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Acila (Truncacila) demessa

Bivalvia - Nuculida - Nuculidae

Taxonomy
Acila demessa was named by Finlay (1927) [DISTRIBUTION: Cretaceous; California.]. It is not a trace fossil.

It was recombined as Acila (Truncacila) demessa by Schenck (1936) and Squires and Saul (2006).

Synonymy list
YearName and author
1927Acila demessa Finlay p. 522
1930Acila demessa Stewart p. 46 figs. Plate 3, fig. 6
1936Acila (Truncacila) demessa Schenck p. 48
2006Acila (Truncacila) demessa Squires and Saul p. 93

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
—Eubivalvia
RankNameAuthor
subclassProtobranchia(Pelseneer 1889)
superorderNuculiformiiDall 1889
orderNuculida(Dall 1889)
superfamilyNuculoidea(Gray 1824)
familyNuculidaeGray 1824
genusAcilaAdams and Adams 1858
subgenusTruncacilaGrant and Gale 1931
speciesdemessa(Finlay 1927)

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.

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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: base of the Coniacian to the top of the Early/Lower Maastrichtian or 89.80000 to 66.00000 Ma

Collections (36 total)


Time interval Ma Country or state Original ID and collection number
Coniacian89.8 - 86.3USA (California) Acila demessa (44214 44232)
Santonian86.3 - 83.6USA (California) Acila demessa (86956 185391)
Campanian83.6 - 72.1USA (California) Acila demessa (44274 80945 80946 168012)
Early/Lower Campanian83.5 - 70.6USA (California) Acila demessa (44277)
Late/Upper Campanian83.5 - 70.6USA (California) Acila demessa (1513 1515 1545 1547 72057 86794 167703 167704 167705 185168)
Middle Campanian83.5 - 70.6USA (California) Acila demessa (144763 144773 185174 220908 220910 220911 220912 220916 221105 221106 221107)
Late/Upper Campanian - Early/Lower Maastrichtian83.5 - 66.0USA (California) Acila demessa (44268)
Maastrichtian72.1 - 66.0USA (California) Truncacila demessa (1354)
Maastrichtian72.1 - 66.0Mexico Truncacila demessa (1372)
Early/Lower Maastrichtian70.6 - 66.0USA (California) Acila demessa (83789 224893 225632)