funded the software development of the initial LLUC. This commitment is ongoing. In 2011-2012, the system was completely redesigned to reflect changing technologies and user expectations. The new system built by the IT company 67 Bricks has much improved navigation, search- and display functions.

An outstanding feature is the new system's ability to cope with a wide range of international cataloguing systems and special characters, in line with the project's international foundations. It is also a powerful tool for bibliographic research: Instead of amalgamating all individual partners' records for one title into one artificial, "ideal", record, the system uses a unique Tab display to unveil the full bibliographic information present in each individual record. This is especially relevant for copy-specific information and provenance research.


Read more about:

Joining as a new Partner & list of Partners

Soulsby's bibliography and Soulsby numbers

Collections of Linnaean materials world-wide

The project and its history

Carl Linnaeus and the Linnaean legacy