Sánchez, D. & Arias, S. 2022: Updates to the Cactaceae species-level checklist for the genera Peniocereus, Pachycereus, Backebergia and Pterocereus. – Published online at https://caryophyllales.org/cactaceae/Checklist.

Title	Updates to the Cactaceae species-level checklist for the genera Peniocereus, Pachycereus, Backebergia and Pterocereus. – Published online at https://caryophyllales.org/cactaceae/Checklist.
Authorship	Sánchez, D. & Arias, S.
Date published	2022