PBDB Taxon

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

Cucullaea cordiformis

Bivalvia - Arcida - Cucullaeidae

Taxonomy

Cucullaea cordiformis was named by Packard (1922). Its type specimen is UCMP 12311 and is a 3D body fossil. Its type locality is UCMP loc. 2158, Santa Ana Mountains, which is in a Turonian/Campanian marine horizon in California.

It was recombined as Cucullaea (Idonearca) cordiformis by Anderson (1958).

Sister species lacking formal opinion data

C. acuticarinata, C. antarctica, C. australis, C. ceres, C. clathrata, C. contracta, C. egertonianus, C. favrei, C. gabrielis, C. jaworskii, C. kipandeensis, C. mailleana, C. matheroniana, C. minchiahamplonensis, C. ornata, C. rothi, C. royei, C. sheikhfadli, C. texta, C. vulgaris, C. wadei, C. waihaoensis, C. woodsi, C. coxi, C. fuegunensis, C. aalensis, C. powersi, C. rothi, C. waihaoensis

Synonymy list

Year	Name and author
1922	Cucullaea cordiformis Packard p. 417 figs. Plate 24, figure 1
1958	Cucullaea (Idonearca) cordiformis Anderson p. 91

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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	Autobranchia	(Groblen 1894)
infraclass	Pteriomorphia	(Beurlen 1944)
—	Ostreomorphi	Ferussac 1822
—	Arcioni	Gray 1854
order	Arcida	(Stoliczka 1871)
superfamily	Arcoidea	(Lamarck 1809)
family	Cucullaeidae	Stewart 1930
genus	Cucullaea	Lamarck 1801
species	cordiformis

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.

†Cucullaea cordiformis Packard 1922

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Diagnosis

Reference	Diagnosis
E. L. Packard 1922	Shell large, trigonal in outline, equivalve, nearly equilateral, height greater than length; widely separated, with narrow acute, incurving beaks. Anterior extremity broken, probably rounded, resembling the broadly rounded posterior end; base arcuate. Umbones very prominent.. Dorsal area broad. The chevrons marked by widely separated diverging lines . Hinge line relatively short. Iength, 64 min.; height, 75 mm.; diameter, 70mm.