| Basic info | Taxonomic history | Classification | Relationships |
| Morphology | Ecology and taphonomy | Age range and collections |
Calycoceras (Newboldiceras)
Cephalopoda - Ammonitida - Acanthoceratidae
Taxonomy
Newboldiceras was named by Thomel (1972) [Sepkoski's age data: K Ceno-m].
It was reranked as Calycoceras (Newboldiceras) by Matsumoto and Skwarko (1991), Matsumoto and Skwarko (1993), Kennedy (1994), Kennedy et al. (1996), Kennedy and Jolkicev (2004), Ahmad et al. (2013) and Gale et al. (2018).
It was assigned to Ammonoidea by Sepkoski (2002); and to Calycoceras by Matsumoto and Skwarko (1991), Matsumoto and Skwarko (1993), Kennedy (1994), Kennedy et al. (1996), Kennedy and Jolkicev (2004), Ahmad et al. (2013) and Gale et al. (2018).
It was reranked as Calycoceras (Newboldiceras) by Matsumoto and Skwarko (1991), Matsumoto and Skwarko (1993), Kennedy (1994), Kennedy et al. (1996), Kennedy and Jolkicev (2004), Ahmad et al. (2013) and Gale et al. (2018).
It was assigned to Ammonoidea by Sepkoski (2002); and to Calycoceras by Matsumoto and Skwarko (1991), Matsumoto and Skwarko (1993), Kennedy (1994), Kennedy et al. (1996), Kennedy and Jolkicev (2004), Ahmad et al. (2013) and Gale et al. (2018).
Subtaxa
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1972 | Newboldiceras Thomel |
| 1991 | Calycoceras (Newboldiceras) Matsumoto and Skwarko p. 252 |
| 1993 | Calycoceras (Newboldiceras) Matsumoto and Skwarko p. 423 |
| 1994 | Calycoceras (Newboldiceras) Kennedy p. 227 |
| 1996 | Calycoceras (Newboldiceras) Kennedy et al. p. 314 |
| 2002 | Newboldiceras Sepkoski, Jr. |
| 2004 | Calycoceras (Newboldiceras) Kennedy and Jolkicev p. 375 |
| 2013 | Calycoceras (Newboldiceras) Ahmad et al. p. 27 |
| 2018 | Calycoceras (Newboldiceras) Gale et al. p. 116 |
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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.
Diagnosis
No diagnoses are available