Floyd W. Shockley; Dale Greenwalt (2013). "Ptenidium kishenehnicum (Coleoptera: Ptiliidae), a New Fossil Described from the Kishenehn Oil Shales, with a Checklist of Previously Known Fossil Ptiliids". Proceedings of the Entomological Society of Washington. 115 (2): 173–181. doi:10.4289/0013-8797.115.2.173. S2CID28658836.
Floyd W. Shockley; Dale Greenwalt (2013). "Ptenidium kishenehnicum (Coleoptera: Ptiliidae), a New Fossil Described from the Kishenehn Oil Shales, with a Checklist of Previously Known Fossil Ptiliids". Proceedings of the Entomological Society of Washington. 115 (2): 173–181. doi:10.4289/0013-8797.115.2.173. S2CID28658836.