†Calycoceras (Newboldiceras) annulatum Collignon 1964 (ammonite)

Cephalopoda - Ammonitida - Acanthoceratidae

Alternative combination: Calycoceras annulatum

Belongs to Calycoceras (Newboldiceras) according to T. Matsumoto and S. K. Skwarko 1991

See also Zaborski 1985

Sister taxa: Calycoceras (Newboldiceras) asiaticum, Calycoceras (Newboldiceras) hippocastanum, Calycoceras (Newboldiceras) mourrei, Calycoceras (Newboldiceras) orientale, Calycoceras (Newboldiceras) planecostatum, Calycoceras (Newboldiceras) tapara

Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell diameter 229.6

Distribution:

• Cretaceous of Nigeria (1 collection), Papua New Guinea (1)

Total: 2 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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