Cephalopoda - Ammonitida - Nostoceratidae

Genus uncertain. "Ancyloceras? Nicolletii, n. sp." according to J. Hall and F. B. Meek 1855

Alternative combination: Ancyloceras nicolletii

Full reference: J. Hall and F. B. Meek. 1855. Descriptions of New Species of Fossils, from the Cretaceous Formations of Nebraska, with Observations upon Baculites ovatus and B. compressus, and the Progressive Development of the Septa in Baculites, Ammonites, and Scaphites. Memoirs of the American Academy of Arts and Sciences 5(2):379-411

Belongs to Didymoceras according to W. J. Kennedy et al. 2000

Sister taxa: Didymoceras angulatum, Didymoceras aurarium, Didymoceras awajiense, Didymoceras binodosum, Didymoceras californicum, Didymoceras cheyenense, Didymoceras cheyennense, Didymoceras cochleatus, Didymoceras donezianum, Didymoceras draconis, Didymoceras hidakense, Didymoceras hornbyense, Didymoceras nebrascense, Didymoceras newtoni, Didymoceras platycostatum, Didymoceras stevensoni, Didymoceras subtuberculatum, Didymoceras tenuicostatus, Didymoceras tortus, Didymoceras tricostatus, Didymoceras umbilicatus, Didymoceras uncus, Didymoceras vancouverensis, Didymoceras vespertinus, Didymoceras whiteavesi, Nostoceras (Didymoceras) attenuatum, Nostoceras (Didymoceras) densecostatum, Nostoceras (Didymoceras) obtusum, Nostoceras (Didymoceras) postremum, Nostoceras (Didymoceras) varium, Emperoceras cooperii

Ecology: fast-moving nektonic carnivore

Distribution: found only at Great Bend of the Missouri, division No. 4 (Cretaceous of South Dakota)

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Specimen images are retrieved through the ePANDDA API.