| author: | Mitchell RW, Kawakatsu M |
| title: | Freshwater cavernicole planarians from Mexico: New troglobiotic and troglophilic Dugesia from caves of the Sierra de Guatemala. |
| publication: | Annales de Spéléologie, 27: 639-681 [Date on title page 1972; actually published in 1973] |
| year: | 1973 |