Dolichometopidae is a

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

of corynexochid

trilobite Trilobites (; meaning "three lobes") are extinct marine 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 At ...

s that lived in the

Cambrian The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million ...

, from the lower

Botomian Cambrian Stage 4 is the still unnamed fourth stage of the Cambrian and the upper stage of Cambrian Series 2. It follows Cambrian Stage 3 and lies below the Wuliuan. The lower boundary has not been formally defined by the International Commission on ...

to the

Dresbachian The Dresbachian is a Maentwrogian regional stage of North America, lasting from 501 to 497 million years ago. It is part of the Upper Cambrian and is defined by four trilobite zones. It overlaps with the ICS-stages Guzhangian, Paibian and the lowe ...

. It contains the following genera: *'' Aegunaspis'' *'' Amphoton'' *'' Anoria'' *'' Asperocare'' *'' Athabaskia'' *'' Athabaskiella'' *'' Atypicus'' *'' Basanellus'' *'' Bathyuriscidella'' *'' Bathyuriscus'' *'' Borovikovia'' *'' Centonella'' *'' Chilometopus'' *'' Chilonorria'' *'' Clavaspidella'' *'' Corynexochides'' *'' Deiradonyx'' *'' Dolicholeptus'' *'' Dolichometopsis'' *'' Dolichometopus'' *'' Drozdoviella'' *'' Erratobalticus'' *'' Ezhuangia'' *'' Fuchouia'' *'' Glossopleura'' *''? Granularaspis'' *'' Guraspis'' *''? Hanburia'' *'' Hemirhodon'' *'' Horonastes'' *'' Itydeois'' *'' Kannoriella'' *'' Klotziella'' *'' Lianhuashania'' *'' Mendospidella'' *'' Neopoliellina'' *'' Parapoliella'' *'' Poliella'' *'' Poliellaspidella'' *'' Poliellaspis'' *'' Poliellina'' *'' Politinella'' *'' Polypleuraspis'' *'' Prosymphysurus'' *'' Pseudamphoton'' *'' Ptannigania'' *'' Saimixiella'' *'' Sestrostega'' *'' Shanghaia'' *'' Sinijanella'' *'' Suvorovaaspis'' *'' Undillia'' *'' Zhenpingaspis''

References

Corynexochina Trilobite families Cambrian trilobites Cambrian first appearances Miaolingian extinctions {{Corynexochida-stub