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Levizygopleura williamsi

Gastropoda - Pseudozygopleuridae

Taxonomy
Pseudozygopleura (Pseudozygopleura) williamsi was named by Knight (1930) [Pseudozygopleura (Pseudozygopleura) williamsi Knight 1930]. It is not a trace fossil. Its type locality is SL-1. Headwaters of Feefee Creek, north of Olive St. & west of Lindberg Blvd., 1.5 km northwest of Stratmann (Olivette), which is in a Moscovian offshore shale in the Appanoose Formation of Missouri. It is the type species of Levizygopleura.

It was recombined as Pseudozygopleura williamsi by Yochelson and Saunders (1967) and Kulas and Batten (1997); it was recombined as Microptychis williamsi by Hoare and Sturgeon (1981) and Kues and Batten (2001); it was recombined as Levizygopleura williamsi by Bandel (2002) and Wagner (2023).

Synonymy list
YearName and author
1930Pseudozygopleura (Pseudozygopleura) williamsi Knight p. 36 figs. pl. 1 f. 5a-c
1967Pseudozygopleura williamsi Yochelson and Saunders p. 159
1981Microptychis williamsi Hoare and Sturgeon pp. 187 - 189 figs. pl. 1 f. 3-6; txt.f. 1B-C; table 1
1995Pseudozygopleura (Pseudozygopleura) williamsi Batten p. 30 figs. 41a-b
1997Pseudozygopleura williamsi Kulas and Batten p. 54
2001Microptychis williamsi Kues and Batten p. 80 figs. f. 15.14-15.15
2002Levizygopleura williamsi Bandel p. 124
2023Levizygopleura williamsi Wagner p. S5398

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classGastropoda
subclassCaenogastropoda(Cox 1959)
superfamilyZygopleuroidea
familyPseudozygopleuridae()
genusLevizygopleura
specieswilliamsi()

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.

†Levizygopleura williamsi Knight 1930
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Diagnosis
ReferenceDiagnosis
R. L. Batten 1995Elongate, conical, high-spired shells without adult ornament other than growth lines. Protoconch heterostrophic at about 90˚ from adult axis. Three postembryonic whorls have arcuate collabral costae with indication at midwhorl of spiral element. Adult whorl profile is slightly inflated with broad periphery low on whorl. Whorls embrace just below periphery on basal margin. Growth lines slightly arcuate. Anomphalus. Base evenly rounded.
Measurements
No measurements are available
Composition: aragonitec
Locomotion: actively mobilec
Life habit: epifaunalc
Vision: limitedc
Created: 2004-02-29 11:40:59
Modified: 2010-02-11 01:35:02
Source: c = class
Reference: Kiessling 2004

Age range: base of the Morrowan to the top of the Virgilian or 323.20000 to 298.90000 Ma

Collections (6 total)


Time interval Ma Country or state Original ID and collection number
Morrowan323.2 - 318.6USA (Texas) Pseudozygopleura williamsi (79966)
Moscovian315.2 - 307.0USA (Missouri) Pseudozygopleura williamsi (type locality: 69773)
Desmoinesian312.8 - 306.0USA (Missouri) Pseudozygopleura williamsi (69770)
Desmoinesian312.8 - 306.0USA (New Mexico) Microptychis williamsi (46536)
Desmoinesian312.8 - 306.0USA (Ohio) Microptychis williamsi (72004)
Virgilian303.7 - 298.9USA (New Mexico) Microptychis williamsi (146828)