Classification of Geinitz 1861
G. †Calophyllum Dana 1846
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†Calophyllum profundum Germar 1842
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Invalid names: Caryophyllia quadrifida Howse 1848 [synonym], Turbinolia donatiana King 1848 [synonym]
G. Serpula Linnaeus 1758
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†Serpula planorbites Geinitz 1843
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Invalid names: Spirorbis helix King 1848 [synonym], Spirorbis permianus King 1850 [synonym]
†Serpula pusilla Geinitz 1848
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Invalid names: Serpula minutissima Howse 1848 [synonym], Vermilia obscura King 1848 [synonym]
†Serpula schubarthi von Schauroth 1854
G. Chiton Linnaeus 1758
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†Chiton cordatus Kirkby 1859
†Chiton cottai Geinitz 1846
†Chiton howseanus Kirkby 1857
†Chiton loftusianus King 1848
G. Dentalium Linnaeus 1758
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†Dentalium sorbii King 1850
†Dentalium speyeri Geinitz 1852
G. †Murchisonia d'Archiac and de Verneuil 1841
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†Murchisonia biarmica Kutorga 1842
†Murchisonia subangulata de Verneuil 1845
G. †Pleurotomaria Defrance 1826
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†Pleurotomaria antrina von Schlotheim 1816
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Invalid names: Pleurotomaria ampullosa Howse 1848 [synonym], Pleurotomaria permiana King 1848 [synonym], Pleurotomaria sedgwickii Howse 1848 [synonym], Pleurotomaria tunstallensis King 1848 [synonym]
†Pleurotomaria atomus Keyserling 1854
†Pleurotomaria penea de Verneuil 1845
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Invalid names: Pleurotomaria linkiana King 1850 [synonym]
†Pleurotomaria verneuili Geinitz 1848
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Invalid names: Pleurotomaria nodulosa King 1844 [synonym]
G. Turbo Linnaeus 1758
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†Turbo helicinus von Schlotheim 1820
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Invalid names: Turbo mancuniensis Brown 1839 [synonym], Turbo meyeri Muenster 1843 [synonym], Turbo minutus Brown 1839 [synonym], Turbo permianus King 1848 [synonym]
†Turbo obtusus Brown 1839
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Invalid names: Natica leibnitziana King 1848 [synonym], Rissoa minutissima Brown 1839 [synonym], Trochus pusillus Geinitz 1848 [synonym]
†Turbo taylorianus King 1850
†Turbo thomsonianus King 1848
G. Natica Scopoli 1777
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G. Turbonilla Risso 1826
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†Turbonilla altenburgensis Geinitz 1848
†Turbonilla phillipsi Howse 1848
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Invalid names: Loxonema fasciata King 1848 [synonym], Loxonema geinitziana King 1848 [synonym], Turritella tunstallensis Howse 1848 [synonym]
†Turbonilla symmetrica King 1844
G. Nucula Lamarck 1799
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†Nucula beyrichi von Schauroth 1854
†Nucula wymmensis Keyserling 1846
G. Arca Linnaeus 1758 [ark]
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†Arca kingiana de Verneuil 1845
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Invalid names: Arca permiana d'Orbigny 1850 [synonym], Arca zerrenneri Schauroth 1853 [synonym]
†Arca striata von Schlotheim 1816
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Invalid names: Arca antiqua Munster 1834 [synonym], Arca loftusiana Howse 1848 [synonym], Arca subtumida d'Orbigny 1850 [synonym], Arca tumida Sowerby 1824 [synonym], Cucullaea sulcata Sowerby 1829 [synonym]
G. †Gervillia Defrance 1820
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†Gervillia antiqua Muenster 1836
†Gervillia ceratophaga von Schlotheim 1816
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Invalid names: Bakevellia bicarinata King 1848 [synonym]
†Gervillia murchisoni Geinitz 1861
†Gervillia sedgwickiana King 1848
G. Pecten Müller 1776
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†Pecten kokscharofi de Verneuil 1845
†Pecten pusillus von Schlotheim 1816
G. †Schizodus King 1844
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†Schizodus obscurus Sowerby 1821
†Schizodus schlotheimi Geinitz 1841
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Invalid names: Axinus parvus Brown 1839 [synonym], Axinus pucillus Brown 1839 [synonym], Axinus rotundatus Brown 1839 [synonym], Axinus undatus Brown 1839 [synonym], Lucina minima Brown 1839 [synonym]
†Schizodus truncatus King 1844
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Invalid names: Schizodus dubius Schauroth 1856 [synonym], Schizodus rossicus de Verneuil 1845 [synonym]
G. Astarte Sowerby 1816
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†Astarte tunstallensis King 1850
†Astarte vallisneriana King 1848
G. Lucina Bruguière 1797
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†Lucina minutissima d'Orbigny 1850
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Invalid names: Cardiomorpha minuta Keyserling 1846 [replaced]
G. Tellina Linnaeus 1758
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G. †Edmondia de Koninck 1841
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G. †Hemitrochiscus von Schauroth 1854
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†Hemitrochiscus paradoxus von Schauroth 1854
G. †Fenestella Lonsdale 1839
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†Fenestella geinitzi d'Orbigny 1850
†Fenestella infundibuliformis Goldfuss 1826
†Fenestella retiformis von Schlotheim 1816
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Invalid names: Retepora flustracea Phillips 1829 [synonym]
G. Crania Retzius 1781
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†Crania kirkbyi Davidson 1858
†Crania schaurothi Geinitz 1861
G. †Productus
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†Productus cancrini de Verneuil 1845
†Productus geinitzianus de Koninck 1847
†Productus hemisphaerium Kutorga 1844
†Productus horridus Sowerby 1822
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Invalid names: Producta calva Sowerby 1827 [synonym], Productus humerosus Sowerby 1822 [synonym]
G. †Strophalosia King 1844
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†Strophalosia excavata Geinitz 1842
†Strophalosia goldfussi Münster 1839
†Strophalosia horrescens de Verneuil 1845
†Strophalosia lamellosa Geinitz 1848
†Strophalosia morrisiana King 1844
†Strophalosia wangenheimi de Verneuil 1845
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Invalid names: Aulosteges variabilis von Helmersen 1847 [synonym]
G. †Athyris
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†Athyris pectinifera Sowerby 1841
†Athyris royssiana Keyserling 1846
G. †Spirifer Sowerby 1818
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†Spirifer alatus von Schlotheim 1813
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Invalid names: Spirifer undulatus Sowerby 1827 [synonym], Trigonotreta permiana King 1848 [synonym]
†Spirifer blasii de Verneuil 1845
†Spirifer clannyanus King 1848
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Invalid names: Martinia winchiana King 1848 [synonym], Thecidium productiforme von Schauroth 1854 [synonym]
†Spirifer cristatus von Schlotheim 1816
†Spirifer curvirostris de Verneuil 1845
†Spirifer rugulatus Kutorga 1842
†Spirifer schrenki Keyserling 1846
G. Terebratula Müller 1776
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†Terebratula elongata von Schlotheim 1816
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Invalid names: Terebratulites complanatus von Schlotheim 1816 [synonym], Terebratulites latus von Schlotheim 1816 [synonym], Terebratulites sufflatus von Schlotheim 1816 [synonym]
G. †Janassa
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†Janassa bituminosa Schlotheim 1820
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Invalid names: Acrodus larva Agassiz 1839 [synonym], Dictea striata Münster 1840 [synonym], Janassa angulata Münster 1839 [synonym], Janassa dictea Münster 1842 [synonym], Janassa humboldii Münster 1839 [synonym]
G. †Coelacanthus Agassiz 1839
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†Coelacanthus caudalis Egerton 1850
†Coelacanthus granulatus Agassiz 1839
†Coelacanthus hassiae Münster 1842
G. Leda Schumacher 1817
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Fm. Squalidae Bonaparte 1834 [dogfish shark]
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G. Avicula Bruguière 1791
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†Avicula kasanensis de Verneuil 1845
†Avicula keyserlingi d'Orbigny 1850
†Avicula lorata Keyserling 1846
†Avicula pinnaeformis Geinitz 1848
†Avicula speluncaria von Schlotheim 1816
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Invalid names: Avicula gryphaeoides Sowerby 1829 [synonym], Monotis garforthensis King 1850 [synonym], Monotis radialis Phillips 1834 [synonym], Ostrea matercula de Verneuil 1845 [synonym]
G. †Saurichnites Geinitz 1861
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†Saurichnites lacertoides Geinitz 1861
†Saurichnites salamandroides Geinitz 1861
G. †Pleurophorus King 1844
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G. †Cleidophorus Hall 1847
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†Cleidophorus hollebeni Geinitz 1861
†Cleidophorus pallasi de Verneuil 1845
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Invalid names: Cardiomorpha pleurophoriformis von Schauroth 1854 [synonym], Myoconcha modioliformis King 1844 [synonym]
G. †Camarophoria
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†Camarophoria schlotheimi von Buch 1835
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Invalid names: Camarophoria globulina Phillips 1834 [synonym], Camarophoria multiplicata King 1850 [synonym], Terebratula corymbosa Howse 1848 [synonym], Terebratula humbletonensis Howse 1848 [synonym]
G. †Phyllopora King 1849
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G. Chitonellus Lamarck 1819
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†Chitonellus antiquus Howse 1848
†Chitonellus distortus Kirkby 1859
†Chitonellus hancockianus Kirkby 1859
G. †Tragos Schweitzer 1820
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†Tragos binneyi King 1850
†Tragos tunstallensis King 1850
G. †Eocidaris Desor 1856
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G. Spongia Linnaeus 1759
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†Spongia eiseliana Geinitz 1861
†Spongia schubarthi Geinitz 1861