<==o †Climatiidae Berg, 1940
   |--o †Brachyacanthus Egerton, 1860, L. Dev. Eu. 
   |  `-- †B. scutiger
   |--o †Cheiracanthoides Wells, 1944 [Helolepis] M. Dev. NA.
   |  |-- †C. comptus Wells, 1944
   |  |-- †C. proprius Valiukevicius, 1985
   |  |-- †C. rarus Valiukevicius, 1994
   |  |-- †C. borealis Valiukevicius, 1994
   |  |-- †C. estonicus Valiukevicius, 1998
   |  |-- †C. nativus Valiukevicius, 1998
   |  |-- †C. planus Valiukevicius, 1998
   |  |-- †C. wangi Burrow et al., 2000
   |  |-- †C. dolosus Burrow et al., 2000
   |  `-- †C. mosolovicus Valiukevicius, 2003
   |--o †Climatius Agassiz, 1845, U. Sil. L. Dev. Eu. NA. EEu.
   |  `-- †C. reticulatus Agassiz, 1845
   |-- †Eiffellepis werneri Vieth-Schreiner, 1983; M.Dev. Eu.
   |-- †Erriwacanthus Ørvik, 1967, U. Sil. Eu. L. Dev. EEu. 
   |-- †Latviacanthus ventspilsensis Schultze & Zidek, 1982; L. Dev. EEu. 
   |?-o †Nodacosta Gross, 1940; L.Dev. WNAm., L.-M.Dev. EEu.
   |  |-- †N. pauli Gross, 1940
   |  |?- ?†N. gemuendensis (Gross, 1933)
   |  `-- †N. denisoni Burrow, 2007
   |--o †Nostolepis Pander, 1856 sensu Valiukevičius & Burrow, 2005 [Dendracanthus; Diplacanthoides; Dontacanthus; Rhabdiodus] U. Sil. L. Dev. Eu. EEu. Gr. Spits.
   |  |-- †N. alta Märss, 1986
   |  |-- †N. amplifica Valiukevičius, 2003
   |  |-- †N. consueta Valiukevičius, 2003
   |  |-- †N. costata Goujet, 1976
   |  |-- †N. decora Valiukevičius, 2003
   |  |-- †N. guangxiensis Wang, 1992
   |  |-- †N. gracilis Gross, 1971
   |  |-- †N. kernavensis Valiukevičius, 1985
   |  |-- †N. kozhymica Valiukevičius, 2003
   |  |-- †N. linleyensis C. G. Miller & Märss, 1999
   |  |-- †N. magnicostata Valiukevičius, 2003
   |  |-- †N. minima Valiukevičius, 1994
   |  |-- †N. musca Valiukevičius, 2003
   |  |-- †N. parathleta Valiukevičius, 2003
   |  |-- †N. striata Pander, 1856 [type]
   |  |-- †N. taimyrica Valiukevičius, 1994
   |  `-- †N. terraborea Valiukevičius, 2003
   |?-o †“Nostolepis” Pander, 1856
   |  |-- †“N.” alifera
   |  |-- †“N.” elegans
   |  |-- †“N.” robusta
   |  `--+-- †“N.” arctica Vieth, 1980
   |     `-- †“N.” fragilis Valiukevičius, 2003
   |?-o †Nostolepoides Burrow, 1997
   |  |-- †N. platymarginata Burrow, 1997
   |  `?- ?†N. mingyinensis Wang, 2003
   |--o †Parexus Agassiz, 1845, L. Dev. Eu.
   |  |-- †P. recurvus
   |  `-- †P. falcatus
   |--o †Pruemolepis M. Dev. Eu.
   |  `-- †P. wellsi
   |--o †Ptomacanthus Miles, 1973, L. Dev. Eu. EEu.
   |  `-- †P. angelicus
   |-- †Sabrinacanthus L. Dev. Eu.
   |-- †Sevyacanthus elliotti Burrow, 2007; L.Dev. WNAm.
   |?-o †Tareyacanthus Valiukevičius, 1994
   |  |-- †T. magnificus Valiukevičius, 1994
   |  `-- †T. dissectus Valiukevičius, 1998
   |--o †Vernicomacanthus Miles, 1973, L. Dev. Eu.
   |  |-- †V. uncinatus
   |  `-- †V. waynensis
   |?- †Watsonacanthus Valiukevičius, 1979
   `-- †Wetteldorfia triangula Vieth-Schreiner, 1983; M.Dev. Eu. 

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