A myriapod-like arthropod from the Upper Cambrian of East Siberia

Budd, Graham E.; Högström, Anette; Gogin, Ivan

doi:10.1007/bf03022596

Cited by 12 publications

(6 citation statements)

References 12 publications

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“…5B). These taxa may share multiple homonomous segments and other characters with the recently described homonomous middle Cambrian arthropods Worthenella cambria and Kootenichela deppi (Legg, 2013), and the upper Cambrian Xanthomyria spinosa (Budd et al, 2001). The elbowed deutocerebral appendages of this second group are distinct in that their distal podomeres are short and broad and do not taper as flagella (Figs.…”

Section: Q7mentioning

confidence: 97%

Arthropod eyes: The early Cambrian fossil record and divergent evolution of visual systems

Strausfeld

Edgecombe

et al. 2016

Arthropod Structure & Development

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Section: Q7mentioning

confidence: 97%

Arthropod eyes: The early Cambrian fossil record and divergent evolution of visual systems

Strausfeld

Edgecombe

et al. 2016

Arthropod Structure & Development

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“…The morphology of backfills, fecal pellets, and burrowsize distribution are compatible with the creation of S. beerboweri by polyzoniid or similar millipedes (Retallack 2001b;Retallack et al 2011). This interpretation was challenged by , who considered the oldest millipedes Silurian and were unaware of Late Ordovician (Sandbian) millipede trackways (Johnson et al 1994), Cambrian millipedelike fossils (Hou and Bergström 1998;Budd et al 2001;Retallack et al 2011) fig. 8B, upper left) is a clay-lined structure, within an excavated hollow, containing organic lined spherical structures.…”

Section: Paleosols and Associated Fossilsmentioning

confidence: 99%

Late Ordovician Glaciation Initiated by Early Land Plant Evolution and Punctuated by Greenhouse Mass Extinctions

Retallack

2015

The Journal of Geology

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Late Ordovician (Hirnantian) glaciation, indicated by periglacial paleosols, tillites, and glacial pavements in Saharan Africa, has been attributed to advances in weathering and carbon sequestration due to evolution of early land plants, in the same way that Devonian-Permian glaciation has been attributed to evolution of forests and Quaternary glaciations to evolution of grasslands. Two problems for carbon cycle explanations of this glaciation are an Hirnantian CO 2 greenhouse estimated at 4035 ppmv from mass balance models and possibly related Hirnantian mass extinctions. This estimate of high CO 2 is a 10-m.yr. average, here evaluated against high-resolution sequences of paleosols that give estimates not only of CO 2 but also of paleoclimate and vegetation through the Late Ordovician. Katian paleosols of the eastern United States show increases in depth and in degree of carbon consumption and storage comparable with those preceding glaciation of the Devonian-Permian and Quaternary. Early thalloid land plants with rhizoids may have drawn down atmospheric CO 2 to only 166 5 83 ppmv during the Hirnantian, as estimated here from a pedogenic CO 2 paleobarometer. Ordovician paleosols also reveal a short-term greenhouse spike to as much as 4670 ppmv immediately before Hirnantian glaciation. This greenhouse spike may be due to thermogenic methane release from a large igneous province and is comparable with greenhouse spikes during other mass extinctions, such as those of the Late Permian and Late Jurassic.

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“…The segmentation of the main body axis into discrete plates, i.e., arthrodisation, is instead indicative of arthropod affinities and is the interpretation favored herein. The long multisegmented trunk of W. cambria is reminiscent of a number of Cambrian arthropod taxa, such as Pseudoiulia cambriensis Hou and Bergström, 1998 and Xanthomyria spinosa Budd et al 2001. These taxa have been allied to the Myriapoda (Budd et al, 2001), based on the shared presence of a long body with homonymous segments.…”

Section: 3)mentioning

confidence: 99%

Multi-Segmented Arthropods from the Middle Cambrian of British Columbia (Canada)

Legg

2013

J. Paleontol.

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A new arthropod, Kootenichela deppi n. gen. n. sp., is described from the Stanley Glacier exposure of the middle Cambrian (Series 3, Stage 5) Stephen Formation in Kootenay National Park (British Columbia, Canada). This taxon possesses a number of primitive arthropod features such as an elongate, homonomous trunk (consisting of at least 29 segments), poorly sclerotised trunk appendages, and large pedunculate eyes associated with an anterior (ocular) sclerite. The cephalon encompasses a possible antenna-like appendage and enlarged raptorial appendages with a bipartite peduncle and three spinose distal podomeres, indicative of megacheiran (“great-appendage” arthropod) affinities. The relationships of megacheirans are controversial, with them generally considered as either stem-euarthropods or a paraphyletic stem-lineage of chelicerates. An extensive cladistic analysis resolved Kootenichela as sister-taxon to the enigmatic Worthenella cambria from the middle Cambrian (Series 3, Stage 5), Burgess Shale Formation in Yoho National Park (British Columbia), which is herein reinterpreted as a megacheiran arthropod. Based on their sister-group relationship, both taxa were placed in the new family Kootenichelidae, to which Pseudoiulia from the Chengjiang biota is also tentatively assigned. All of these taxa possess an elongate, multi-segmented body and subtriangular exopods. This family occupies a basal position within a paraphyletic Megacheira, the immediate outgroup of Euarthropoda (crown-group arthropods). The resultant topology indicates that analyses that have resolved megacheirans as stem-chelicerates have done so because they have rooted on inappropriate taxa, e.g., trilobitomorphs and marrellomorphs.

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A myriapod-like arthropod from the Upper Cambrian of East Siberia

Cited by 12 publications

References 12 publications

Arthropod eyes: The early Cambrian fossil record and divergent evolution of visual systems

Arthropod eyes: The early Cambrian fossil record and divergent evolution of visual systems

Late Ordovician Glaciation Initiated by Early Land Plant Evolution and Punctuated by Greenhouse Mass Extinctions

Multi-Segmented Arthropods from the Middle Cambrian of British Columbia (Canada)

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