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Conactaeon
Taxonomy
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).
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).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1863 | Conactaeon Meek |
| 1953 | Cylindrobullina (Conactaeon) Haas p. 269 |
| 2002 | Conactaeon Fischer et al. |
| 2012 | Conactaeon Gründel and Nützel pp. 38 - 39 |
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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.
G. †Conactaeon Meek 1863
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†Conactaeon brachyteles Cossmann 1895
†Conactaeon cadomensis Eudes-Deslongchamps 1843
†Conactaeon macrospira Cossmann 1895
†Conactaeon peruviana Haas 1953
†Cylindrobullina (Conactaeon) tilarniocensis Haas 1953
†Euconactaeon caumonti Eudes-Deslongchamps 1843
†Euconactaeon concavus Lyell 1840
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Gründel and A. Nützel 2012 | The 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. |
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 78 | 2.42 | 1.12 | 5.78 | 2.35 | 0.907 |
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| Source: superf = superfamily, c = class | |||||
| References: Kiessling 2004, Hendy et al. 2009 | |||||
Age range: base of the Norian to the top of the Sinemurian or 227.30000 to 192.90000 Ma
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Norian | Peru | C. peruviana (144482) | |
| Norian - Rhaetian | Peru | Cylindrobullina peruviana (68136) | |
| Rhaetian | Peru | Cylindrobullina decorata (68147) Cylindrobullina decorata, Cylindrobullina peruviana (68119) Cylindrobullina decorata, Cylindrobullina peruviana, Cylindrobullina tilarniocensis (68116) Cylindrobullina peruviana (68096 68148) Cylindrobullina peruviana, Cylindrobullina tilarniocensis (68144) | |
| Sinemurian | Italy | C. sp. (80016) |