Original Description of Drepanocheilus (Tulochilus) bensoni by Finlay & Marwick, 1937, p. 63:
- "The spire-whorls are angled somewhat below the middle and have a fairly steep, straight shoulder, which bears about 16 blunt tubercles, which are inclined to be obliquely extended on early whorls. The body-whorl has a strong keel issuing from the line of suture, but stopping suddenly at the base of the wing. The whole surface bears fine, regular, close spiral threads, about 20 on the spire-whorls and 22 on the body-whorl above the lower keel, which bears about 4 spirals. The base has about 4 spiral cords with several fine spiral threads between. The inner lip bears a callus pad with a sharply defined, thick, outer margin."
Locus typicus: Boulder Hill, Dunedin, Otago Region, South Island, New Zealand
Stratum typicum: Paleocene
Measurements: height 11 mm, width 8 mm
Drepanochilus (Tulochilus) bensoni Finlay & Marwick, 1937; Holotype; Paleocene; Boulder Hill, near Dunedin, Otago Region, South Island, New Zealand; Coll. Auckland Museum no. AK 70253; Copyright Auckland Museum