PBDB Taxon

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

Arca biangula

Bivalvia - Arcida - Arcidae

Taxonomy

Arca biangula was named by Lamarck (1805) [DISTRIBUTION: Paleogene; Western Europe.]. It is not a trace fossil.

Sister species lacking formal opinion data

A. bellonii, A. bravoensis, A. cancellata, A. carinata, A. gurgitis, A. limatella, A. macnairyensis, A. montensis, A. nana, A. pakistanica, A. pergracilis, A. securiculata, A. tailleburgensis, A. triasina, A. halmyrus, A. montensis, A. fruthi, A. stillicidum, A. mikkula, A. waltonia, A. fracta, A. gabrielis, A. veatchi

Synonymy list

Year	Name and author
1805	Arca biangula Lamarck p. 219 figs. pl. 24, fig. 5
1904	Arca biangula Cossmann and Pissarro figs. pl. 35, figs. 110-2
1980	Arca biangula Iqbal p. 23

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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	Arcinae	Lamarck 1809
genus	Arca
species	biangula	Lamarck 1805

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.

†Arca biangula Lamarck 1805

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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:

stationaryg

Attached:

yesg

Life habit:

epifaunalg

Diet:

suspension feederg

Vision:

limitedf

Created:

2004-02-29 17:09:41

Modified:

2009-09-09 11:04:20

Source: g = genus, f = family

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

Age range: base of the Lutetian to the top of the Langhian or 47.80000 to 13.82000 Ma

Collections (12 total)

Time interval	Ma	Country or state	Original ID and collection number
Lutetian	47.8 - 41.3	United Kingdom (England)	Arca biangula (8125)
Bartonian	41.3 - 38.0	France	Arca biangula (78567)
Bartonian	41.3 - 38.0	France (Oise)	Arca biangula (3494)
Priabonian	38.0 - 33.9	Bulgaria	Arca biangula (102289)
Priabonian	38.0 - 33.9	Romania	Arca biangula (101967)
Priabonian	38.0 - 33.9	Italy	Arca biangula (78565)
Early/Lower Oligocene	33.9 - 28.4	Pakistan	Arca biangula (77450)
Oligocene	33.9 - 23.03	Italy	Arca biangula (86952)
Oligocene	33.9 - 23.03	Bulgaria (Kurdzhali)	Arca biangula (102287)
Chattian	28.1 - 23.03	Hungary	Arca biangula (8211)
Burdigalian	20.44 - 15.97	Italy	Arca biangula (178108)
Langhian	15.97 - 13.82	Italy	Arca biangula (178116)