IRMNG Taxon list
Firensia Scopoli, 1777 (uncertain )
Firkantus Viertler, Klopfstein & Spasojevic, 2023 †
Firkea Rafinesque, 1838 (uncertain )
Firmacidaris Lambert, 1937 † (uncertain > nomen dubium )
Firmiana Marsili, 1786
Firmiana platanifolia (L. f.) Schott & Endl. accepted as Firmiana simplex (L.) W. Wight
Firmiana simplex (L.) W. Wight
Firmianites Cockerell, 1909 † (uncertain )
Firmicornus † (uncertain )
Firmicus Simon, 1895
Firmicus abnormis (Lessert, 1923)
Firmicus arushae Caporiacco, 1947
Firmicus aurantipes Jézéquel, 1966
Firmicus biguttatus Caporiacco, 1940
Firmicus bimaculatus (Simon, 1886)
Firmicus bipunctatus Caporiacco, 1941
Firmicus bivittatus Simon, 1895
Firmicus bragantinus (Brito Capello, 1866)
Firmicus campestratus Simon, 1907
Firmicus dewitzi Simon, 1899
Firmicus duriusculus Simon, 1903
Firmicus haywoodae Jézéquel, 1964
Firmicus insularis (Blackwall, 1877)
Firmicus lentiginosus (Simon, 1886)
Firmicus paecilipes Caporiacco, 1940
Firmicus strandi Caporiacco, 1947
Firmicus werneri Simon, 1906
Firmicutes
Firminus Coca-Abia, 2003 (uncertain )
Firmiscala de Boury, 1909 accepted as Epitonium Röding, 1798
Firmiscala multicostata (G.B. Sowerby, 1844) accepted as Epitonium multicostatum (Sowerby, 1844)
Firmitermes Sjöstedt, 1926 (uncertain )
Firmothrips Schliephake, 1972
Firmysporites M. Pi-Radondy & J. Doubinger, 1968 † (uncertain )
Firola Bruguière, 1791 accepted as Pterotrachea Forsskål, 1775
Firola coronata (Forskål, 1775) accepted as Pterotrachea coronata Forskål, 1775
Firolella Troschel, 1855 accepted as Firoloida Lesueur, 1817
Firolidae Rafinesque, 1815 accepted as Pterotracheidae Oken, 1815
Firoloida Lesueur, 1817
Firoloida demarestia Lesueur, 1817
Firoloida desmaresti Lesueur, 1817
Firoloida desmarestia Lesueur, 1817
Firoloida kowalewskyi Vassiere, 1904
Firoloida lesueuri Orbigny, 1835 accepted as Firoloida demarestia Lesueur, 1817
Firoloidea Carpenter, 1861 accepted as Firoloida Lesueur, 1817
Firoloides Deshayes, 1830 accepted as Firoloida Lesueur, 1817