Phylogeny and life habits of Early Arthropods—Predation in the Early Cambrian Sea*

Maas, Andreas; Waloszek, Dieter; Chen, Jun-Yuan; Braun, Andreas; Xiuqiang, Wang; Huang, Diying

doi:10.1080/10020070412331343301

Cited by 57 publications

(66 citation statements)

References 7 publications

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“…According to Maas et al (2004) (see also Waloszek et al 2005Waloszek et al , 2007Haug et al accepted a) these characters first appear in the ground pattern of Euarthropoda, but are not yet present in the ground pattern of Arthropoda s. str. Maas et al (2004) have already pointed to a stepwise acquisition of characters along the lineage towards Euarthropoda, exemplified by the morphology of the taxon Canadaspis. However, the different interpretations of the Chinese and the Canadian species of Canadaspis (Briggs 1978vs.…”

Section: Systematic and Evolutionary Implications Of Sarotrocercus Obmentioning

confidence: 99%

“…as well as in the ground pattern of Euarthropoda the prominent antennulae comprised 15 articles [(examples from Euarthropoda: Agnostus pisiformis (Wahlenberg, 1818), see Müller & Walossek (1987); certain anomalocarids, cf. Chen et al (2004); Kiisortoqia soperi Stein, 2010, see Stein (2010.…”

Section: Systematic and Evolutionary Implications Of Sarotrocercus Obmentioning

confidence: 99%

“…Arthropoda sensu lato (sensu Maas et al, 2004) Arthropoda sensu stricto (sensu Maas et al, 2004) Genus Sarotrocercus Whittington, 1981 * 1981 Sarotrocercus gen. nov. -Whittington, p. 347.…”

Section: Systematic Palaeontologymentioning

confidence: 99%

“…One taxon that was already supposed to fit "right in between" is Canadaspis (Maas et al 2004), but this has to be further investigated and just may mark a starting point for future research also on more of these early arthropod taxa. In either way, the search for species that have already developed some, but not (yet) all characters of Euarthropoda will greatly facilitate a more differentiated resolution of the early evolution of the sclerotized arthropods than what has been established until now.…”

mentioning

confidence: 99%

“…Especially the early steps along the evolutionary lineage of the taxon are still under debate. Waloszek and co-workers (Maas et al 2004;Waloszek et al 2005Waloszek et al , 2007 introduced a differentiated view on the distinct evolutionary levels within Arthropoda sensu lato. This taxon comprises Onychophora, the paraphyletic lobopodians, Tardigrada, Pentastomida, and Arthropoda sensu stricto (the sclerotised arthropods); Euarthropoda is an in-group of Arthropoda sensu stricto.…”

mentioning

confidence: 99%

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Sarotrocercus oblitus - Small arthropod with great impact on the understanding of arthropod evolution?

Haug¹,

Maas²,

Haug³

et al. 2011

Bull. Geosci.

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Sarotrocercus oblitus is a small arthropod from the Cambrian Burgess Shale. It was originally described with a short head with only two appendage-bearing segments (the first appendage being limb-shaped), a short trunk of nine segments and lamellate trunk limbs. This rather "unusual" morphology inspired various authors to propose evolutionary scenarios concerning segmentation and appendages. The head of S. oblitus served also for scenarios about the evolution of the arthropod head, because it seemed to document the evolutionary step between the level of Arthropoda sensu stricto (head with one appendage-bearing segment) and that of Euarthropoda (head comprising four appendage-bearing segments). Here we report that the morphology of S. oblitus differs in several significant aspects from its original description, e.g., in the composition of the head, number of trunk segments, and appendage morphology. In consequence, many earlier assumptions based on the original description must be rejected. Although the material consists of only seven individuals, ontogenetic variation of the number of trunk segments was observed, pointing to, at least, two developmental stages. Therefore, S. oblitus is morphologically less different from other Cambrian arthropods than previously thought, but possesses a head with three appendage-bearing segments and lacks a prominent antenn(ul)a. These characters point to a position of S. oblitus inside Arthropoda s. str., deriving from the lineage towards Euarthropoda. The morphology also indicates a special life style, e.g., by the presence of large, stalked eyes, apparently in convergence to one of the Cambrian "Orsten" crustacean stem-lineage derivatives, Henningsmoenicaris scutula.•

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Section: Systematic and Evolutionary Implications Of Sarotrocercus Obmentioning

confidence: 99%

Section: Systematic and Evolutionary Implications Of Sarotrocercus Obmentioning

confidence: 99%

“…Arthropoda sensu lato (sensu Maas et al, 2004) Arthropoda sensu stricto (sensu Maas et al, 2004) Genus Sarotrocercus Whittington, 1981 * 1981 Sarotrocercus gen. nov. -Whittington, p. 347.…”

Section: Systematic Palaeontologymentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Sarotrocercus oblitus - Small arthropod with great impact on the understanding of arthropod evolution?

Haug¹,

Maas²,

Haug³

et al. 2011

Bull. Geosci.

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show abstract

References

2017

The Cambrian Fossils of Chengjiang, China

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Distinguishing anomalocaridids from arthropods and priapulids

2006

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The Chengjiang fossil lagerstätte has yielded four described species of dinocaridids. These have been interpreted either as arthropods or as arthropod progenitors, occasionally with the anomalocaridid Parapeytoia yunnanensis serving as a link. This view is rejected both because anomalocaridids have a number of derived characters absent from early arthropods, and also because a shared origin gives a more parsimonious picture. Sclerites thought to belong to the mouth of P. yunnanensis differ fundamentally from those of its holotype and from those of other dinocaridids. It appears that they belong to a new large priapulid, described here as Omnidens amplus gen. et sp. nov.

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Phylogeny and life habits of Early Arthropods—Predation in the Early Cambrian Sea*

Cited by 57 publications

References 7 publications

Sarotrocercus oblitus - Small arthropod with great impact on the understanding of arthropod evolution?

Sarotrocercus oblitus - Small arthropod with great impact on the understanding of arthropod evolution?

References

Distinguishing anomalocaridids from arthropods and priapulids

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