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Palliseria longwelli

Gastropoda - Euomphalina - Macluritidae

Taxonomy
Mitrospira longwelli was named by Kirk (1930). Its type specimen is USNM 80840, a shell, and it is a 3D body fossil. Its type locality is Outcrops just west of summit on Alamo road south of Sheep Playa, which is in a Whiterockian carbonate limestone in the Antelope Valley Formation of Nevada. It is the type species of Mitrospira.

It was recombined as Palliseria longwelli by Runnegar (1981).

Synonymy list
YearName and author
1930Mitrospira longwelli Kirk pp. 1 - 5 figs. pl. 1 f. 1-3; pl. 2 f. 1-2; pl. 3 f. 1-5
1981Palliseria longwelli Runnegar figs. f. 3A-C

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classGastropoda
subclassEogastropoda
orderEuomphalina
superfamilyMacluritoidea
familyMacluritidae()
genusPalliseria
specieslongwelli()

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.

Palliseria longwelli Kirk 1930
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Diagnosis
ReferenceDiagnosis
E. Kirk 1930The genus as known is characterized by individuals of large size. The lower side of the shell is produced into a fairly high spire, while the upper side shows a wide umbilicus. The relative height of the spire is variable, due to greater or less overlap of the whorls on those preceding. The umbilicus is wide and open, the tubular cavity extending to the apex of the spire. The upper free margin of the whorls next the umbilicus is subangular. As shown by the growth lines and a fairly perfect aperture, this keel marks the apex of a deep reentrant notch. The keel is then considered the probable equivalent of the notch keel of the typical Pleurotomarids. An interesting feature of the genus is a progressive filling of the living chamber by secondary deposits of lime. This is noted in the description of the species and shows clearly in the section figured. The deposit is closely comparable with the secondary filling of the older camerae of certain cephalopods.