Tomellana semimarginata is an extinct species of sea snails, a marine gastropod mollusc in the family Clavatulidae.MolluscaBase eds. (2023). MolluscaBase. Tomellana semimarginata (Lamarck, 1822) †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1575541 on 2023-08-03
Distribution Fossils of this marine species were found in Miocene strata in Aquitaine, France.
References
Cossmann (M.), 1896 - Essais de Paléoconchologie comparée (2ème livraison), p. 1-179
External links Harzhauser, M.; Landau, B.; Janssen, R. (2022). The Clavatulidae (Gastropoda, Conoidea) of the Miocene Paratethys Sea with considerations on fossil and extant Clavatulidae genera. Zootaxa. 5123(1): 1-172.