Chondrina arigonoides, Kokshoorn & Gittenberger, 2010

Kokshoorn, Bas & Gittenberger, Edmund, 2010, Chondrinidae taxonomy revisited: New synonymies, new taxa, and a checklist of species and subspecies (Mollusca: Gastropoda: Pulmonata) 2539, Zootaxa 2539 (1), pp. 1-62 : 34-35

Chondrina arigonoides spec. nov. (pl. 10 fig. E)

Material.— Spain, Alicante , SW of Marquesa along path into nature reserve; 170 m alt.; UTM BD4600 . Type series: RMNH 109861 / holotype, 103233/ 24 paratypes .

Description.—Shell brownish, moderately slender conical, with only the last whorl somewhat narrowed; densely sculptured with relatively coarse riblets, which are increasingly irregular on the lower whorls. Aperture with four prominent teeth, viz. the palatales superior and inferior, parietalis and columellaris, a moderately prominent infracolumellaris, a more or less obsolete angularis, and sometimes a vestigial infrapalatalis. Apertural lip somewhat thickened, not reflexed. Shell height, 5.4–6.4 mm; width 2.5–2.7 mm.

Differentiation.—At some places within the range of C. arigonis , C. arigonoides is found with shells that are smaller and more conspicuously sculptured, with an apertural lip which is not strongly thickened and flattened.

Notes.—Probably this species, or a closely related one, occurs sympatrically with C. arigonis also in the province of Alicante, near the Cascada de El Algar ( UTM YH5180), and in the province of Valencia, at Col de Tous, 500 m alt. ( UTM YJ0237). Taking the extreme diversity in Chondrina into account, we prefer to restrict C. arigonoides for the time being to the population for which DNA data are available.

Derivatio nominis.—The epithet refers to the similarity with C. arigonis in apertural teeth.