28 genera are assigned to the class ACANTHODII

GenusFOPFOSLOPLOS
ApateacanthusDFrasDFras
AtopacanthusDEifeDFras-m
BrochoadmonesDGediDGedi
CassidicepsDGediDGedi
CheiracanthoidesDEife-uDFras-l
DoliodusSLudl-uDGedi-l
GemuendolepisDEmsi-lDEmsi-l
GladiobranchusDGediDGedi
GomphacanthusSPridCMosc-u
GomphonchusSLudlSLudl
GyracanthusDSiegCMosc-l
HanilepisSLudlSLudl
HaplacanthusDEmsi-uDFras
HomacanthusDEifeCBash-u
IschnacanthusSPridDSieg-l
KathemacanthusDGediDGedi
LupopsyrusDGediDGedi
MachaeracanthusDGedi-lDFras-l
MarsdeniusCBash-lCBash-l
NodocostaDEmsiDFras-l
NodonchusDSieg-lDSieg-l
NostolepisSWenlDGive-l
OnchusSLdov-uDFame
OracanthusCTourCSerp-l
PersacanthusDFras-lDFras-m
PoracanthodesSLudlSLudl
ProtogonacanthusDFras-lDFras-l
PruemolepisDGedi-lCTour-l

FOP = Period of first occurrence
FOS = Stage of first occurrence
LOP = Period of last occurrence
LOS = Stage of last occurrence

Stage abbreviations follow Sepkoski (2002).