original description
Nordsieck, F. (1972). <i>Die europäischen Meeresschnecken (Opisthobranchia mit Pyramidellidae; Rissoacea). Vom Eismeer bis Kapverden, Mittelmeer und Schwarzes Meer</i>. Gustav Fischer, Stuttgart. XIII + 327 pp. [details]
basis of record
Anon (2006). Gastropoda Heterobranchia Heterostropha, in: Revisione della Checklist della fauna marina italiana., available online at http://www.faunaitalia.it/checklist/ [details]
additional source
Peñas, A. & Rolán, E. (1997). La familia Pyramidellidae Gray, 1840 (Mollusca, Gastropoda, Heterostropha) en Africa occidental. 2. Los géneros <i>Turbonilla</i> y <i>Eulimella</i>. <em>Iberus.</em> suplemento 3: 1-105., available online at https://zenodo.org/record/4646253 [details]
From editor or global species database
Nomenclature Some authors (e.g. van Aartsen, 1981; Peñas, Templado & Martínez, 1996) distinguish under the name Turbonilla pseudogradata a morphotype which could be specifically distinct from T. gradata, following in this Nordsieck's (1972) description and concept that Turbonilla gradata sensu Monterosato was different from that of Bucquoy, Dautzenberg & Dollfus (1883). Nevertheless the name was formally introduced as a replacement name for T. gradata Monterosato, 1884 which is (if considered separately available) an objective synonym, based on the same figure in Bucquoy, Dautzenberg & Dollfus, 1883 pl. 21 fig. 12. [details]