original description
Loomis, H. F. (1966). Two new families and other North American Diplopoda of the suborder Chordeumidea. Proceedings of the Biological Society of Washington, 79: 221-230. Washington
page(s): 221 [details]
additional source
Shear, W. A. (2003). A second species of the rare milliped family Apterouridae (Diplopoda: Chordeumatida: Striarioidea). Proceedings of the Biological Society of Washington, 116(2): 509-514, available online at https://www.biodiversitylibrary.org/page/34565383 [details] Available for editors 
additional source
Shear, W. A. (1976). The systematic position of the milliped family Apterouridae (Diplopoda, Chordeumida, Striarioidea) and a redescription of Apterourus horizontalis Loomis. <em>Proceedings of The Biological Society of Washington.</em> 89: 689-694., available online at https://www.biodiversitylibrary.org/page/34554163 [details] Available for editors 
From editor or global species database