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Yoldia duprei

Bivalvia - Protobranchia - 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.

Synonymy list
YearName and author
1922Yoldia duprei Weaver and Palmer p. 7 figs. pl. 10, figs. 2, 7

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
RankNameAuthor
orderProtobranchiaPelseneer 1889
superorderNuculaniformiiCarter et al. 2000
orderNuculanida(Carter et al. 2000)
superfamilyNuculanoideaAdams and Adams 1858
familyYoldiidaeHabe 1977
genusYoldiaMöller 1842
speciesduprei

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.

Diagnosis
ReferenceDiagnosis
C. E. Weaver and K. Palmer 1922Shell 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.