Species

Tetragraptus spinosus (Spjeldnaes, 1953)

Synonymy list

1904 ?(pars) Tetragraptus similis (J. Hall) — Ruedemann , pp. 658, fig. 12:10, text fig. 58a,b

1937 (pars) Isograptus caduceus norvegicus n. var. — Monsen , pp. 154, fig. 5:17

1953 Isograptus spinosus n. sp. — Spjeldnaes , pp. 177, fig. 1:1; text fig. 1A

2011 Tetragraptus (?) spinosus (Spjeldnaes, 1953) — Maletz , pp. 273, fig. 5j-l

Classification