Biceratopsinae

The Biceratopsinae is an extinct subfamily of redlichiid trilobites within the family Biceratopsidae, 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]

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
Clade:	†Artiopoda
Class:	†Trilobita
Order:	†Redlichiida
Family:	†Biceratopsidae
Subfamily:	†Biceratopsinae (Pack & Gayle, 1971)[1]
Genera
Biceratops Pack & Gayle, 1971 (Type) Bolbolenellus Palmer and Repina, 1993 Emigrantia nomen nudum Eopeachella Webster, 2009 Nephrolenellus Palmer and Repina, 1993[2] Olenelloides (Peach, 1894) Paranephrolenellus Webster, 2007[3] Peachella (Walcott, 1910)

Etymology

The Biceratopsinae are named for the type species Biceratops nevadensis.

Habitat

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