 Other notable workers that described and figured trigoniids include Friedrich August von Quenstedt, Alcide d'Orbigny and Georg August Goldfuss.The major worker on the Trigoniidae in the nineteenth century was John Lycett, a physician from Gloucestershire who published a text entitled "A Monograph of British Fossil Trigoniae".Work on the Trigoniidae has generally been sparse in the 20th century and has mainly concentrated upon the development towards a workable taxonomy.