PBDB Taxon

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

Yoldia duprei

Bivalvia - Nuculanida - Yoldiidae

Taxonomy

Yoldia duprei was named by Weaver and 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.

Sister species lacking formal opinion data

Y. breweri, Y. clallamensis, Y. emersoni, Y. frater, Y. leurovata, Y. longa, Y. multiconcentrica, Y. oblongoides, Y. palachei, Y. praeposneri, Y. scitula, Y. septariana, Y. sobrina, Y. soror, Y. subacuta, Y. franciscoi, Y. siliqua, Y. caudata, Y. kovatschensis, Y. posneri

Synonymy list

Year	Name and author
1922	Yoldia duprei Weaver and Palmer p. 7 figs. pl. 10, figs. 2, 7

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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	Yoldiidae	Habe 1977
genus	Yoldia	Möller 1842
species	duprei

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.

†Yoldia duprei Weaver and Palmer 1922

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Diagnosis

Reference	Diagnosis
C. E. Weaver and K. Palmer 1922	Shell small, plump, and subelongate in outline; inequilateral, beaks situated not quite a third of the distance from the anterior end; ventral and dorsal margins nearly parallel ; anterior dorsal margin sloping at about an angle of 10 from the dorsal margin, rounded below into the ventral margin which is only slightly rounded, posterior end extends upward at about an angle of 40 with the ventral margin, posterior terminating at the dorsal margin in a point; posterior dorsal end concave; lunule faintly developed; escutcheon more deeply impressed; surface smooth except for the concentric growth lines which are fine and delicate; shell with a beautiful polish; outline of the teeth seen tnrough the shell in the cardinal region.