| Pilekiidae | |
|---|---|
 | |
| Parapilekia cf. olesnaensis | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Trilobita |
| Order: | Phacopida |
| Family: | Pilekiidae Sdzuy, 1955 |
 | Wikimedia Commons has media related to Pilekiidae . |
Pilekiidae is a family of trilobites in the order Phacopida, specifically within Suborder Cheirurina. It includes the following genera: [1]
Family is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy; it is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as being the "walnut family".
Trilobites are a group of extinct marine arachnomorph arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period, and they flourished throughout the lower Paleozoic era before beginning a drawn-out decline to extinction when, during the Devonian, all trilobite orders except the Proetids died out. Trilobites disappeared in the mass extinction at the end of the Permian about 252 million years ago. The trilobites were among the most successful of all early animals, existing in oceans for over 300 million years.
Phacopida ("lens-face") is an order of trilobite that lived from the Late Cambrian to the Late Devonian. It is made up of a morphologically diverse group of related suborders.
- Anacheiruraspis
- Anacheirurus
- Chashania
- Demeterops
- Emsurina
- Koraipsis
- Landyia
- Macrogrammus
- Metapilekia
- Metapliomerops
- Parapilekia
- Pilekia
- Pliomeroides
- Pseudopliomera
- Seisonia
- Sinoparapilekia
- Victorispina
Anacheirurus is a genus of trilobites. It was described by Reed in 1896, as a new genus for the species Cheirurus frederici, and was originally described by Salter in 1864.
Demeterops is a genus of trilobites in the order Phacopida, that existed during the lower Ordovician in what is now the United States. It was described by Pribyl and Vanek in 1985, and the type species is Demeterops loella, which was originally described as a dubious species in the genus Pilekia by Demeter, in 1973. The new generic name honours the species' original author. The type locality was the Fillmore Formation in Utah.
Emsurina is a genus of trilobites in the order Phacopida, that existed during the upper Cambrian in what is now Russia. It was described by Sivov in 1955, and the type species is Emsurina sibirica. The type locality was the Tolstochikhin Formation in Salair.
