1858
Graptolithus headi — Hall, pp. 161
1865
Graptolithus headi — Billings, pp. 228, fig. 236
1865
Graptolithus headi — Hall, pp. 8, fig. 6:8
1868
Graptolithus (Loganograptus) headi — Hall, pp. 174, fig. 4
1868
Tetragraptus headi — Nicholson, pp. 131
1872
Tetragrapsus headi — Nicholson, pp. 66, fig. 36
1898
Tetragraptus headi — Elles, pp. 486, fig. 11
1902
Tetragraptus headi — Elles et Wood, pp. 59, fig. 5:3a-b
1912
Tetragraptus cf. headi — Hoek, pp. 226, fig. 12:6
1947
Tetragraptus headi (Hall) — Ruedemann, pp. 301, fig. 51:33