200
Didymograptus spinulosus Perner — Dean et al., pp. 568, fig. fig. 10 i-l
1895
Didymograptus spinulosus — Perner, pp. 22, fig. pl 5:9, 10
1973
Didymograptus spinulosus Perner — Boucek, pp. 88-90, fig. fig. 13.1-4, text fig. 27a-d
1987
Didymograptus (Didymograptus) spinulosus Perner — Fortey & Owens, pp. 255-258, fig. Fig. 110, 111, 112
1995
Didymograptus spinulosus Perner — Maletz, pp. 250, fig. 1A
2009
Didymograptus spinulosus Perner, 1895 — Zhang et al., pp. 319, fig. fig. 6I