Achelia vulgaris (Costa, 1861) (additional source)
Ammonicerina O. G. Costa, 1861 accepted as Omalogyra Jeffreys, 1859 (original description)
Ammonicerina mutabilis O. G. Costa, 1861 accepted as Heliacus fallaciosus (Tiberi, 1872) (original description)
Ammonicerina paucicostata O. G. Costa, 1861 accepted as Ammonicera rota (Forbes & Hanley, 1850) (original description)
Ammonicerina pulchella O. G. Costa, 1861 accepted as Ammonicera rota (Forbes & Hanley, 1850) (original description)
Ammonicerina simplex O. G. Costa, 1861 accepted as Omalogyra simplex (O. G. Costa, 1861) (original description)
Buccinina Costa, 1861 (original description)
Buccinina recurva Costa, 1861 (original description)
Buccinina subrecta Costa, 1861 (original description)
Cheironotus Costa, 1861 (original description)
Cheironotus hexadactylus Costa, 1861 (original description)
Heliciella O. G. Costa, 1861 accepted as Danilia Brusina, 1865 (original description)
Heliciella costellata O. G. Costa, 1861 accepted as Danilia costellata (O. G. Costa, 1861) (original description)
Heliciella mutabilis O. G. Costa, 1861 (original description)
Lingulina ampullacea Costa, 1861 (original description)
Lingulina gracillima Costa, 1861 (original description)
Lingulina mediterranea Costa, 1861 (original description)
Lingulina polymorpha Costa, 1861 accepted as Spirolingulina polymorpha (O.G. Costa, 1861) (original description)
Marginulina clathrata Costa, 1861 (original description)
Marginulina flexuosa Costa, 1861 (original description)
Monocerina Costa, 1861 (original description)
Monocerina diaphana Costa, 1861 (original description)
Murex rugulosus O. G. Costa, 1861 accepted as Muricopsis cristata (Brocchi, 1814) (original description)
Murex spinulosus O. G. Costa, 1861 accepted as Muricopsis spinulosa (O. G. Costa, 1861) accepted as Muricopsis aradasii (Monterosato, 1883) accepted as Murexsul aradasii (Monterosato, 1883) (original description)
Protomedea O. G. Costa, 1861 accepted as Heliconoides A. d'Orbigny, 1835 (original description)
Protomedea elata O. G. Costa, 1861 accepted as Heliconoides inflatus (A. d'Orbigny, 1835) (original description)
Protomedea ornata O. G. Costa, 1861 accepted as Capulus ungaricus (Linnaeus, 1758) (original description)
Rhynchothorax Costa, 1861 (original description)
Rhynchothorax mediterraneus Costa, 1861 (original description)
Scissurella affinis O. G. Costa, 1861 † accepted as Anatoma aspera (R. A. Philippi, 1844) (original description)
Scissurella cingulata O. G. Costa, 1861 accepted as Sinezona cingulata (O. G. Costa, 1861) (original description)
Scissurella decipiens O. G. Costa, 1861 accepted as Scissurella costata A. d'Orbigny, 1824 (original description)
Serpula crenata Costa, 1861 accepted as Semivermilia crenata (O. G. Costa, 1861) (original description)
Serpula cribrata Costa, 1861 accepted as Semivermilia cribrata (O. G. Costa, 1861) (original description)
Serpula frondiculata Costa, 1861 accepted as Janita fimbriata (Delle Chiaje, 1822) (original description)
Serpula labiata Costa, 1861 accepted as Vermiliopsis labiata (O. G. Costa, 1861) (original description)
Serpula sulcosa Costa, 1861 accepted as Metavermilia multicristata (Philippi, 1844) (original description)
Solarium calcar O. G. Costa, 1861 accepted as Bolma rugosa (Linnaeus, 1767) (original description)
Spirolidium O. G. Costa, 1861 accepted as Parastrophia de Folin, 1869 (original description)
Spirolidium mediterraneum O. G. Costa, 1861 accepted as Parastrophia asturiana de Folin, 1870 (original description)
Trochus elegantissimus O. G. Costa, 1861 accepted as Mathilda cochlaeformis Brugnone, 1873 (original description)
Trochus horridus O. G. Costa, 1861 accepted as Danilia tinei (Calcara, 1839) (original description)
Vermetus annulatus O. G. Costa, 1861 accepted as Filogranula annulata (O. G. Costa, 1861) (original description)
Vermetus calyculatus O. G. Costa, 1861 accepted as Filogranula calyculata (O. G. Costa, 1861) (original description)
Vermetus mutabilis O. G. Costa, 1861 accepted as Filogranula calyculata (O. G. Costa, 1861) (original description)

Unknown type, geounit Mediterranean Sea, identified as Achelia vulgaris (Costa, 1861)
Unknown type, geounit Mediterranean Sea, identified as Rhynchothorax mediterraneus Costa, 1861

 Editor's comment

 for Cheironotus hexadactylus Costa, 1861

Cheironotus hexadactylus apppears to have been unused as a name subsequent to its description. It appears to ... [details]