• Gregariella Monterosato, 1883
• Gregariella africana (Bartsch, 1915) accepted as Gregariella difficilis (Deshayes, 1863)
• Gregariella albanyana (W. H. Turton, 1932) accepted as Gregariella difficilis (Deshayes, 1863)
• Gregariella arcaeformis (Cossmann, 1887) †
• Gregariella australis (E. von Martens, 1879)
• Gregariella bakeri (Dall, Bartsch & Rehder, 1938)
• Gregariella barbata (Reeve, 1858)
• Gregariella barbatella (Cantraine, 1835) accepted as Gregariella petagnae (Scacchi, 1832)
• Gregariella chenui (Récluz, 1842)
• Gregariella coarctata (P. P. Carpenter, 1857)
• Gregariella coralliophaga (Gmelin, 1791)
• Gregariella denticulata (Dall, 1871)
• Gregariella difficilis (Deshayes, 1863)
• Gregariella ehrenbergi (Issel, 1869)
• Gregariella exilis (R. A. Philippi, 1847)
• Gregariella fischeri (E. A. Smith, 1885)
• Gregariella lornensis (Laws, 1932) †
• Gregariella multistriata (E. A. Smith, 1872)
• Gregariella nubilis (Iredale, 1937)
• Gregariella obermulleri (Fischer-Piette & Nicklès, 1946)
• Gregariella opifex (Say, 1825) accepted as Modiola opifex Say, 1825
• Gregariella pectiniformis (Deshayes, 1830) †
• Gregariella petagnae (Scacchi, 1832)
• Gregariella pihetei (Deshayes, 1858) †
• Gregariella ridgei Garvie, 1996 †
• Gregariella semigranata (Reeve, 1858)
• Gregariella setigera (Dunker, 1857)
• Gregariella simplicifilis Barnard, 1964 accepted as Gregariella petagnae (Scacchi, 1832)
• Gregariella splendida (sensu Reeve, 1858)
• Gregariella striatula (Hanley, 1843) accepted as Dentimodiolus striatulus (Hanley, 1843)
• Gregariella subclavata (Libassi, 1859) accepted as Gregariella semigranata (Reeve, 1858)
• Gregariella vignoni (Petit de la Saussaye, 1862)
• Modiolaria (Gregariella) Monterosato, 1883 † accepted as Gregariella Monterosato, 1883
• Modiolaria (Gregariella) petagnae (Scacchi, 1832) † (uncertain > unassessed)
• Modiolaria (Gregariella) petagnae var. antelaevis Sacco, 1898 † (uncertain > unassessed)
• Modiolaria (Gregariella) petagnae var. plioparva Sacco, 1898 † (uncertain > unassessed)
• Musculus (Gregariella) Monterosato, 1884 accepted as Gregariella Monterosato, 1883
• Musculus (Gregariella) arcaeformis (Cossmann, 1887) † accepted as Gregariella arcaeformis (Cossmann, 1887) †
• Musculus (Gregariella) pectiniformis (Deshayes, 1830) † accepted as Gregariella pectiniformis (Deshayes, 1830) †
• Musculus (Gregariella) pihetei (Deshayes, 1858) † accepted as Gregariella pihetei (Deshayes, 1858) †
• Musculus (Gregariella) senhousia (W. H. Benson, 1842) accepted as Arcuatula senhousia (W. H. Benson, 1842)