PBDB Taxon

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

Nuculana cowlitzensis

Bivalvia - Nuculanida - Nuculanidae

Taxonomy

Leda cowlitzensis was named by Weaver and Van Winkle Palmer (1922). Its type specimen is UW (unknown number), a shell, and it is a 3D body fossil. Its type locality is UW 329, which is in a Bartonian marine horizon in the Cowlitz Formation of Washington.

It was recombined as Nuculana cowlitzensis by Turner (1938).

Synonymy list

Year	Name and author
1922	Leda cowlitzensis Weaver and Van Winkle Palmer p. 6 figs. pl. 10, fig. 4
1938	Nuculana cowlitzensis Turner p. 42

Is something missing? Join the Paleobiology Database and enter the data

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

Rank	Name	Author
—	Eubivalvia
subclass	Protobranchia	(Pelseneer 1889)
superorder	Nuculaniformii	Carter et al. 2000
order	Nuculanida	(Carter et al. 2000)
superfamily	Nuculanoidea	Adams and Adams 1858
family	Nuculanidae	Adams and Adams 1858
genus	Nuculana	Link 1807
species	cowlitzensis	()

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.

†Nuculana cowlitzensis Weaver and Van Winkle Palmer 1922

show all | hide all

Diagnosis

Reference	Diagnosis
C. E. Weaver and K. Van Winkle Palmer 1922	Shell small and thin, sub-oval in outline ; posterior end rostrate and pointed ; anterior end regularly and broadly rounded, ventral margin curved, posterior end sloping at an angle of 30 to the ventral line terminating at the dorsal margin in a beak; posterior dorsal margin directed downward and concave; lunule narrow and elongate, only slightly impressed and limited by a fine line ; escutcheon narrow and impressed ; surface ornamented with concentric ribbing which continues from the anterior margin, regularly to the rostrum, the ribs are numerous with only slight interspaces, they are prominent and have the appearance of slightly overlapping each other from the ventral region toward the ambones ; a faint groove extends from the beaks to the posterior point of the ventral margin, just back of which the concentric sculpture is somewhat obliterated except for faint lines of growth.

Measurements

No measurements are available

Composition:

aragonitef

Entire body:

yesf

Adult length:

1.0 to < 10f

Adult width:

1.0 to < 10f

Adult height:

1.0 to < 10f

Thickness:

thinf

Folds:

nonef

Ribbing:

minorf

Spines:

nonef

Internal reinforcement:

nonef

Ontogeny:

accretionf

Environment:

coastal, inner shelf, outer shelf, oceanicf

Locomotion:

facultatively mobilef

Life habit:

infaunalf

Diet:

deposit feederf

Diet 2:

suspension feederf

Vision:

blindc

Created:

2007-07-27 04:12:34

Modified:

2009-08-18 20:13:18

Source: f = family, c = class

References: Kiessling 2004, Aberhan et al. 2004

Age range: base of the Danian to the top of the Priabonian or 66.00000 to 33.90000 Ma

Collections (12 total)

Time interval	Ma	Country or state	Original ID and collection number
Danian - Thanetian	66.0 - 56.0	Russian Federation	Nuculana cowlitzensis (49981)
Lutetian - Bartonian	48.07 - 37.71	USA (Washington)	Nuculana cowlitzensis (43346)
Bartonian	41.03 - 37.71	USA (Oregon)	Nuculana cowlitzensis (200858 200859 200860 200868 201047)
Bartonian	41.03 - 37.71	USA (Washington)	Leda cowlitzensis (201124 201131) Nuculana cowlitzensis (203164)
Bartonian - Priabonian	41.03 - 33.9	Russian Federation	Nuculana cowlitzensis (50139)
Priabonian	37.71 - 33.9	USA (Washington)	Nuculana cowlitzensis (202067)