Cephalopoda - Ammonitida - Acanthoceratidae
Alternative spelling: Newboldiceras
Synonyms: Acanthoceras (Pseudacanthoceras) Thomel 1972, Newboldiceras (Mourreiceras) Thomel 1972, Newboldiceras (Newboldiceras) Thomel 1972 [objective synonym]
Full reference: G. Thomel. 1972. Les Acanthoceratidae Cénomaniens des châines subalpines méridionales. Mémoires de la Société Géologique de France (N.S.) 116:1-204
Parent taxon: Calycoceras according to A. S. Gale et al. 2018
See also Ahmad et al. 2013, Kennedy 1994, Kennedy et al. 1996, Kennedy and Jolkicev 2004, Matsumoto and Skwarko 1991, Matsumoto and Skwarko 1993, Renz 1982, Sepkoski 2002, Thomel 1972 and Wright et al. 1996
Sister taxa: Calycoceras (Calycoceras), Calycoceras (Conlinoceras), Calycoceras (Gentoniceras), Calycoceras (Hourcqiceras), Calycoceras (Proeucalycoceras), Calycoceras bathyomphalum, Calycoceras boulei, Calycoceras choffati, Calycoceras lafouxiense, Calycoceras robustum, Calycoceras spinosum
Subtaxa: Calycoceras (Newboldiceras) annulatum Calycoceras (Newboldiceras) asiaticum Calycoceras (Newboldiceras) hippocastanum Calycoceras (Newboldiceras) mourrei Calycoceras (Newboldiceras) orientale Calycoceras (Newboldiceras) planecostatum Calycoceras (Newboldiceras) tapara
Type: Acanthoceras newboldi
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of Antarctica (2 collections), Australia (2), Bulgaria (10), Canada (1: British Columbia), France (9), India (3), Japan (1), Jordan (2), Mozambique (1), Nigeria (1), Papua New Guinea (4), Spain (1), Tunisia (1), the United Kingdom (2), United States (2: California)
Total: 42 collections including 48 occurrences