Although this species was named by Locard (1899), it was treated as synonym of X. belemensis by Gittenberger (1993).[3][4]
Description
Shells very similar to those of X. arrabidensis and X. belemensis, with a relatively large umbilicus, but shell breadth smaller at maturity and ribs on dorsal surface of body whorl less developed (absent or very weak).[3]
^Chueca, Luis J.; Gómez-Moliner, Benjamín J.; Madeira, María José; Pfenninger, Markus (January 2018). "Molecular phylogeny of Candidula (Geomitridae) land snails inferred from mitochondrial and nuclear markers reveals the polyphyly of the genus". Molecular Phylogenetics and Evolution. 118: 357–368. doi:10.1016/j.ympev.2017.10.022. PMID29107619.
^ abHolyoak, David T.; Holyoak, Geraldine A. (2014). "A review of the genus Candidula in Portugal with notes on other populations in western Europe (Gastropoda, Pulmonata: Hygromiidae)". Journal of Conchology. 41: 629–672.
^Gittenberger, Edumnd (1993). "Digging in the grave-yard of synonymy, in search of Portuguese species of Candidula Kobelt, 1871 (Mollusca: Gastropoda Pulmonata: Hygromiidae)". Zoologische Mededelingen, Leiden. 67 (17): 283–293.