PBDB Taxon

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

Scapharca (Cunearca) rivulata

Bivalvia - Arcida - Arcidae

Taxonomy

Arca rivulata was named by Wiedey (1928). Its type specimen is SDSNH 20, a valve, and it is a 3D body fossil. Its type locality is LSJU loc. 432, which is in a Miocene coastal sandstone in the Temblor Formation of California.

It was recombined as Anadara (Cunearca) rivulata by Reinhart (1943); it was recombined as Scapharca (Cunearca) rivulata by Moore (1983).

Sister species lacking formal opinion data

Anadara chavezi, Anadara eumeces, Anadara filicata, Anadara guajiraensis, Anadara megerata, Anadara bonneti, Anadara castellata, Anadara egleri, Anadara guajirensis, Anadara ommaensis, Anadara placata, Anadara sanctidavidis, Anadara setoensis, Anadara subcrenata, Anadara suzukii, Anadara veatchi, Arca aequitorialis, Arca pilula, Arca thalia, Arca buenavistana, Arca charanensis, Arca golfoyaquensis, Arca grandis, Arca inequilateralis, Arca singewaldi, Arca subcrenata, Arca zapotalensis, Cunearca megerata, S. agraria, S. agronomica, S. castellata, S. chiriquiensi, S. chordicosta, S. ferruginea, S. gendingensis, S. grandis, S. japonica, S. junghuhni, S. kakehataensis, S. losguemadica, S. natalensis, S. paraensis, S. pertenuicostata, S. praenatalensis, S. quayubinica, S. recondita, S. staminata, S. suzukii, S. textilicostata, S. campechiensis, S. incongrus, S. paraensis, S. gedinganensis, S. nannodes, S. suessi, S. textilicostata

Synonyms

Arca galei was named by Wiedey (1928). Its type specimen is SDSNH 21, a valve, and it is a 3D body fossil. Its type locality is LSJU loc. 427, Benedict Canyon, which is in a Miocene coastal horizon in the Vaqueros Formation of California.

It was synonymized subjectively with Scapharca (Cunearca) rivulata by Moore (1983).

Synonymy list

Year	Name and author
1928	Arca rivulata Wiedey p. 128 figs. Plate 13, figure 3
1928	Arca galei Wiedey p. 129 figs. Plate 13, figure 8
1943	Anadara (Cunearca) rivulata Reinhart p. 68 figs. PI. 5, figs. 3, 5-8
1983	Scapharca (Cunearca) rivulata Moore p. A45 figs. Plate 9, figure 13

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Bivalvia
—	Eubivalvia
subclass	Autobranchia	(Groblen 1894)

Rank	Name	Author
infraclass	Pteriomorphia	(Beurlen 1944)
—	Ostreomorphi	Ferussac 1822
—	Arcioni	Gray 1854
order	Arcida	(Stoliczka 1871)
superfamily	Arcoidea	(Lamarck 1809)
family	Arcidae	Lamarck 1809
subfamily	Anadarinae	Reinhart 1935
genus	Scapharca	Gray 1847
subgenus	Cunearca	(Dall 1898)
species	rivulata	()

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.

†Scapharca (Cunearca) rivulata Wiedey 1928

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Invalid names: Arca galei Wiedey 1928 [synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

aragonitef

Entire body:

yesf

Adult length:

10 to < 100f

Adult width:

10 to < 100f

Adult height:

10 to < 100f

Thickness:

intermediatef

Folds:

minorf

Ribbing:

majorf

Spines:

nonef

Internal reinforcement:

nonef

Ontogeny:

accretionf

Environment:

lagoonal, coastal, inner shelf, outer shelf, oceanic, brackish, freshwaterf

Locomotion:

facultatively mobileg

Attached:

yesf

Life habit:

infaunalg

Diet:

suspension feederg

Vision:

limitedf

Created:

2009-09-09 13:17:02

Modified:

2009-09-09 15:17:02

Source: g = genus, f = family

References: Mikkelsen and Bieler 2008, Sanchez Roig 1926

Age range: base of the Langhian to the top of the Late/Upper Miocene or 15.98000 to 5.33300 Ma

Collections (3 total)

Time interval	Ma	Country or state	Original ID and collection number
Langhian	15.98 - 13.82	USA (California)	Anadara rivulata (37530)
Middle Miocene	15.98 - 11.63	USA (California)	Arca rivulata (type locality: 220066)
Late/Upper Miocene	11.63 - 5.333	USA (California)	Arca galei (220068)