ABSTRACT

The ptychoparioid trilobites Eldoradia and Acrocephalops (Family Bolaspididae) are described from the middle Cambrian (Miaolingian Series) of northern Greenland (Laurentia). Eldoradia, originally described from the Secret Canyon Shale of Nevada, is recorded from south-western Wulff Land, North Greenland, where it occurs together with Modocia and Olenoides. Eldoradia caerulioris n. sp. is established. The occurrence of Eldoradia in the lower part of the Blue Cliffs Formation indicates a minimum late middle Cambrian age (Miaolingian Series, Guzhangian Stage) for the base of the formation. Type material of Acrocephalops, a relative of Eldoradia originally proposed on the basis of material from the Miaolingian Series (Wuliuan Stage) of Inglefield Land, North-West Greenland, is redescribed.

摘要

鳞次疟原虫的三叶虫Eldoradia和Acrocephalops（Bo科）是从北格陵兰（Laurentia）的中寒武统（苗岭阶）中描述的。Eldoradia最初是由内华达州的秘密峡谷页岩描述的，记录自西北格陵兰岛的Wulff土地，与Modocia和Olenoides一起出现。Eldoradia caerulioris ñ。sp。成立。蓝崖地层下部的Eldoradia的出现指示了该地层底部的最低中寒武世年龄（苗岭阶，古丈阶）。的类型的材料Acrocephalops，的相对Eldoradia 重新描述了最初基于西北格陵兰岛英格菲尔德地区苗岭期系列（五六段）的资料提出的内容。