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Pterolabrella cingulatus

Gastropoda - Vitrinellidae

Taxonomy
Circulus cingulatus was named by Bartrum (1919). Its type specimen is Bartrum Collection, a shell, and it is a 3D body fossil. Its type locality is Kaawa Creek, which is in an Opoitian marine sandstone in the Kaawa Formation of New Zealand.

It was recombined as Elachorbis cingulata by Laws (1940); it was recombined as Pterolabrella cingulatus by Maxwell (1969).

Synonymy list
YearName and author
1919Circulus cingulatus Bartrum p. 97 figs. Plate VII, figs. 3 and 4
1940Elachorbis cingulata Laws
1969Pterolabrella cingulatus Maxwell

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classGastropoda
RankNameAuthor
subclassCaenogastropoda(Cox 1959)
—Sorbeoconcha(Ponder and Lindberg 1997)
—Hypsogastropoda(Ponder and Lindberg 1997)
superfamilyTruncatelloideaGray 1840
familyVitrinellidaeBush 1897
genusPterolabrellaMaxwell 1969
speciescingulatus()

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.

†Pterolabrella cingulatus Bartrum 1919
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Diagnosis
ReferenceDiagnosis
J. A. Bartrum 1919Very small, umbificate, almost discoidal shell, coiled in a very flat spiral. Whorls 3! or 4, very rapidly increasing, the protoconch smooth, the rest sculptured by prominent spiral, angular, sharply elevated raised bands : 5 of these are visible between the sutures on penultimate whorl, 15 on bodywhorl, regularly distributed, about 8 on basal portion, but absent from umbilicus. Interspaces approximately equal in width to the ridges, striated strongly by closely spaced transverse growth-hnes, which alone ornament umbilicus.

Aperture somewhat incomplete, apparently circular, with a minute posterior sinus. Outer lip partially incomplete in holotype, moderately sharp, slightly crenate externally owing to spiral sculpture. Inner -lip fairly solid, forming partial margin to the umbilicus; this latter not widely open and showing no coiling of whorls.
Measurements
No measurements are available
Composition: aragonitec
Locomotion: actively mobilec
Life habit: epifaunalc
Vision: limitedc
Created: 2009-09-10 07:56:06
Modified: 2009-09-10 09:56:06
Source: f = family, c = class
References: Kiessling 2004, Hendy et al. 2009

Age range: Opoitian or 5.33300 to 3.70000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Opoitian5.333 - 3.7New Zealand Circulus cingulatus (type locality: 178215)