Biceratopsinae

Biceratopsinae; Temporal range: Toyonian (Upper Olenellus-zone) 516–513 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
	Emigrantia sp., a cephalon
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Trilobita
Order:	Redlichiida
Suborder:	Olenellina
Superfamily:	Olenelloidea
Family:	Biceratopsidae
Subfamily:	Biceratopsinae; (Pack & Gayle, 1971)
Genera
	Biceratops Pack & Gayle, 1971 (Type); Bolbolenellus Palmer and Repina, 1993; Emigrantia nomen nudum; Eopeachella Webster, 2009; Nephrolenellus Palmer and Repina, 1993; Olenelloides (Peach, 1894); Paranephrolenellus Webster, 2007; Peachella (Walcott, 1910);

The Biceratopsinae is an extinct subfamily of trilobites, fossil marine arthropods, with species of small to average size. Species belonging to this subfamily lived during the Toyonian stage (Upper Olenellus-zone), 516-513 million years ago, in the former continent of Laurentia, including what are today the South-Western United States and Canada.^[4]

Etymology

The Biceratopsinae are named for the type species Biceratops nevadensis.

Habitat

The Biceratopsinae were probably marine bottom dweller, like all Olenellina.

References

^ Lieberman, B.S. (1999). "Systematic Revision of the Olenelloidea (Trilobita, Cambrian)" (PDF). Bulletin of the Peabody Museum of Natural History. 45.
^ M., Webster (2007). "Ontogeny and evolution of the early Cambrian trilobite genus Nephrolenellus (Olenelloidea)". Journal of Paleontology. 81: 1168–1193. doi:10.1666/06-092.1.
^ Webster, M. (2007). "Paranephrolenellus, a New Genus of Early Cambrian Olenelloid Trilobite". Memoirs of the Association of Australasian Palaeontologists. 34: 101–130.
^ Pack, P.D.; Gayle, H.B. (2009). "A New Olenellid Trilobite, Biceratops nevadensis, from the Lower Cambrian near Las Vegas, Nevada". Journal of Paleontology. Vol. 45, no. 5. pp. 893–898.

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[Lieberman_1999-1] Lieberman, B.S. (1999). "Systematic Revision of the Olenelloidea (Trilobita, Cambrian)" (PDF). Bulletin of the Peabody Museum of Natural History. 45.

[Webster_2007a-2] M., Webster (2007). "Ontogeny and evolution of the early Cambrian trilobite genus Nephrolenellus (Olenelloidea)". Journal of Paleontology. 81: 1168–1193. doi:10.1666/06-092.1.

[Webster_2007b-3] Webster, M. (2007). "Paranephrolenellus, a New Genus of Early Cambrian Olenelloid Trilobite". Memoirs of the Association of Australasian Palaeontologists. 34: 101–130.

[Pack&Gayle-4] Pack, P.D.; Gayle, H.B. (2009). "A New Olenellid Trilobite, Biceratops nevadensis, from the Lower Cambrian near Las Vegas, Nevada". Journal of Paleontology. Vol. 45, no. 5. pp. 893–898.

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