PBDB Taxon

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

Oxycerites (Alcidellus)

Cephalopoda - Ammonitida - Oppeliidae

Taxonomy

Alcidellus was named as a genus. It is not extant.

It was reranked as Oxycerites (Alcidellus) by Parent (1998) and Zatoń (2010).

It was assigned to Ammonoidea by Sepkoski (2002); and to Oxycerites by Parent (1998) and Zatoń (2010).

Subtaxa

Eohecticoceras biflexuosum, Oxycerites (Alcidellus) subdiscus, Oxycerites (Alcidellus) tenuistriatus

Species lacking formal opinion data

Alcidellus obsoletoides, Alcidellus tenuitriatus, Oxycerites aspioides, Oxycerites discus

Synonyms

Eohecticoceras is a genus. It is not extant.

It was synonymized subjectively with Alcidellus by Riccardi and Westermann (1999).

It was assigned to Ammonoidea by Sepkoski (2002).
Eoheteroceras was named by Vasícek and Wiedmann (1994) [Sepkoski's age data: K Barr-l K Barr-u]. It is not extant.

It was synonymized subjectively with Alcidellus by Riccardi and Westermann (1999).

It was assigned to Ammonoidea by Sepkoski (2002).

Synonymy list

Year	Name and author
1994	Eoheteroceras Vasícek and Wiedmann p. 226
1998	Oxycerites (Alcidellus) Parent p. 76
2002	Alcidellus Sepkoski
2002	Eohecticoceras Sepkoski
2002	Eoheteroceras Sepkoski
2010	Oxycerites (Alcidellus) Zatoń p. 86

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Cephalopoda	Cuvier 1797

Rank	Name	Author
subclass	Ammonoidea	()
order	Ammonitida
suborder	Haploceratina
superfamily	Haploceratoidea	(Zittel 1884)
family	Oppeliidae	Bonarelli 1894
genus	Oxycerites
subgenus	Alcidellus

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.

Subg. †Oxycerites (Alcidellus)

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†Oxycerites (Alcidellus) subdiscus d'Orbigny 1846

†Oxycerites (Alcidellus) tenuistriatus de Grossouvre 1888

Invalid names: Eohecticoceras [synonym], Eoheteroceras Vasícek and Wiedmann 1994 [synonym]

Diagnosis

No diagnoses are available

Measurements

part	N	mean
shell height	1	42.2
shell diameter	1	83.3
shell inflation	1	12.7

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: base of the Late/Upper Bathonian to the top of the Early/Lower Barremian or 167.70000 to 125.45000 Ma

Collections (7 total)

Time interval	Ma	Country or state	Original ID and collection number
Bathonian	168.3 - 166.1	Argentina (Neuquén)	Alcidellus tenuitriatus (235861)
Early/Lower Bathonian	167.7 - 164.7	Iran (Damghan)	Oxycerites tenuistriatus (199163)
Early/Lower Bathonian - Middle Bathonian	167.7 - 164.7	Germany	Eohecticoceras sp. (62252)
Late/Upper Bathonian	167.7 - 164.7	Poland	Oxycerites tenuistriatus (186797)
Late/Upper Bathonian	167.7 - 164.7	Argentina (Neuquen)	Alcidellus obsoletoides (158968) Oxycerites tenuistriatus (158973)
Early/Lower Barremian	130.0 - 125.45	Mexico	Eoheteroceras sp. (60779)