PBDB Taxon

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

Acila (Truncacila) princeps

Bivalvia - Nuculida - Nuculidae

Taxonomy

Acila (Truncacila) princeps was named by Schenck (1943) [TYPE LOCALITY: CAS 69075, west side San Joaquin Valley, northern California (Late Campanian-Early Maastrichtian). TYPE REPOSITORY: CAS, California.]. Its type specimen is CAS 69075 and is a 3D body fossil. Its type locality is LSJU 2372, which is in a Maastrichtian marine sandstone in the Moreno Formation of California.

Sister species lacking formal opinion data

A. asachiensis, A. ashiyaensis, A. cobboldiae, A. elongata, A. gettisburgensis, A. insignis, A. kusiroensis, A. minima, A. mirabilis, A. parva, A. picturata, A. piura, A. pusilla, A. schumardi, A. tosaensis, A. trilineata, A. elongata, A. antefultoni, A. elongata, A. isthmica, A. kovatschensis, A. submariabilis, A. vengeriana, A. demessa, A. nakazimai, A. chausiensis, A. chicotana, A. enpirensis, A. ermani, A. eximia, A. gottschei, A. granulata, A. himenourensis, A. ilpinensis, A. incignis, A. insignis, A. isignis, A. longa, A. marujamensis, A. munda, A. nakazimai, A. nehalemensis, A. nehalemensis, A. oyamadensis, A. pecticostata, A. picturata, A. plana, A. pleschakovi, A. praevigilia, A. schomburgki, A. triangula, A. vereshagini, Truncacila korjakensis, Truncacila munda, Truncacila shimojimensis, Truncacila subdemessa, Truncacila yoshidai

Synonymy list

Year	Name and author
1943	Acila (Truncacila) princeps Schenck pp. 63-66 figs. pl. 8, figs. 1-4
2006	Acila (Truncacila) princeps Squires and Saul p. 98

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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	Nuculiformii	Dall 1889
order	Nuculida	(Dall 1889)
superfamily	Nuculoidea	(Gray 1824)
family	Nuculidae	Gray 1824
genus	Acila	Adams and Adams 1858
subgenus	Truncacila	Grant and Gale 1931
species	princeps

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.

†Acila (Truncacila) princeps Schenck 1943

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Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

aragonitef

Entire body:

yesf

Adult length:

1.0 to < 10f

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:

coastal, inner shelf, outer shelf, oceanicf

Locomotion:

facultatively mobilef

Life habit:

infaunalf

Diet:

deposit feederf

Diet 2:

suspension feederf

Vision:

blindc

Created:

2008-11-15 10:09:53

Modified:

2009-08-18 20:13:53

Source: f = family, c = class

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

Age range: Early/Lower Maastrichtian or 72.20000 to 66.00000 Ma

Collections (6 total)

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Maastrichtian	72.2 - 66.0	USA (California)	Acila princeps (66683)
Late/Upper Maastrichtian	72.2 - 66.0	USA (California)	Acila princeps (215291 220396)
Maastrichtian	72.2 - 66.0	USA (California)	Acila princeps (185632 type locality: 206374)
Maastrichtian	72.2 - 66.0	Mexico	Truncacila princeps (1372)