PBDB Taxon

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Romaniceras

Cephalopoda - Ammonitida - Acanthoceratidae

Taxonomy

Romaniceras was named by Spath (1923) [Sepkoski's age data: K Ceno-u K Turo-u].

It was reranked as Acanthoceras (Romaniceras) by Haas (1942).

It was assigned to Acanthoceras by Haas (1942); to Acanthoceratidae by Matsumoto (1959), Kennedy and Cobban (1988), Matsumoto and Skwarko (1991) and Matsumoto and Skwarko (1993); to Ammonoidea by Sepkoski (2002); and to Euomphaloceratinae by Cooper (1978), Wright and Kennedy (1981), Wright (1983), Kennedy and Cobban (1988), Wright et al. (1996), Barroso-Barcenilla (2004), Kennedy et al. (2008) and Benzaggagh et al. (2017).

Species

R. (Neomphaloceras), R. (Obiraceras), R. (Romaniceras), R. (Shuparoceras), R. (Yubariceras), R. deverioides (syn. Mantelliceras conquistador, R. hesperium), R. pseudodeverianum, R. uchauxiense

Species lacking formal opinion data

R. deveroide, R. inerme, R. yezoense

Synonyms

Tunesites is a genus. It is not extant.

It was considered a nomen dubium by Wright et al. (1996); it was replaced with Romaniceras by Kennedy et al. (2015).

It was assigned to Euomphaloceratinae by Cooper (1978); and to Ammonoidea by Sepkoski (2002).
Kossmatia was named by Yabe (1927).

It was synonymized subjectively with Romaniceras by Arkell et al. (1957) and Chancellor et al. (1994).

Synonymy list

Year	Name and author
1923	Romaniceras Spath
1927	Kossmatia Yabe
1942	Acanthoceras (Romaniceras) Haas p. 1
1959	Romaniceras Matsumoto p. 86
1978	Romaniceras Cooper p. 103
1978	Tunesites Cooper p. 103
1981	Romaniceras Wright and Kennedy
1983	Romaniceras Wright
1988	Romaniceras Kennedy and Cobban p. 24
1991	Romaniceras Matsumoto and Skwarko p. 258
1993	Romaniceras Matsumoto and Skwarko p. 424
1996	Romaniceras Wright et al. p. 171
2002	Romaniceras Sepkoski
2002	Tunesites Sepkoski
2004	Romaniceras Barroso-Barcenilla p. 94
2008	Romaniceras Kennedy et al. p. 153
2017	Romaniceras Benzaggagh et al. p. 113

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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	Ammonitina	Hyatt 1889
superfamily	Acanthoceratoidea	(de Grossouvre 1894)
family	Acanthoceratidae	Grossouvre 1894
subfamily	Euomphaloceratinae
genus	Romaniceras	Spath 1923

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.

G. †Romaniceras Spath 1923

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Subg. †Romaniceras (Neomphaloceras) Matsumoto and Obata 1982

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†Romaniceras (Neomphaloceras) pseudomphalum Matsumoto 1975

Subg. †Romaniceras (Obiraceras) Matsumoto 1975

Subg. †Romaniceras (Romaniceras) Spath 1923

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†Romaniceras (Romaniceras) deverianum d'Orbigny 1841

†Romaniceras (Romaniceras) deverianus d'Orbigny 1841

†Romaniceras (Romaniceras) kallesi Zázvorka 1958

†Romaniceras (Romaniceras) mexicanum Jones 1938

Invalid names: Romaniceras (Romaniceras) indiduraense Jones 1938 [synonym], Romaniceras adkinsi Jones 1938 [synonym], Romaniceras santaanaense Jones 1938 [synonym], Romaniceras toribioense Jones 1938 [synonym]

Subg. †Romaniceras (Shuparoceras) Matsumoto 1975

Subg. †Romaniceras (Yubariceras) Matsumoto 1957

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†Romaniceras (Yubariceras) evolutum Zaborski 1990

†Romaniceras (Yubariceras) kanei Jones 1938

†Romaniceras (Yubariceras) ornatissimum Stoliczka 1864

Invalid names: Yubariceras yubarense Matsumoto et al. 1957 [synonym]

†Romaniceras (Yubariceras) reymenti Collignon 1967

Invalid names: Selwynoceras zeharaense Collignon 1967 [synonym]

†Yubariceras gosavicum Wiedmann 1979

†Romaniceras deverioides de Grossouvre 1889

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Invalid names: Mantelliceras conquistador Anderson 1958 [synonym], Romaniceras hesperium Anderson 1958 [synonym]

†Romaniceras pseudodeverianum Jimbo 1894

†Romaniceras uchauxiense Collignon 1939

Invalid names: Kossmatia Yabe 1927 [synonym], Tunesites [replaced]

Diagnosis

Reference	Diagnosis
C. W. Wright et al. 1996	Rather evolute; whorl section circular, oval, or subquadrate; early whorls with constrictions and associated ribs; later whorls with strong ribs and 9 to 13 rows of more or less equal tubercles, equidistant or not; ventrolateral and siphonal tubercles may be clavate. On mature whorls some or all tubercles disappearing and ribs mainly long and strong, uninterrupted on venter.