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Protodolium

Gastropoda - Cycloneritimorpha - Neritopsidae

Taxonomy
Protodolium was named by Wilckens (1922) [Sepkoski's age data: K Maes].

It was assigned to Neritopsidae by Stilwell (1994); and to Neotaenioglossa by Sepkoski (2002).

Synonymy list
YearName and author
1922Protodolium Wilckens pp. 18-20
1994Protodolium Stilwell pp. 3 - 5
2002Protodolium Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
RankNameAuthor
classGastropodaCuvier 1797
subclassNeritimorpha
orderCycloneritimorpha
orderNeritoina(Rafinesque 1815)
superfamilyNeritopsoidea
familyNeritopsidaeGray 1847
genusProtodoliumWilckens 1922

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. D. Stilwell 1994Shell medium- to large-sized, moderately thick and solid, subglobose; spire low, moderately obtuse, of at least three flat-sided to gently convex whorls; mean spire angle ranging from about 73°-112°; protoconch obtusely conical to slightly domed of two smooth whorls; growth lines orthocline; last whorl moderately to greatly inflated, convex, sculpture variable, predominantly spiral of strong, raised, flattened, wide cords separated by deep furrows and weak to moderately collabral strong growth lines; some specimens with axial sculpture and blunt tubercles; penultimate whorl with two or three spiral cords; umbilicus very shallow; columella concave adapically; abapical portion of inner lip slightly reflected; inductura moderately thick, narrow, thinning to a variably broad to narrow glaze in parietal region; aperture holostomatous, broadly ovate to subovate.