The name DILLEN is taken from the late 1700s early 1800s century German botanist Johann Jacob Dillen (Latinized Dillenius) heralded by most as the father of cryptogamic botany. Dillenius left his home in Giessen, Germany to become the Sherardian Professor of Botany at Oxford University. One of the first Fossombronioid species written upon in modern times was described and illustrated by him (our logo) in his 1741 publication 'Historia Muscorum.' That species was subsequently recognized and given the name Jungermannia pusilla by Linnaeus (1753) in his publication 'Species Plantarum,' which is the nomenclatural starting point for all names in our study. Starting point refers to the earliest published account in which names for plants are considered valid in accordance with the ICBN(St. Louis 2000). DILLEN currently consists of 22 separate databases in FileMaker Pro 5.0 for Macintosh. The host system is a Macintosh G4-400 server with server system 9.0. This system allows the Web user to retrieve information on extant Fossombronioid specimens, literature, and taxon (species) names within our database system. The relational database system was developed by Bob Pollok (undergraduate; computer science) and James Bray (graduate student on Fossombroniineae PEET grant) from templates graciously provided by the stiletto fly (Therevidae) PEET project at the University of Illinois/Illinois Natural History Survey (Developer, Gail Kampmeier; PI, Michael Irwin). More information on the underlying design can be found at their database web site MANDALA. Development of DILLEN was funded by the NSF- PEET program (DEB 9521883). Names or links to commercial products are for informational purposes only and do not constitute endorsement in any form. DILLEN is a dynamic research tool with data being added continuously. Therefore, data contained herein may or may not have been cross-checked. Please feel free to inform Raymond Stotler firstname.lastname@example.org if problems are encountered. These searchable data include a multitude of information compiled from the specimens examined and the literature consulted throughout our study. The web user has the ability to link taxonomic names with type specimen information, specimen location (e.g. institution), geographic locality,collector(s), illustrations, synonyms, and relevant literature.