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Lutema

Gastropoda - Neogastropoda - Turridae

Taxonomy
Lutema was named by Stephenson (1941) [Sepkoski's age data: K Camp K Maes-l Sepkoski's reference number: 909].

It was reranked as Amuletum (Lutema) by Kosnik (2002).

It was assigned to Turritidae by Stephenson (1941); to Amuletum by Kosnik (2002); to Neogastropoda by Sepkoski (2002); and to Turridae by Bandel (1993) and Kaim and Beisel (2005).

Synonymy list
YearName and author
1941Lutema Stephenson p. 373
1993Lutema Bandel p. 44
2002Amuletum (Lutema) Kosnik
2002Lutema Sepkoski, Jr.
2005Lutema Kaim and Beisel p. 52

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
RankNameAuthor
classGastropodaCuvier 1797
subclassProsobranchiaMilne-Edwards 1848
superorderCaenogastropodaCox 1959
orderNeogastropodaThiele 1929
superfamilyConoidea(Rafinesque 1815)
familyTurridaeSwainson 1840
genusLutema

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
L. W. Stephenson 1941Shell small, turreted. Spire about equal in height to the length of the aperture. Spiral angle 32 to 42 degrees. Protoconch of medium size, smooth, naticoid, coiled 2 or 3 times. Shoulder rather broad, broadly excavated, moderately steep, limited below by an obtuse shoulder angle. Body whorl broadly rounded on the periphery, broadly excavated on the base. Axials short, oblique, numbering 13 to 20, and may or may not be noded on the shoulder angle. Spirals numerous, narrow, weak, and may be practically wanting on the inflated part of the whorls.

Aperture long; outer lip broadly arched and thin; inner lip forming a thin callus on the parietal wall; anal notch of moderate depth, sharply rounded at inner end; canal narrow, deep, and straight or only slightly twisted.