Taxonomic names from H. J. Harrington and A. F. Leanza 1957
- Acadagnostus argentinus, H. J. Harrington and A. F. Leanza 1957 [Diplagnostidae]
- Angelina kayseri, H. J. Harrington and A. F. Leanza 1957 [Olenidae]
- Apatokephalus exiguus, H. J. Harrington and A. F. Leanza 1957 [Remopleurididae]
- Apatokephalus serratus, Boeck 1838 [Remopleurididae]
- Araiopleura reticulata, H. J. Harrington and A. F. Leanza 1957 [Alsataspididae]
- Asaphellus catamarcensis, Kobayashi 1935 [Asaphidae]
- Asaphellus riojanus, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Asaphopsis intermedia, H. J. Harrington and A. F. Leanza 1957 [Hungaiidae]
- Australoharpes depressus, H. J. Harrington and A. F. Leanza 1957 [Harpetidae]
- Australopyge acanthura, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Australopyge russoi, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Basiliella carinata, Harrington 1938 [Asaphidae]
- Beltella ulrichi, Kayser 1897 [Olenidae]
- Bodenbenderia longifrons, H. J. Harrington and A. F. Leanza 1957 [Leiostegiidae]
- Brackebuschia acheila, H. J. Harrington and A. F. Leanza 1957 [Leiostegiidae]
- Calymenella zaplensis, H. J. Harrington and A. F. Leanza 1957 [Homalonotidae]
- Calymenina, suborder, Swinnerton 1915 [Phacopida]
- Ceratopyge forficuloides, H. J. Harrington and A. F. Leanza 1957 [Ceratopygidae]
- Ciceragnostus iruyensis, Kayser 1897 [Agnostida]
- Colpocoryphoides trapezoidalis, H. J. Harrington and A. F. Leanza 1957 [Pharostomatidae]
- Conocoryphacea, superfamily, Swinnerton 1915 [Ptychopariida]
- Deltacare prosops, H. J. Harrington and A. F. Leanza 1957 [Trilobita]
- Dichelepyge pascuali, Harrington and Leanza 1952 [Ceratopygidae]
- Dolerasaphus, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Dolerasaphus laevis, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Encrinurus niquivilensis, H. J. Harrington and A. F. Leanza 1957 [Encrinuridae]
- Famatinolithus noticus, H. J. Harrington and A. F. Leanza 1957 [Trinucleidae]
- Gallagnostus bolivianus, Hoek 1912 [Peronopsidae]
- Geragnostus (Geragnostus), Howell 1935 [Metagnostidae]
- Geragnostus (Geragnostus) callaveiformis (H. J. Harrington and A. F. Leanza 1957) [Metagnostidae]
- Geragnostus (Geragnostus) maurii, H. J. Harrington and A. F. Leanza 1957 [Metagnostidae]
- Geragnostus (Geragnostus) nesossii, H. J. Harrington and A. F. Leanza 1957 [Metagnostidae]
- Geragnostus (Microagnostus), Howell 1935 [Metagnostidae]
- Geragnostus (Microagnostus) callaveiformis (H. J. Harrington and A. F. Leanza 1957) [Metagnostidae]
- Geragnostus (Microagnostus) calviformis, H. J. Harrington and A. F. Leanza 1957 [Metagnostidae]
- Geragnostus (Microagnostus) calviformis, H. J. Harrington and A. F. Leanza 1957 [Agnostidae]
- Geragnostus (Microagnostus) hoeki, Kobayashi 1939 [Metagnostidae]
- Geragnostus (Microagnostus) micropeltis, H. J. Harrington and A. F. Leanza 1957 [Metagnostidae]
- Geragnostus (Microagnostus) neumanni, H. J. Harrington and A. F. Leanza 1957 [Metagnostidae]
- Geragnostus (Microagnostus) tilcuyensis, Kobayashi 1937 [Metagnostidae]
- Geragnostus (Microagnostus) vilonii, H. J. Harrington and A. F. Leanza 1957 [Metagnostidae]
- Geragnostus callaveiformis (H. J. Harrington and A. F. Leanza 1957) [Metagnostidae]
- Guandacolithus furquei, H. J. Harrington and A. F. Leanza 1957 [Trinucleidae]
- Gymnagnostus perinflatus (H. J. Harrington and A. F. Leanza 1957) [Agnostidae]
- Hapalopleura clavata, H. J. Harrington and A. F. Leanza 1957 [Hapalopleuridae]
- Hapalopleura longicornis, H. J. Harrington and A. F. Leanza 1957 [Hapalopleuridae]
- Harpides neogaeus, H. J. Harrington and A. F. Leanza 1957 [Harpididae]
- Hoekaspis megacantha, Leanza 1941 [Asaphidae]
- Hoekaspis schlagintweiti, Harrington and Leanza 1942 [Asaphidae]
- Hypermecaspididae, family, H. J. Harrington and A. F. Leanza 1957 [Hypermecaspididae]
- Hypermecaspis armata, H. J. Harrington and A. F. Leanza 1957 [Olenidae]
- Hypermecaspis bulmani, H. J. Harrington and A. F. Leanza 1957 [Olenidae]
- Hypermecaspis inermis, H. J. Harrington and A. F. Leanza 1957 [Olenidae]
- Hypermecaspis inflecta, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Illaenacea, superfamily, Corda 1847 [Asaphida]
- Jujuyaspis keideli, Kobayashi 1936 [Olenidae]
- Kainella conica, Kobayashi 1935 [Remopleurididae]
- Kainella meridionalis, Kobayashi 1935 [Remopleurididae]
- Kayseraspis asaphelloides, Harrington 1938 [Asaphidae]
- Kayseraspis brackebuschi, Harrington 1938 [Asaphidae]
- Keidelia, H. J. Harrington and A. F. Leanza 1957 [Telephinidae]
- Keidelia macrophthalma, H. J. Harrington and A. F. Leanza 1957 [Telephinidae]
- Leiagnostus perinflatus, H. J. Harrington and A. F. Leanza 1957 [Agnostida]
- Leiagnostus turgidulus, H. J. Harrington and A. F. Leanza 1957 [Agnostida]
- Leiostegiacea, superfamily, Bradley 1925 [Ptychopariida]
- Leptoplastinae, subfamily, Angelin 1854 [Olenidae]
- Lloydia (Leiostegium), Raymond 1913 [Leiostegiidae]
- Lloydia (Leiostegium) douglasi, Harrington 1937 [Leiostegiidae]
- Lonchodomas suriensis, H. J. Harrington and A. F. Leanza 1957 [Raphiophoridae]
- Machairagnostus tmetus, H. J. Harrington and A. F. Leanza 1957 [Diplagnostidae]
- Megalaspidella kayseri, Kobayashi 1937 [Asaphidae]
- Megalaspis pugiocauda, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Megalaspis saltaensis, Kayser 1898 [Asaphidae]
- Mekynophrys nanna, Harrington 1938 [Asaphidae]
- Mendolaspis salagastensis, Rusconi 1951 [Raphiophoridae]
- Metapilekia bilirata, Harrington 1938 [Cheiruridae]
- Nanillaenus gualcamayensis, H. J. Harrington and A. F. Leanza 1957 [Illaenidae]
- Nannopeltis, H. J. Harrington and A. F. Leanza 1957 [Ceratopygidae]
- Nannopeltis modesta, Harrington 1938 [Ceratopygidae]
- Nileidae stenorhachis, Harrington 1938 [Nileidae]
- Niobides armatus, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Niobina taurina, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Ogygiinae, subfamily, Raymond 1913 [Asaphidae]
- Ogygiocarella debuchana, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Ogygiocaris araiorhachis, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Ogygitella, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Ogygitella australis, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Olenina, suborder, Hupe 1952 [Ptychopariida]
- Onychopyge argentina, H. J. Harrington and A. F. Leanza 1957 [Ceratopygidae]
- Onychopyge longispina, H. J. Harrington and A. F. Leanza 1957 [Ceratopygidae]
- Onychopyge plagiacantha, H. J. Harrington and A. F. Leanza 1957 [Ceratopygidae]
- Orometopidae, family, Hupe 1955 [Orometopidae]
- Orometopus notatifrons, H. J. Harrington and A. F. Leanza 1957 [Alsataspididae]
- Orometopus pyrifrons, Harrington 1938 [Orometopidae]
- Parabasilicus typicalis, Kobayashi 1937 [Asaphidae]
- Parabolina kobayashii, H. J. Harrington and A. F. Leanza 1957 [Olenidae]
- Parabolina pheidolopyge, Harrington 1938 [Olenidae]
- Parabolinella coelatifrons, H. J. Harrington and A. F. Leanza 1957 [Olenidae]
- Parabolinella triarthroides, Harrington 1938 [Olenidae]
- Peronopseinae, subfamily, Westergard 1938 [Peronopsidae]
- Phalacrominae, subfamily, Raymond 1913 [Peronopsidae]
- Plesioparabolina proparia, Harrington and Leanza 1942 [Olenidae]
- Plicatolina scalpta, H. J. Harrington and A. F. Leanza 1957 [Olenidae]
- Pliomera tmetophrys, H. J. Harrington and A. F. Leanza 1957 [Pliomeridae]
- Pliomeroides, H. J. Harrington and A. F. Leanza 1957 [Cheiruridae]
- Pliomeroides deferrariisi, Harrington 1938 [Cheiruridae]
- Porterfieldia jachalensis, H. J. Harrington and A. F. Leanza 1957 [Olenidae]
- Proceratopyge incondita, H. J. Harrington and A. F. Leanza 1957 [Ceratopygidae]
- Proetacea, superfamily, Corda 1847 [Ptychopariida]
- Proetiella, H. J. Harrington and A. F. Leanza 1957 [Leiostegiidae]
- Protopeltura mesembria, H. J. Harrington and A. F. Leanza 1957 [Olenidae]
- Protopliomerops rossi, H. J. Harrington and A. F. Leanza 1957 [Pliomeridae]
- Pseudagnostinae, subfamily (Whitehouse 1936) [Pseudagnostidae]
- Pseudohysterolenus infidus, H. J. Harrington and A. F. Leanza 1957 [Ceratopygidae]
- Pseudokainella keideli, Harrington 1938 [Remopleurididae]
- Pseudokainella lata, Kobayashi 1935 [Remopleurididae]
- Pseudokainella pustulosa, H. J. Harrington and A. F. Leanza 1957 [Remopleurididae]
- Pseudoperonopsis zuninoi, H. J. Harrington and A. F. Leanza 1957 [Agnostidae]
- Raphiophorus lamasi, H. J. Harrington and A. F. Leanza 1957 [Raphiophoridae]
- Remopleuridioides preandinus, H. J. Harrington and A. F. Leanza 1957 [Nileidae]
- Rhadinopleura eurycephala, H. J. Harrington and A. F. Leanza 1957 [Alsataspididae]
- Richardsonellinae, subfamily (Raymond 1924) [Richardsonellidae]
- Saltaspis steinmanni, Harrington and Leanza 1952 [Olenidae]
- Shumardia erquensis, Kobayashi 1937 [Shumardiidae]
- Sphaerocare globifrons, H. J. Harrington and A. F. Leanza 1957 [Trilobita]
- Synhomalonotus kobayashi (H. J. Harrington and A. F. Leanza 1957) [Calymenidae]
- Synhomalonotus kobayashii, H. J. Harrington and A. F. Leanza 1957 [Calymenidae]
- Thysanopyge argentina, Kayser 1898 [Asaphidae]
- Thysanopyge clavijoi, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Thysanopyge latelimbata, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]
- Tretaspidinae, subfamily, Whittington 1941 [Trinucleidae]
- Triarthrus parchaensis, H. J. Harrington and A. F. Leanza 1957 [Olenidae]
- Triarthrus shinetonensis, Raw 1908 [Olenidae]
- Trinodus jujuyensis, Harrington 1938 [Metagnostidae]
- Trinodus saltaensis, H. J. Harrington and A. F. Leanza 1957 [Metagnostidae]
- Trinucleina, suborder, Swinnerton 1915 [Trinucleida]
- Zuninaspis acuminata, H. J. Harrington and A. F. Leanza 1957 [Asaphidae]