Classification of Chronic 1953
G. †Retispira Knight 1945
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†Retispira multiscalpta Thomas 1930
†Retispira tenuilirata Chronic 1949
G. †Orthonychia Hall 1843
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†Orthonychia pajerensis Chronic 1949
†Orthonychia parva Shumard and Swallow 1858
G. †Pseudoparalegoceras Miller 1934
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†Pseudoparalegoceras peruvianum Berry 1928
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Invalid names: Gastrioceras pacificum Thomas 1928 [synonym]
G. †Palaeonucula Quenstedt 1930
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†Palaeonucula levatiformis Walcott 1884
†Palaeonucula terminalis Chronic 1949
G. †Grammatodon Meek and Hayden 1860
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†Grammatodon tenuistriatus Meek and Worthen 1866
G. †Aviculopecten M'Coy 1851
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†Aviculopecten crassispinosus Chronic 1949
†Aviculopecten multiscalptus Thomas 1928
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Invalid names: Aviculopecten bravoi Thomas 1928 [synonym], Aviculopecten sullanaensis Thomas 1928 [synonym]
G. †Astartella Hall 1858
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†Astartella cavernata Chronic 1949
†Astartella meridionalis Thomas 1928
†Astartella nasuta Girty 1908
G. †Cervella Chronic 1949
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†Cervella aspera Chronic 1949
†Cervella cervoidea Chronic 1949
G. †Fenestrellina d'Orbigny 1849
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†Fenestrellina apurimacana Chronic 1949
†Fenestrellina huascatayana Chronic 1949
†Fenestrellina nodograciosa Chronic 1949
†Fenestrellina pajerensis Chronic 1949
†Fenestrellina picchuensis Chronic 1949
†Fenestrellina salebrosa Chronic 1949
G. †Polypora
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†Polypora andina Chronic 1949
†Polypora inimica Chronic 1949
†Polypora spissa Chronic 1949
G. †Rhipidomella
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†Rhipidomella cora d'Orbigny 1842
†Rhipidomella penniana Derby 1874
G. †Lissochonetes Dunbar and Condra 1932
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†Lissochonetes amazonicus Derby 1874
†Lissochonetes assula Chronic 1949
G. †Cleiothyridina Buckman 1906
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†Cleiothyridina barbata Chronic 1949
†Cleiothyridina intonsa Chronic 1949
G. †Hustedia Hall and Clarke 1893
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†Hustedia meridionalis Chronic 1949
†Hustedia sicuaniensis Chronic 1949
G. †Neospirifer Fredericks 1919
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†Neospirifer cameratus Morton 1836
†Neospirifer condor d'Orbigny 1842
G. †Phricodothyris George 1932
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†Phricodothyris guadalupensis Shumard 1859
†Phricodothyris septata Chronic 1949
G. †Punctospirifer North 1920
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†Punctospirifer adstrictus Chronic 1949
†Punctospirifer inflatus Chronic 1949
†Punctospirifer patulus Chronic 1949
G. †Reticulariina Fredericks 1916
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†Reticulariina atava Chronic 1949
†Reticulariina constricta Chronic 1949
†Reticulariina fruticosa Chronic 1949
†Reticulariina spinosa Norwood and Pratten 1855
G. †Dielasma King 1856
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†Dielasma rotundum Chronic 1949
†Dielasma scitulum Chronic 1949
G. †Allorisma King 1844
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†Allorisma barringtoni Thomas 1928
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Invalid names: Allorisma amotapense Thomas 1928 [synonym], Allorisma baldryi Thomas 1928 [synonym], Allorisma parinasense Thomas 1928 [synonym]