Hoplitidae

The Hoplitidae is a family of Cretaceous ammonites that lived during the middle of the period from the late Aptian to the Cenomanian. They are part of the superfamily Hoplitoidea.

Hoplitidae
Temporal range: Aptian–Cenomanian
Fossil of Sonneratia dutempleana from France, on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ammonitida
Superfamily:
Hoplitoidea
Family:
Hoplitidae

Members of the Hoplitidae are typically evolute, with inner whorls exposed, although some are more involute, and are commonly stout and strongly ribbed, with pronounced tubercles.

The Hoplitidae are thought to be derived from the U Aptian -M Albian Uligella of the Desmoceratidae, or some related form and have been divided into three subfamilies.

Subtaxa

Classification of Hoplitidae was revised multiple times during last decades. Currently, is contains 3 subfamilies:[1]

  • Gastroplitinae
    • Freboldiceras
    • Arcthoplites
    • ?Sokolovites
    • Pseudopulchellia
    • Gastroplites
    • Irenoceras
    • Neogastroplites
    • ?Alopecoceras
  • Sonneratiinae
    • Bucaillella
    • Sonneratia
    • Pseudosonneratia
    • Anahoplitoides
    • Hemisonneratia
    • Protohoplites
    • Tetrahoplites
  • Hoplitinae
    • Otohoplites
    • Hoplites
      • Hoplites (Hoplites)
      • Hoplites (Isohoplites)
    • Anahoplites
    • Dimorphoplites
    • Epihoplites
      • Epihoplites (Metaclavites)
      • Epihoplites (Epihoplites)
    • Semenoviceras
    • Callihoplites
    • Pleurohoplites
      • Pleurohoplites (Pleurohoplites)
      • Pleurohoplites (Arrhaphoceras)
    • Euhoplites
    • Hyphoplites
      • Hyphoplites (Hyphoplites)
      • Hyphoplites (Discohoplites)

Phylogenetic relations

The Hoplitidae may have given rise to the Schloenbachiidae and seems to be in a different branch of the Hoplitoidea from earlier families included.

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References
  1. Amédro, F., Matrion, B., Magniez-Jannin, F., & Touch, R. (2014). La limite Albien inférieur-Albien moyen dans l’Albien type de l’Aube (France): ammonites, foraminifères, séquences. Revue de Paléobiologie, 33(1), 159-279.
  • Treatise on Invertebrate Paleontology, Part L, Mollusca 4, Mesozoic Ammonoidea. R.C. Moore (ed). Geological Soc. of America and Univ Kansas Press (1957)
  • Hoplitidae-Paleodb


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