Larval Psephenidae (Coleoptera: Byrrhoidea) of Thailand: Annotated List and Illustrated Key to Genera Author Shepard, William D. Author Sites, Robert W. text The Coleopterists Bulletin 2019 2019-06-21 73 2 259 282 http://dx.doi.org/10.1649/0010-065x-73.2.259 journal article 10.1649/0010-065X-73.2.259 1938-4394 5454617 Psephenoides Gahan, 1914 Discussion. Psephenoides is an older genus, having been described by Gahan (1914) . For many years, there were only four described species, two of which were originally described in other genera. However, Jeng and Yang (1994) recognized six species, of which one undescribed species occurs in Thailand .