PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Plocostoma

Gastropoda - Murchisoniina - Gosseletinidae

Taxonomy

Pleurotomaria (Plocostoma) was named by Gemmellaro (1889). Its type is Pleurotomaria (Plocostoma) neumayri.

It was reranked as Plocostoma by Knight (1937), Sepkoski (2002), Wagner (2023).

It was assigned to Pleurotomaria by Gemmellaro (1889); to Pleurotomarioidea by Knight (1937); to Archaeogastropoda by Sepkoski (2002); and to Glabrocingulides by Wagner (2023).

Subtaxa

P. josephinia, P. neumayri, P. piazzii

Synonymy list

Year	Name and author
1889	Pleurotomaria (Plocostoma) Gemmellaro p. 168
1937	Plocostoma Knight p. 712
2002	Plocostoma Sepkoski
2023	Plocostoma Wagner p. G1818

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Gastropoda

Rank	Name	Author
subclass	Orthogastropoda
order	Murchisoniina
superfamily	Eotomarioidea
family	Gosseletinidae
subfamily	Gosseletininae
subtribe	Glabrocingulides
genus	Plocostoma	()

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.

G. †Plocostoma Gemmellaro 1889

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†Plocostoma josephinia Gemmellaro 1889

†Plocostoma neumayri Gemmellaro 1889

†Plocostoma piazzii Gemmellaro 1889

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	10	12.0	6.00	20.0	12.0	3.81

Composition:

aragonitef

Entire body:

yesf

Adult length:

10 to < 100f

Adult width:

10 to < 100f

Ribbing:

minorf

Environment:

coastal, marineo

Locomotion:

slow-movingf

Life habit:

epifaunalf

Diet:

detritivoref

Vision:

limitedf

Created:

2009-06-11 17:54:14

Modified:

2025-08-08 09:12:49

Source: f = family, o = order

References: Hendy 2009, Bambach et al. 2007

Age range: Wordian or 266.90000 to 264.28000 Ma

Collections (3 total)

Time interval	Ma	Country or state	Original ID and collection number
Wordian	266.9 - 264.28	Italy	Pleurotomaria josephinia (108675) Pleurotomaria josephinia, Pleurotomaria neumayri, Pleurotomaria piazzii (108672) Pleurotomaria josephinia, Pleurotomaria piazzi (233340)