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Euconactaeon

Gastropoda - Architectibranchia - Cylindrobullinidae

Taxonomy
Euconactaeon was named by Meek (1863) [Sepkoski's age data: J Sine J Plie]. It is not extant.

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

It was assigned to Cylindrobullina by Haas (1953); to Cephalaspida by Sepkoski (2002); and to Cylindrobullinidae by Gründel and Nützel (2012).

Synonymy list
YearName and author
1863Euconactaeon Meek
1953Cylindrobullina (Euconactaeon) Haas p. 276
2002Euconactaeon Sepkoski, Jr.
2012Euconactaeon Gründel and Nützel p. 39

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
RankNameAuthor
classGastropodaCuvier 1797
subclassHeterostropha
orderArchitectibranchiaHaszprunar 1985
superfamilyActeonoidead'Orbigny 1835
familyCylindrobullinidaeWenz 1947
genusEuconactaeonMeek 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.

Diagnosis
ReferenceDiagnosis
J. Gründel and A. Nützel 2012Euconactaeon has a heterostrophic protoconch. Its spire is not elevated but plane or concave. The transition from the flanks to the spire is sharply or rounded angular. The shell tapers abapically so it is reversed conical. The aperture is narrow and elongated, somewhat widened and rounded abapically. The shell is smooth or has spiral striae. It lacks columellar folds.