PBDB Taxon

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

Yoldia (Kalayoldia) oregona

Bivalvia - Nuculanida - Yoldiidae

Taxonomy

Leda oregona was named by Shumard (1858) [DISTRIBUTION: Oligocene-Miocene; Oregon.]. It is not a trace fossil.

It was recombined as Nuculana oregona by Meek (1864); it was recombined as Neilo oregona by Conrad (1865); it was recombined as Yoldia (Cnesterium) oregona by Dall (1909); it was recombined as Yoldia (Portlandia) oregona by Etherington (1931) and Weaver (1942); it was recombined as Yoldia oregona by Grant and IV and Gale (1931); it was synonymized subjectively with Yoldia (Kalayoldia) tenuissima by Addicott (1973); it was recombined as Yoldia (Kalayoldia) oregona by Moore (1976), Moore (1983), Coan et al. (2000) and Hendy (2020).

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
1858	Leda oregona Shumard
1864	Nuculana oregona Meek pp. 5, 27
1865	Neilo oregona Conrad p. 153
1909	Yoldia (Cnesterium) oregona Dall p. 105 figs. pl. 19, fig. 4
1931	Yoldia (Portlandia) oregona Etherington p. 67 figs. Plate 1, figure 8
1931	Yoldia oregona Grant, IV and Gale p. 130
1942	Yoldia (Portlandia) oregona Weaver p. 49
1976	Yoldia (Kalayoldia) oregona Moore p. 44
1983	Yoldia (Kalayoldia) oregona Moore p. A24 figs. Plate 3, figures 11, 12
2000	Yoldia (Kalayoldia) oregona Coan et al. p. 113
2020	Yoldia (Kalayoldia) oregona Hendy

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

Rank	Name	Author
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
subgenus	Kalayoldia
species	oregona	(Shumard 1858)

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 (Kalayoldia) oregona Shumard 1858

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Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

aragonitef

Adult length:

10 to < 100f

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:

inner shelf, outer shelf, oceanicf

Locomotion:

facultatively mobileg

Life habit:

infaunalg

Diet:

deposit feederg

Vision:

blindc

Created:

2009-09-09 13:24:31

Modified:

2009-09-09 15:24:41

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

References: Mikkelsen and Bieler 2008, Aberhan et al. 2004, Sanchez Roig 1926

Age range: base of the Priabonian to the top of the Early/Lower Pliocene or 38.00000 to 3.60000 Ma

Collections (19 total)

Time interval	Ma	Country or state	Original ID and collection number
Priabonian	38.0 - 33.9	USA (Oregon)	Yoldia oregona (38935 38939 38997 38998 39003 39005 39029 39030 39036)
Rupelian	33.9 - 28.1	USA (Oregon)	Yoldia oregona (37816 37818 37819 37821)
Late/Upper Oligocene	28.4 - 23.03	USA (California)	Yoldia oregona (122273)
Chattian	28.1 - 23.03	USA (Oregon)	Yoldia oregona (37683 37687 37688)
Langhian	15.97 - 13.82	USA (California)	Yoldia oregona (206393)
Early/Lower Pliocene	5.333 - 3.6	USA (Oregon)	Yoldia oregona (71149)