organisms from the Lower to Middle Cambrian. Their eponymous genus is Halkieria /hælˈkɪəriə/, which has been found on almost every continent in Lower...

Wiwaxia Halkieria...

lophotrochozoans that were potentially related to either lophophorates or mollusks. Halkieria was a bizarre invertebrate that was an early member of the mollusk group...

was formed by combining the names of two members of the proposed group, Halkieria and Wiwaxia. The group was defined as a set of Early to Mid Cambrian animals...

suggested in 2003 that brachiopods had evolved from an ancestor similar to Halkieria, a slug-like Cambrian animal with "chain mail" on its back and a shell...

hyolithids. When he later described the first fairly complete specimens of Halkieria, he suggested that these were closely related to Wiwaxia. Nick Butterfield...

Namacalathus Yochelsoniella Elements of a scleritome, resembling Halkieria:[clarification needed] Halkieria Probable palaeoscolecid worm sclerites: Palaeoscolex Maikhanella...

fragments that once made up the external armor of early animals, such as Halkieria or "scale worms". Fairly complete and assembled sets, which are rare,...

certainly belonged to molluscs, while the owners of some "armor plates", Halkieria and Microdictyon, were eventually identified when more complete specimens...

trilobites, hyoliths, sponges, brachiopods, and no echinoderms or molluscs. Halkieria has features associated with more than one living phylum, and is discussed...

Wiwaxia Halkieria...

slug-like form Wiwaxia; an armored worm with a pair of brachiopod-like shells Halkieria; and another armored worm Microdictyon that is generally considered to...

representatives of other groups. It has yielded the problematic taxon Halkieria, and the Panarthropods Kerygmachela and Pambdelurion, all of which have...

Australohalkieria (meaning "southern Halkieria") is an extinct genus of halkieriid from Australia and Antarctica. This species, named by Porter in 2004...

certainly belonged to molluscs, while the owners of some "armor plates," Halkieria and Microdictyon, were eventually identified when more complete specimens...

S2CID 26108547. Vinther, J.; Nielsen, C. (2005). "The Early Cambrian Halkieria is a mollusc". Zoologica Scripta. 34: 81–89. doi:10.1111/j.1463-6409.2005...

certainly belonged to molluscs, while the owners of some "armor plates," Halkieria and Microdictyon, were eventually identified when more complete specimens...

has been hypothesized that the sclerites of Cambrian halwaxiids such as Halkieria may potentially be more analogous to the sclerites of this snail than...

microstructure. Their skeletons may be homologous to those of the molluscs, and Halkieria looks very much like a polyplacophoran. The shells of this group and the...

marine mollusks. Its sclerites are flattened and resemble the sclerites of Halkieria. García-Álvarez, Óscar; v. Salvini-Plawen, Luitfried (2007). "Species...

come under fire, suggests that the brachiopods arose by the folding of a Halkieria-like organism, which bore two protective shells at either end of a scaled...

right-hand sclerites exist, so the animal was bilaterally symmetrical; as in Halkieria, palmate, cultrate and siculate sclerite morphologies exist. The chambers...

shell without an apex. It has been tentatively interpreted as resembling Halkieria, but it does not contain sclerites. It is the first of its kind in the...

known from isolated sclerites, but are believed to have a scleritomous, Halkieria-like construction. This was confirmed by the discovery of Wufengella,...

Cambrian taxa, it has been suggested that they arise through reduction of a Halkieria-like ancestor. Thought to be low-Mg calcite. The earliest occurrence dates...

†Fomitchella †Fomitchella infundabiliformis †Gracilitheca †Gracilitheca bayonet †Halkieria †Hyolithellus †Hyolithellus micans – or unidentified related form †Hyolithes...

Isoxys volucris Hadranax augustus Pauloterminus spinodorsalis Molluscs Halkieria evangelista Demosponges Choia hindei Others Heliosphaeridium dissimilare...

propose an alternative - that halkieriids (including orthrozanclus and halkieria) are unrelated to Wiwaxia, but are instead related to the camenellan tommotiids...

†Goniatites †Gonioceras †Goniograptus †Greenops †Grinnellaspis †Gyroceras †Halkieria †Hallipterus †Halloceras †Hallopora †Hallopora elegantula †Halysites †Halysites...

right-hand sclerites exist, so the animal was bilaterally symmetrical; as in Halkieria, palmate, cultrate and siculate sclerite morphologies exist. Vinther,...