PBDB Taxon

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

Acteocina infrequens

Gastropoda - Opisthobranchiata - Cylichnidae

Taxonomy

Bulla (Tornatina) infrequens was named by Adams (1852). It is extant.

It was recombined as Retusa (Acteocina) infrequens by Grant and IV and Gale (1931); it was recombined as Acteocina infrequens by Skoglund (2002), Hendy (2021).

Sister species lacking formal opinion data

A. inconspicua, A. rusa, A. sphalera, A. tabogaensis

Synonyms

Tornatina tumida was named by Olrdoyd (1921). It is extant. Its type locality is Nob Hill cut, San Pedro, which is in a Pleistocene marine horizon in the San Pedro Sand Formation of California.

It was recombined as Acteocina tumida by Oldroyd (1925); it was recombined as Retusa (Acteocina) tumida by Grant and IV and Gale (1931); it was synonymized subjectively with Acteocina infrequens by Hendy (2021).
Acteocina anomala was named by Willett (1945). It is a 3D body fossil.

It was synonymized subjectively with Acteocina infrequens by Hendy (2021).
Acteocina magdalenensis was named by Dall (1919). It is extant.

It was synonymized subjectively with Acteocina infrequens by Hendy (2021).

Synonymy list

Year	Name and author
1852	Bulla (Tornatina) infrequens Adams p. 520
1919	Acteocina magdalenensis Dall p. 296
1921	Tornatina tumida Olrdoyd p. 116 figs. pl. 5, fig. 8
1925	Acteocina tumida Oldroyd p. 9
1925	Tornatina tumida Olrdoyd
1931	Retusa (Acteocina) infrequens Grant, IV and Gale p. 448
1931	Retusa (Acteocina) tumida Grant, IV and Gale p. 449
1945	Acteocina anomala Willett p. 28
2002	Acteocina infrequens Skoglund p. 204
2021	Acteocina infrequens Hendy

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca

Rank	Name	Author
class	Gastropoda
order	Opisthobranchiata	(Milne-Edwards 1848)
order	Cephalaspidea	Fischer 1883
superfamily	Philinoidea	Gray 1850
family	Cylichnidae	Adams 1850
genus	Acteocina	Gray 1847
species	infrequens	(Adams 1852)

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.

Acteocina infrequens Adams 1852

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Invalid names: Acteocina anomala Willett 1945 [synonym], Acteocina magdalenensis Dall 1919 [synonym], Tornatina tumida Olrdoyd 1921 [synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

aragonitec

Locomotion:

actively mobileg

Life habit:

semi-infaunalg

Diet:

carnivoreg

Vision:

limitedc

Created:

2018-03-27 14:01:02

Modified:

2018-03-27 14:01:02

Source: g = genus, c = class

References: Chester 1993, Kiessling 2004

Age range: base of the Pliocene to the top of the Middle Pleistocene or 5.33300 to 0.12900 Ma

Collections (2 total)

Time interval	Ma	Country or state	Original ID and collection number
Pliocene	5.333 - 2.588	Ecuador	Acteocina infrequens (96596)
Middle Pleistocene	0.774 - 0.129	USA (California)	Acteocina infrequens, Tornatina tumida, Acteocina tumida (138723)