Mid-Furongian trilobites and agnostids from theWujiajiania lyndasmithaeSubzone of theElviniaZone, McKay Group, southeastern British Columbia, Canada

Abstract

AbstractA well-preserved fauna of largely articulated trilobites is described from three new localities close to one another in the Bull River Valley, southeastern British Columbia. All the trilobites from these localities are from the lower or middle part of theWujiajiania lyndasmithaeSubzone of theElviniaZone, lower Jiangshanian, in the McKay Group. Two new species are proposed with types from these localities:Aciculolenus askewiandCliffia nicoleae. The trilobite (and agnostid) fauna from these localities includes at least 20 species:Aciculolenus askewin. sp.,Agnostotes orientalis(Kobayashi, 1935),Cernuolimbus ludvigseniChatterton and Gibb, 2016,Cliffia nicoleaen. sp.,Elvinia roemeri(Shumard, 1861),Grandagnostus? species 1 of Chatterton and Gibb, 2016,Eugonocare?phillipiChatterton and Gibb, 2016,Eugonocare? sp. A,Housia vacuna(Walcott, 1912),Irvingella convexa(Kobayashi, 1935),Irvingella flohriResser, 1942,Irvingellaspecies B Chatterton and Gibb, 2016,Olenaspella chrisnewiChatterton and Gibb, 2016,Proceratopyge canadensis(Chatterton and Ludvigsen, 1998),Proceratopyge rectispinata(Troedsson, 1937),Pseudagnostuscf.P. josepha(Hall, 1863),Pseudagnostus securiger(Lake, 1906),Pseudeugonocare bispinatum(Kobayashi, 1962),Pterocephaliasp., andWujiajiania lyndasmithaeChatterton and Gibb, 2016.Pseudagnostus securiger, a widespread early Jiangshanian species, has not been previously recorded from southeastern British Columbia. Non-trilobite fossils collected from these localities include brachiopods, rare trace fossils, a complete silica sponge (Hyalospongea), and a dendroid graptolite. The faunas from these localities are more diverse and better preserved than those from other previously documented localities of the same age in the region.Additional specimens of a rare species, found by amateur collectors in previously documented localities of slightly younger age (upper part ofWujiajiania lyndasmithaeSubzone) in the same region, are documented. These new specimens, when combined with an earlier discovered specimen, provide adequate type material to propose a new species ofLabiostria, L. gibbae, which may be useful for biostratigraphy.UUID:http://zoobank.org/89551eac-b3af-4b2b-8ef3-7c2e106a560d