Fig. 2 in The entomofauna of the Lower Permian fossil insect beds of Kansas and Oklahoma, USA

Fig. 2. (A) Elias H. Sellards (1875–1961) discovered the Elmo fossil beds (photo courtesy of the Texas Memorial Museum); (B) Robin J. Tillyard (1881–1937) studied Elmo fossils for a period of 16 years, carrying out his research in New Zealand and Australia. Eventually all the fossil specimens he worked with were returned to the Yale Peabody Museum (photo courtesy of the late Faith Tillyard Evans, Tillyard's daughter); (C) Frank M. Carpenter (1902–1994), of the Harvard Museum of Comparative Zoology and the dean of American palaeoentomologists, published definitive studies of the Elmo specimens over a period of some 60 years (photo courtesy of George Byers, University of Kansas).