A Cambrian micro-lobopodian and the evolution of arthropod locomotion and reproduction

  title={A Cambrian micro-lobopodian and the evolution of arthropod locomotion and reproduction},
  author={Andreas Maas and Georg Mayer and Reinhardt M{\o}bjerg Kristensen and Dieter Waloszek},
  journal={Chinese Science Bulletin},
The evolutionary success of arthropods, the most abundant and diverse animal group, is mainly based on their segmented body and jointed appendages, features that had evolved most likely already before the Cambrian. The first arthropod-like animals, the lobopodians from the Early Cambrian, were unsclerotized and worm-like, and they had unjointed tubular legs. Here we describe the first three-dimensionally preserved Cambrian lobopodian. The material presented of Orstenotubulus evamuellerae gen… 

An armoured Cambrian lobopodian from China with arthropod-like appendages

D. cactiformis is described as an ‘armoured’ lobopodian from the Chengjiang fossil Lagerstätte (Cambrian Stage 3), Yunnan, southwestern China, remarkable for possessing robust and probably sclerotized appendages, with what appear to be articulated elements.

The morphology and phylogenetic position of the Cambrian lobopodian Diania cactiformis

This study challenges the previous description of anteroposterior orientation, terminal claws and trunk tagmosis as expressed by differentiated anterior and posterior appendages in Cambrian lobopodians, and revisits the phylogeny of stem arthropods.

A Carboniferous Non-Onychophoran Lobopodian Reveals Long-Term Survival of a Cambrian Morphotype

Cambrian lobopodians and extant onychophorans provide new insights into early cephalization in Panarthropoda

New material of the early Cambrian lobopodian Onychodictyon ferox from southern China is described, which reveals hitherto unknown head structures, including a proboscis with a terminal mouth, an anterior arcuate sclerite, a pair of ocellus-like eyes and branched, antenniform appendages associated with this ocular segment.

A Rare Onychophoran-Like Lobopodian from the Lower Cambrian Chengjiang Lagerstätte, Southwestern China, and its Phylogenetic Implications

Antennacanthopodia gracilis new genus and species is described and interpreted here as an “unarmoured” lobopodian from the Chengjiang fossil Lagerstätte (Early Cambrian, ∼520 Ma), Yunnan, southwestern China, furthers the understanding of early lobopODian diversification.

A Possible Larval Roundworm from the Cambrian 'Orsten' and Its Bearing on the Phylogeny of Cycloneuralia

Shergoldana australiensis is presented here as possibly the first record of a free-living immature cycloneuralian from the Cambrian, even if it remains uncertain whether it has closer affinities to the one or other in-group.

A Cambrian unarmoured lobopodian, †Lenisambulatrix humboldti gen. et sp. nov., compared with new material of †Diania cactiformis

  • Q. OuG. Mayer
  • Geography, Environmental Science
    Scientific Reports
  • 2018
The study augments the morphological diversity of Cambrian lobopodians and presents two evolutionary extremes of cuticular ornamentation: one represented by the Humboldt lobopODian, which was most likely entirely “naked”, the other epitomized by †D.

Onychophoran-like musculature in a phosphatized Cambrian lobopodian

This first report of Palaeozoic onychophoranMusculature establishes peripheral musculature as a characteristic of the ancestral panarthropod, but documents an unexpected muscular configuration in a new early Cambrian (Stage 3) lobopodian.

Early Crustacean Evolution and the Appearance of Epipodites and Gills

The recently discovered Yicaris dianensis from the Lower Cambrian demonstrates not only the presence but also the morphogenesis of three epipodites on all post-maxillulary appendages, and may be a valuable model for understanding the evolutionary origin of epipadites.



A rare lobopod with well-preserved eyes from Chengjiang Lagerstätte and its implications for origin of arthropods

The discovery of the rare transitional form may throw new light on the origin of arthropod and suggests that the most primitive arthropods began with paired uniramous legs and the biramous ones evolved later.

Cambrian Derivatives of the Early Arthropod Stem Lineage, Pentastomids, Tardigrades and Lobopodians An ‘Orsten’ Perspective

‘Orsten’-type preservation is the phosphatisation of cuticular surfaces without any further deformation and has yielded completely three-dimensional fossils, mainly arthropods at scale of 100 μm—2 mm, implying that the ancestry of Arthropoda lies even further back well in the Pre-Cambrian.

Early Cambrian lobopodian sclerites and associated fossils from Kazakhstan

A low diversity fossil assemblage dominated by Mongolitubulus spines, from the Early Cambrian Geres Member of the Shabakhty Formation at Koksu, Malyi Karatau, Kazakhstan, enables identification of

A large xenusiid lobopod with complex appendages from the Lower Cambrian Chengjiang Lagerstätte

A large lobopod, Jianshanopodia decora gen. et sp. nov., with body length (excluding appendages) about 220 mm from the Lower Cambrian Haikou section, near Kunming, Yunnan, southwest China, shows a

New early Cambrian animal and onychophoran affinities of enigmatic metazoans

A new 'armoured lobopod' from the Chengjiang fauna is described and shows close affinity with the enigmatic Microdictyon, and soft-part anatomy suggests that the group has affinities with the Burgess Shale 'lobopod', Aysheaia.

Phylogeny and life habits of early arthropods - Predation in the Early Cambrian Sea

It is hypothesized that the new species and many others, if not all of the “great-appendage” arthropods were derivatives of the chelicerate stem lineage and not forms having branched off at different nodes along the evolutionary lineage of the Arthropoda.

The ‘Orsten’ window — a three-dimensionally preserved Upper Cambrian meiofauna and its contribution to our understanding of the evolution of Arthropoda

The presence of these “pre-euarthropods,” which lack, or partly lack, characteristic features developed later in the arthropod evolutionary lineage, and the recent record of phosphatocopine Crustacea in the earliest Palaeozoic are regarded as a support for the view that the ancestry of Arthropoda lies much further back, possibly well in the late Pre-Cambrian.


It is suggested that the lobopodians, phylum Lobopodia, are arranged in two classes, the extinct Xenusia for marine forms, and the Onychophora for terrestrial forms.

The Lobopod Animal Aysheaia pedunculata Walcott, Middle Cambrian, Burgess Shale, British Columbia

Aysheaia pedunculata is one of the rarer animals in the Burgess Shale, occurring in association with arthropods and worms, and to an exceptional extent with sponge fragments, and it is not placed in either group, nor in any taxon of higher rank than Family Aysheaiidae.