PBDB Taxon

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

Glycymeris pacifica

Bivalvia - Arcida - Glycymerididae

Taxonomy

Pectunculus pacificus was named by Anderson (1902).

It was recombined as Glycymeris pacificus by Anderson (1958); it was recombined as Glycymeris pacifica by Squires (2010).

Synonymy list

Year	Name and author
1902	Pectunculus pacificus Anderson p. 74 figs. Plate VII, Fig. 159
1958	Glycymeris pacificus Anderson p. 97 figs. Plate 18, figure 7
2010	Glycymeris pacifica Squires p. 898 figs. Figure 4, Table 1

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Bivalvia
—	Eubivalvia
subclass	Autobranchia	(Groblen 1894)

Rank	Name	Author
infraclass	Pteriomorphia	(Beurlen 1944)
—	Ostreomorphi	Ferussac 1822
—	Arcioni	Gray 1854
order	Arcida	(Stoliczka 1871)
superfamily	Arcoidea	(Lamarck 1809)
family	Glycymerididae	Newton 1922
subfamily	Glycymeridinae	Newton 1922
genus	Glycymeris	Da Costa 1778
species	pacifica	()

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.

†Glycymeris pacifica Anderson 1902

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Diagnosis

Reference	Diagnosis
R. L. Squires 2010	Shell size small, up to height 35 mm. Sub- circular to nearly circular. Valves lowly inflated. Radial ribs flattish, narrow, and commonly obscured by superimposed numerous radial striae. Cardinal area small. Taxodont teeth moderately small and moderately weak.

Measurements

No measurements are available

Composition:

aragonitef

Adult length:

10 to < 100f

Adult width:

10 to < 100f

Adult height:

10 to < 100f

Thickness:

thickf

Folds:

nonef

Ribbing:

majorf

Spines:

nonef

Internal reinforcement:

nonef

Ontogeny:

accretionf

Environment:

coastal, inner shelf, outer shelf, oceanicf

Locomotion:

facultatively mobileg

Life habit:

infaunalg

Diet:

suspension feederg

Vision:

blindc

Created:

2004-02-29 17:01:36

Modified:

2004-02-29 19:01:36

Source: g = genus, f = family, c = class

References: Aberhan et al. 2004, Mikkelsen and Bieler 2008

Age range: base of the Early/Lower Cenomanian to the top of the Turonian or 99.60000 to 89.80000 Ma

Collections (47 total)

Time interval	Ma	Country or state	Original ID and collection number
Cenomanian	100.5 - 93.9	USA (California)	Glycymeris pacifica (185726)
Early/Lower Cenomanian	99.6 - 93.5	USA (California)	Glycymeris pacifica (1799)
Turonian	93.9 - 89.8	USA (California)	Glycymeris pacifica (185440) Glycymeris pacificus (44213 62347 80928 80930 80931 80932 80934 167600 185390 185415 207519 207521 214077 215285 215618 215755 219081 220298 220299 220360 220930 220935 220936 220939 221083 222073 222076 222079 222080 222082 222085 222092 222093 222094)
Early/Lower Turonian	93.5 - 89.3	Canada (British Columbia)	Glycymeris pacificus (210491)
Late/Upper Turonian	93.5 - 89.3	USA (California)	Glycymeris pacificus (215284 215287 215288 215570 220313 220390 220932 220933 221121)