Classification of Hoel 1999
Fm. †Asaphidae Burmeister 1843
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Subfm. †Isotelinae Angelin 1854
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G. †Megistaspis Jaanusson 1956
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Subg. †Megistaspis (Ekeraspis) Tjernvik 1956
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†Megistaspis (Ekeraspis) armata Tjernvik 1956
†Megistaspis (Ekeraspis) heroides Brøgger 1882
Subfm. †Niobinae Jaanusson 1959
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G. †Gog Fortey 1975
G. †Lapidaria Tjernvik 1956
Subfm. †Promegalaspidinae Jaanusson 1959
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G. †Promegalaspides Westergård 1939
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Subg. †Promegalaspides (Borogothus) Tjernvik 1956
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†Promegalaspides (Borogothus) intactus Moberg and Segerberg 1906
†Promegalaspides (Borogothus) stenorachis Angelin 1851
Subg. †Megistaspis (Paramegistaspis) Balashova 1976
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†Megistaspis (Paramegistaspis) norvegica Tjernvik 1956
†Megistaspis (Paramegistaspis) planilimbata Angelin 1851
Invalid names: Megistaspis (Varvaspis) Tjernvik and Johansson 1980 [objective synonym]