Nothopsis rugosus COPE 1871
| Descriptions of new snakes in the collection of the British Museum George A Boulenger (1905) Annals and Magazine of Natural History ser. 7 15: 453-456 | |
| A brief review of the snakes of Costa Rica E H Taylor (1951) University of Kansas Science Bulletin 34: 3-188 | |
| Catalogue of the Neotropical Squamata. Part I. Snakes James A Peters and Braulio Orejas-Miranda (1970) Bulletin United States National Museum 297: 1-347 |