1970
Monograptus exiguus (Nicholson, 1868) — Hutt et al., pp. 11, fig. 2:43-46
1991
Pseudostreptograptus williamsi gen. et sp. nov. — Loydell, pp. 236, fig. 21a-b, e-h, 22f, 23
1993
Pseudostreptograptus williamsi Loydell, 1991 — Loydell, pp. 102, fig. 4:5; 5:8
2004
Pseudostreptograptus williamsi Loydell, 1991 — Loydell et Maletz, pp. 90, fig. 22-25