Acmarhachis

Acmarhachis; Temporal range:
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Trilobita (?)
Order:	†Agnostida
Family:	†Agnostidae
Genus:	†Acmarhachis; Resser, 1938
Species
	A. typicalis Resser, 1938 (type); A. acuta (Kobayashi, 1938); A. anhuiensis (Qiu, 1983) synonym Wanagnostus anhuiensis; A. apicula Öpik, 1967 synonym Oxyagnostus apicula; A. elegans (Lermontova, 1940) synonym Cyclagnostus elegans Lerm., 1940; A. karatauensis Ergaliev, 1980; A. longispinus Ergaliev, 1980; A. punctatus Ergaliev, 1980; A. whittingtoni Westrop & Eoff, 2012;
Synonyms
	Cyclagnostus; Wanagnostus;

Acmarhachis is a genus of trilobites in the order Agnostida, which lived in what are now Australia (Queensland, Tasmania), Canada (British Columbia, Newfoundland, Northwest Territories), China (Anhui), Kazakhstan, Russia (Kharaulakh), and the US (Alaska, Alabama, Nevada, Maryland, Vermont). It was described by Resser in 1938, and the type species is Acmarhachis typicalis.