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Gastropoda - Architectibranchia - Cylindrobullinidae

Conactaeon was named by Meek (1863) [Sepkoski's age data: J Plie]. It is not extant. Its type is Conus cadomensis.

It was reranked as Cylindrobullina (Conactaeon) by Haas (1953).

It was assigned to Euconactaeon by Meek (1863); to Cylindrobullina by Haas (1953); to Acteonidae by Fischer et al. (2002); and to Cylindrobullinidae by Gründel and Nützel (2012).

Synonymy list
YearName and author
1863Conactaeon Meek
1953Cylindrobullina (Conactaeon) Haas p. 269
2002Conactaeon Fischer et al.
2012Conactaeon Gründel and Nützel pp. 38 - 39

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EubilateriaAx 1987
classGastropodaCuvier 1797
orderArchitectibranchiaHaszprunar 1985
superfamilyActeonoidead'Orbigny 1835
familyCylindrobullinidaeWenz 1947
genusConactaeonMeek 1863

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

J. Gründel and A. Nützel 2012The shell is biconical with heterostrophic protoconch. The spire is distinctly elevated and gradate. The whorls have a nearly horizontal subsutural ramp which is demarcated from the flanks by a sharp angulation. The whorls taper abapically so that the base is reversed conical. The flanks are straight to slightly convex. The shell is smooth or has spiral furrows. The aperture is elongated and narrow. It is demarcated by the adapical ramp and somewhat broadened abapically. The shell lacks columellar folds. The growth lines are weakly prosocyrt on the flanks and opisthocyrt on the ramp.