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CCDB → Gymnosperms → Zamiaceae → Dioon
| Taxon name | Status | Median (n) |
| Dioon califanoi D. Luca & Sabato | Accepted | 9 |
| Dioon caputoi D. Luca & Sabato & V. Torres | Accepted | 9 |
| Dioon edule Lindl. | Accepted | 9 |
| Dioon holmgrenii D. Luca & Sabato & V. Torres | Accepted | 9 |
| Dioon mejiae Standl. & L. O. Williams | Accepted | 9 |
| Dioon merolae D. Luca & Sabato & V. Torres | Accepted | 9 |
| Dioon purpusii Rose | Accepted | 9 |
| Dioon rzedowskii D. Luca & al. | Accepted | 9 |
| Dioon spinulosum Dyer ex Eichl. | Accepted | 9 |
| Dioon tomasellii D. Luca & Sabato & V. Torres | Accepted | 9 |
| Dioon edule var. latipinnium Dyer | Synonym of Dioon mejiae Standl. & L. O. Williams | 9 |