PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Amaea trifolia

Gastropoda - Epitoniidae

Taxonomy

Amaea trifolia was named by Squires and Saul (2003). Its type specimen is LACMIP 12991 and is a 3D body fossil. Its type locality is UCLA loc. 4217, Clover Creek, which is in a Santonian marine sandstone in the Redding Formation of California.

Sister species lacking formal opinion data

A. delongchampsi, A. hassani, A. macula, A. texana, A. thielei, A. triplicata, A. bronni, A. decussata, A. grignonensis, A. perangusta, A. geniculata, A. triplicata, A. dupiniana, A. paleocaenica, A. brevicula, A. niasensis, A. suroclathrata, A. newtoni, A. sculptata, A. texana, A. dickersoni, A. macula, A. macula, A. subreticula, A. subreticulata

Synonymy list

Year	Name and author
2003	Amaea trifolia Squires and Saul p. 28 figs. Figures 12-14

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

Rank	Name	Author
class	Gastropoda
subclass	Caenogastropoda	(Cox 1959)
superfamily	Epitonioidea	(Berry 1910)
family	Epitoniidae	Berry 1910
genus	Amaea	Adams and Adams 1853
species	trifolia

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.

†Amaea trifolia Squires and Saul 2003

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Diagnosis

Reference	Diagnosis
R. L. Squires and L. R. Saul 2003	An Amaea with axial ribs strong, closely spaced, and reflected leftward near posterior suture. Spiral ribs weak, moderately widely spaced, not crossing axial ribs. Subsutural rib and sulcus posterior to subsutural rib. Basal keel weak, and weak axial ribs crossing onto basal disk.

Measurements

No measurements are available

Composition:

aragonitef

Composition 2:

low Mg calcitef

Locomotion:

slow-movingf

Life habit:

low-level epifaunalf

Diet:

carnivoref

Vision:

limitedc

Created:

2007-02-05 23:13:43

Modified:

2011-09-22 17:20:39

Source: f = family, c = class

References: Beu et al. 1990, Kiessling 2004

Age range: Santonian or 85.70000 to 83.60000 Ma

Collections (2 total)

Time interval	Ma	Country or state	Original ID and collection number
Late/Upper Santonian	85.7 - 83.6	USA (California)	Amaea trifolia (type locality: 215319)
Santonian	85.7 - 83.6	USA (California)	Amaea trifolia (215307)