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Placenticeras placenta

Cephalopoda - Ammonitida - Placenticeratidae

Taxonomy
Ammonites placenta was named by DeKay (1828) [DISTRIBUTION: Campanian; Atlantic and Gulf Coastal Plain.]. It is a 3D body fossil. It is the type species of Placenticeras.

It was recombined as Placenticeras placenta by Cobban and Hook (1983), Cobban and Kennedy (1992), Kennedy and Cobban (1993), Kennedy and Cobban (1994), Kennedy et al. (1997), Sealey and Lucas (2019).

Sister species lacking formal opinion data
P. costatum, P. guardakense, P. interealare, P. kyzylkumense, P. meeki, P. minor, P. placentum, P. tamilicum
Entered
by A. Hendy on 2008-07-26; modified by A. Hendy on 2013-04-30

Synonymy list
YearName and author
1828Ammonites placenta DeKay p. 278 figs. pl. 5, fig. 2
1983Placenticeras placenta Cobban and Hook p. 8
1992Placenticeras placenta Cobban and Kennedy p. 443 figs. 3.1, 3.5, 7.4
1993Placenticeras placenta Kennedy and Cobban p. 834
1994Placenticeras placenta Kennedy and Cobban p. 1288
1997Placenticeras placenta Kennedy et al. p. 4
2019Placenticeras placenta Sealey and Lucas p. 156 figs. 103, 104

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classCephalopodaCuvier 1797
RankNameAuthor
subclassAmmonoidea()
orderAmmonitidaHaeckel 1866
suborderAmmonitinaHyatt 1889
superfamilyHoplitoidea(Douvillé 1890)
familyPlacenticeratidae
genusPlacenticerasMeek 1876
speciesplacenta(DeKay 1828)

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.

†Placenticeras placenta DeKay 1828
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: aragoniteo
Environment: marinec
Locomotion: fast-movingo
Life habit: nektonico
Diet: carnivoreo
Vision: well-developedc
Created: 2005-01-28 02:27:03
Modified: 2009-10-08 14:14:55
Source: o = order, c = class
References: Kiessling 2004, Kiessling 2003

Age range: Late/Upper Campanian or 83.60000 to 72.20000 Ma

Collections (27 total)


Time interval Ma Country or state Original ID and collection number
Campanian83.6 - 72.2USA (New Jersey) Placenticeras placenta (124222 141944)
Campanian83.6 - 72.2USA (North Carolina) Placenticeras placenta (190555 190579)
Early/Lower Campanian83.6 - 72.2USA (New Jersey) Placenticeras placenta (82387 88606 88610 188337)
Early/Lower Campanian83.6 - 72.2USA (Maryland) Placenticeras placenta (27571 82386)
Early/Lower Campanian83.6 - 72.2USA (Texas) Placenticeras placenta (221086)
Early/Lower Campanian83.6 - 72.2USA (Delaware) Placenticeras placenta (6119 6120 6123 6130 6133 6135 46566 88609)
Early/Lower Campanian - Middle Campanian83.6 - 72.2USA (Mississippi) Placenticeras placenta (6655 6656 6657 6658)
Early/Lower Campanian - Middle Campanian83.6 - 72.2USA (New Jersey) Ammonites placenta (48725) Placenticeras placenta (141940)
Late/Upper Campanian83.6 - 72.2USA (Delaware) Placenticeras placenta (83133)
Middle Campanian - Late/Upper Campanian83.6 - 72.2USA (New Jersey) Placenticeras placenta (3870)