Cephalopoda - Ammonitida - Hildoceratidae
Alternative combinations: Ammonites subplanatus, Harpoceras (Harpoceras) subplanatum
Synonym: Ammonites complanatus d'Orbigny 1846 [replaced name]
Belongs to Harpoceras according to M. Benzaggagh et al. 2022
See also Bécaud 2006, d'Orbigny 1846, Guex 1972, Howarth 1992, Kovács 2011, Oppel 1857 and Stevens 2007
Sister taxa: Harpoceras (Harpoceras), Harpoceras crassefalcatum, Harpoceras dynastes, Harpoceras eseri, Harpoceras falciferum, Harpoceras ignobile, Harpoceras kobelli, Harpoceras lunula, Harpoceras nitescens, Harpoceras pseudoserpentinum, Harpoceras rauracum, Harpoceras serpentinum
Average measurements (in mm): diameter 170.0, shell diameter 102.9
Distribution:
• Jurassic of Canada (10: British Columbia collections), Chile (2), France (17), Hungary (2), Italy (2), Morocco (4), New Zealand (2), Spain (6)
Total: 45 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.