Paulsen, M.J. and Smith, A.D. 2005. A new species of stag beetle from sand dunes in west Texas, and a synopsis of the genus Nicagus (Coleoptera: Lucanidae: Aesalinae: Nicagini). Zootaxa. 1050, 1 (Sep. 2005), 45–60. DOI:https://doi.org/10.11646/zootaxa.1050.5.