Valdez-Mondragón, A. “COI MtDNA Barcoding and Morphology for Species Delimitation in the Spider Genus Ixchela Huber (Araneae: Pholcidae), With the Description of Two New Species from Mexico”. Zootaxa, vol. 4747, no. 1, Mar. 2020, pp. 54–76, doi:10.11646/zootaxa.4747.1.2.