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Plethospira cassina

Gastropoda - Murchisoniina - Hormotomidae

Taxonomy
Holopea cassina was named by Whitfield (1886). It is not a trace fossil. Its type locality is 227 - Promonotory on west end of Fort Cassin, Lake Champlain., which is in a Cassinian carbonate limestone in the Fort Cassin Formation of Vermont.

It was recombined as Plethospira cassina by Ulrich and Scofield (1897), Fortey and Peel (1990) and Wagner (2023).

Synonyms
Synonymy list
YearName and author
1886Holopea cassina Whitfield p. 310 figs. pl. 25 f. 6-7
1897Plethospira cassina Ulrich and Scofield p. 1009 figs. f. 7a
1968Plethospira subangulata Flower pp. 32 - 33 figs. pl. 6 f. 36; pl. 7 f. 9-10
1990Plethospira cassina Fortey and Peel p. 28
2023Plethospira cassina Wagner p. 1977

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classGastropoda
subclassOrthogastropoda
orderMurchisoniina
superfamilyMurchisonioidea()
familyHormotomidae
genusPlethospira
speciescassina()

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.

†Plethospira cassina Whitfield 1886
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Invalid names: Plethospira subangulata Flower 1968 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: aragoniteg
Entire body: yesg
Adult length: 10 to < 100g
Adult width: 10 to < 100g
Adult height: 10 to < 100g
Folds: noneg
Ribbing: minorg
Spines: noneg
Internal reinforcement: noneg
Locomotion: actively mobileg
Life habit: epifaunalg
Diet: carnivoreg
Vision: limitedo
Created: 2004-08-16 10:06:19
Modified: 2009-06-06 09:39:12
Source: g = genus, o = order
References: Wagner 2023, Bambach et al. 2007

Age range: base of the Cassinian to the top of the Stairsian or 482.30000 to 478.60000 Ma

Collections (7 total)


Time interval Ma Country or state Original ID and collection number
Stairsian485.4 - 478.6USA (New York) Plethospira subangulata (289)
Cassinian482.3 - 470.0USA (Minnesota) Plethospira cassina (56645)
Cassinian482.3 - 470.0USA (Missouri) Plethospira cassina (75522 75552 75561)
Cassinian482.3 - 470.0Canada (Newfoundland and Labrador) Plethospira cassina (133140)
Cassinian482.3 - 470.0USA (Vermont) Holopea cassina (154944)