Hemihoplites

Hemihoplites is an extinct genus of ammonoid cephalopods belonging to the family Hemihoplitidae.[2] These fast-moving nektonic carnivores [1] lived in the Cretaceous period, from Hauterivian age to Barremian age.[3]

Hemihoplites
Temporal range: Cretaceous, [1]
Fossil shells of Hemihoplites soulieri from Alpes-de-Haute-Provence, on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ammonitida
Suborder: †Ancyloceratina
Family: †Hemihoplitidae
Genus: †Hemihoplites
Spath, 1924
Hemihoplites orbignyanus (Matheron), Upper Barremian, Brestak (Coll. St. Breskovski) at the Sofia University Museum of Paleontology and Historical Geology

Description

It is evolute, compressed. The Whorl section is rectangular. The ribs are simple or branching or long or short, well spaced, straight or slightly flexuous, crossing flat venter transversely, typically with distinct umbilical and ventrolateral tubercles.[2]

Species
  • Hemihoplites feraudianus (d'Orbigny, 1841)
  • Hemihoplites mexicanus Imlay, 1940
  • Hemihoplites ploszkiewiczi Riccardi and Aguirre Urreta, 1989
  • Hemihoplites soulieri (Matheron, 1878)
  • Hemihoplites varicostatus Riccardi and Aguirre Urreta, 1989

Distribution

Fossils of species within this genus have been found in the Cretaceous rocks of Antarctida (Alexander Island), Bulgaria, southeastern France, Mexico, Slovakia, South Africa and Trinidad and Tobago.[1]

References
  1. "Hemihoplites". fossilworks.
  2. Wright, C. W. with Callomon, J.H. and Howarth, M.K. (1996), Mollusca 4 Revised , Cretaceous Ammonoidea, vol. 4, in Treatise on Invertebrate Paleontology, Part L (Roger L. Kaesler et el. eds.), Boulder, Colorado: The Geological Society of America & Lawrence, Kansas: University of Kansas Press, pp. 228, 231.
  3. Sepkoski, Jack Sepkoski's Online Genus Database – Cephalopoda
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