Nannotetraster insignitus Martini, 1960
Martini, E., 1960. Braarudosphaeriden, Discoasteriden und verwandte formen aus dem Rupelton des Mainzer Beckens. Notizbl. hess. L-Amt Bodenfoch. 88, 65-87.
Varol, O. 2025. A practical guide to optical studies of calcareous nannofossils. Grzybowski Foundation Special Publication, 29, 222 pp.
Nannotetraster insignitus
Martini, 1960
Middle Eocene
Horsarrieu (Marniere de Sourbet) south of St Sever, France