Hoplitoides is an ammonite from the Upper Cretaceous, Turonian belonging to the Coilopoceratidae, a family in the Acanthoceratoidea. Hoplitoides have early whorls which are grooved, then flat, and finally narrowly rounded venters; early stages with umbilical tubercles and space ribs, later stages becoming smooth. The suture is similar to that of Coilopoceras but less extreme. Hoplitoides has an established distribution which is widespread, from western North America, northwestern Africa and northern South America.
| Hoplitoides Temporal range: Turonian
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Family: | †Coilopoceratidae |
| Genus: | †Hoplitoides von Koenen, 1898 |
| Type species | |
| H. latesellatus | |
| Species | |
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See text | |
Species
edit- H. gibbulosus
- H. ingens
- H. koeneni
- H. latesellatus (type species)
- H. mirabilis
- H. sandovalensis
- H. wohltmanni
Distribution
editFossils of Hoplitoides have been found in Brazil, Cameroon, Colombia (La Frontera, Huila, Cundinamarca and Boyacá, Loma Gorda, Aipe, Huila and San Rafael Formations),[1][2][3] Mexico, Nigeria, Peru, Trinidad and Tobago, Tunisia, United States (New Mexico), and Venezuela.[4]
References
edit
- ^ Patarroyo, 2016, p.41
- ^ Patarroyo, 2011, p.69
- ^ Patarroyo & Rojas, 2007, pp.92-93
- ^ Hoplitoides at Fossilworks.org
Bibliography
edit- Patarroyo, Pedro (2016), "Amonoideos y otros macrofósiles del lectoestratotipo de la Formación la Frontera, Turoniano inferior - medio (Cretácico Superior) en San Francisco, Cundinamarca (Colombia)" (PDF), Boletín de Geología, Universidad Industrial de Santander, 38: 41–54, retrieved 2017-04-04
- Patarroyo, Pedro (2011), "Sucesión de Amonitas del Cretácico Superior (Cenomaniano-Coniaciano) de la parte más alta de la Formación Hondita y de la Formación Loma Gorda en la Quebrada Bambucá, Aipe - Huila (Colombia)" (PDF), Boletín de Geología, Universidad Nacional de Colombia, 33: 69–92, retrieved 2017-03-30
- Patarroyo, Pedro; Rojas, Alexis (2007), "La sucesión y la fauna del Turoniano de la Formación San Rafael en Pesca y su comparación con la sección tipo en Samacá (Boyacá-Colombia-S.A.)" (PDF), Geología Colombiana, Universidad Nacional de Colombia, 32: 89–96, archived from the original (PDF) on 2017-04-19, retrieved 2017-04-05
Further reading
edit- Arkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Lawrence, Kansas: Geological Society of America and University of Kansas Press.
External links
edit- The Paleobiology Database - Hoplitoides entry accessed 2 December 2011