''Paranephrolenellus'' is an

extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

trilobite Trilobites (; meaning "three-lobed entities") are extinction, extinct marine arthropods that form the class (biology), class Trilobita. One of the earliest groups of arthropods to appear in the fossil record, trilobites were among the most succ ...

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserve ...

marine

arthropods Arthropods ( ) are invertebrates in the phylum Arthropoda. They possess an arthropod exoskeleton, exoskeleton with a cuticle made of chitin, often Mineralization (biology), mineralised with calcium carbonate, a body with differentiated (Metam ...

. Currently four species are attributed to it. ''Paranephrolenellus'' lived at the end of the

Lower Cambrian The Cambrian ( ) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. The Cambrian lasted 51.95 million years from the end of the preceding Ediacaran period 538.8 Ma (million years ago) to the beginning of the Ordovici ...

Etymology

''Paranephrolenellus'' is named for the close similarity of this genus to '' Nephrolenellus''. The names of the species are derived as follows. * ''P. besti'' is named in honor of R.V. Best, for his work on the olenelloids of the Laurentian Cordillera. * ''P. inflatus'' refers to the inflation of the lateral cephalic border and base of the genal spines. * ''P. klondikensis'' is named for Klondike Gap, Chief Range, where the species was first discovered.

References

Cambrian trilobites of North America Redlichiida genera Biceratopsidae Cambrian genus extinctions {{Redlichiida-stub