Rissoa parva interrupta var. bifasciata 01

Description:

Summary Bouchet & Rocroi (2005): Domain: Eukaryota • Regnum: Animalia • Subregnum: Eumetazoa • Cladus: Bilateria • Superphylum: Protostomia • Phylum: Mollusca • Classis: Gastropoda • Subclassis: Orthogastropoda • Superordo: Caenogastropoda • Ordo: Sorbeoconcha • Subordo: Hypsogastropoda • Infraordo: Littorinimorpha • Superfamilia: Rissooidea • Familia: Rissoidae • Genus: Rissoa • Species: Rissoa parva (da Costa, 1778) Description: English: Rissoa parva interrupta var. bifasciata Sars, 1878, Length 0.23 cm; Originating from Heligoland, Germany; Shell of own collection, therefore not geocoded. Original description by Sars 1878 (Bidrag til Kundskaben om Norges arktiske Fauna. I. Mollusca Regionis Arcticae Norvegiae. Oversigt over de i Norges arktiske Region Forekommende Bløddyr. Brøgger, Christiania. xiii + 466 pp., pls 1-34 & I-XVIII.): "Testa tenuior, fragilis, cornea, fasciis longitudinalibus nullis sed cingulis 2 spiralibus latis, fusco-rufescentibus supra aperturam confluentibus obducta, varice labiali obsoleta." Deutsch: Rissoa parva interrupta var. bifasciata Sars, 1878, Länge 0,23 cm; Herkunft: Helgoland, Deutschland. Date: 2 September 2019. Source: Own work. Author: H. Zell. To the gallery of shells[edit].