RETRACTION—Eldonioids with associated trace fossils from the lower Cambrian Emu Bay Shale Konservat-Lagerstätte of South Australia
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چکیده
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Articulated Wiwaxia from the Cambrian Stage 3 Xiaoshiba Lagerstätte
Wiwaxia is a bizarre metazoan that has been interpreted as a primitive mollusc and as a polychaete annelid worm. Extensive material from the Burgess Shale provides a detailed picture of its morphology and ontogeny, but the fossil record outside this lagerstätte is scarce, and complete wiwaxiids are particularly rare. Here we report small articulated specimens of Wiwaxia foliosa sp. nov. from th...
متن کاملA predatory bivalved euarthropod from the Cambrian (Stage 3) Xiaoshiba Lagerstätte, South China
Bivalved euarthropods represent a conspicuous component of exceptionally-preserved fossil biotas throughout the Lower Palaeozoic. However, most of these taxa are known from isolated valves, and thus there is a limited understanding of their morphological organization and palaeoecology in the context of early animal-dominated communities. The bivalved euarthropod Clypecaris serrata sp. nov., rec...
متن کاملShallow−water occurrence of Wiwaxia in the middle Cambrian of the Barrandian area, Czech Republic
A rich record of specimens with slightly sclerotised skeletal parts or even soft−bodied fossils have been established from several well−known lower and middle Cambrian Lagerstätte, e.g., Bur− gess Shale of the Stephen Formation, Kinzers, Marjum, and Wheeler formations in North America; Buen Formation in North Greenland; Doushantuo, Chengjiang, and Kaili in China; Emu Bay Shale in Australia and ...
متن کاملOldest Near-Complete Acanthodian: The First Vertebrate from the Silurian Bertie Formation Konservat-Lagerstätte, Ontario
BACKGROUND The relationships between early jawed vertebrates have been much debated, with cladistic analyses yielding little consensus on the position (or positions) of acanthodians with respect to other groups. Whereas one recent analysis showed various acanthodians (classically known as 'spiny sharks') as stem osteichthyans (bony fishes) and others as stem chondrichthyans, another shows the a...
متن کاملChancelloriids of the Cambrian Burgess Shale
The cactus-like chancelloriids from the Middle Cambrian Burgess Shale are revised on the basis of Walcott’s (1920) original collections and new material containing several hundred specimens collected by Royal Ontario Museum field expeditions from 1975 to 2000. Walcott’s interpretation of chancelloriids as sponges was based on a misinterpretation of the dermal coelosclerites as embedded sponge-t...
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ژورنال
عنوان ژورنال: Journal of Paleontology
سال: 2018
ISSN: 0022-3360,1937-2337
DOI: 10.1017/jpa.2017.156