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Pachecoa hornii

Bivalvia - Arcida - Arcidae

Taxonomy
Arca hornii was named by Gabb (1864). It is a 3D body fossil. Its type locality is UCMP 3578, east of Marsh Creek, which is in a Ypresian coastal sandstone in the Meganos Formation of California.

It was recombined as Halonanus hornii by Stewart (1930); it was recombined as Pachecoa (Pachecoa) hornii by Moore (1983); it was recombined as Halonanus horni by Nilsen (1987); it was recombined as Pachecoa hornii by Hendy (2020).

Sister species lacking formal opinion data

Synonymy list
YearName and author
1864Arca hornii Gabb p. 194 figs. PI. 30, Fig. 263
1927Arca hornii Hanna p. 272
1930Halonanus hornii Stewart pp. 79 - 80 figs. Plate 10, fig. 6
1983Pachecoa (Pachecoa) hornii Moore pp. A48 - A49 figs. Plate 10, figure 7
1987Halonanus horni Nilsen pp. 90, 91
2020Pachecoa hornii Hendy

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
Eubivalvia
subclassAutobranchia(Groblen 1894)
RankNameAuthor
infraclassPteriomorphia(Beurlen 1944)
OstreomorphiFerussac 1822
ArcioniGray 1854
orderArcida(Stoliczka 1871)
superfamilyArcoidea(Lamarck 1809)
familyArcidaeLamarck 1809
subfamilyNoetiinaeStewart 1930
tribeTrinacriini(MacNeil 1937)
genusPachecoaHarris 1919
specieshornii()

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.

Pachecoa hornii Gabb 1864
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Pachecoa (Pachecoa) hornii elusa Clark and Woodford 1927
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Diagnosis
No diagnoses are available