Evidence map›Paper›PMID 28211461›Full record

ArticleScientific reports2017

A xandarellid artiopodan from Morocco - a middle Cambrian link between soft-bodied euarthropod communities in North Africa and South China.

Javier Ortega-Hernández, Abdelfattah Azizi, Thomas W Hearing, Thomas H P Harvey, Gregory D Edgecombe, Ahmid Hafid, Khadija El Hariri

Erratum issuedAbstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors.

Javier Ortega-HernándezDepartment of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK.
Abdelfattah AziziDépartement Sciences de la Terre, Faculté des Sciences et Techniques-Guéliz, Université Cadi Ayyad, Avenue Abdelkrim el Khattabi BP 549, 40000 Marrakech, Morocco.
Thomas W HearingDepartment of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK.
Thomas H P HarveyDepartment of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK.
Gregory D EdgecombeDepartment of Earth Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, UK.
Ahmid HafidDépartement Sciences de la Terre, Faculté des Sciences et Techniques-Guéliz, Université Cadi Ayyad, Avenue Abdelkrim el Khattabi BP 549, 40000 Marrakech, Morocco.
Khadija El HaririDépartement Sciences de la Terre, Faculté des Sciences et Techniques-Guéliz, Université Cadi Ayyad, Avenue Abdelkrim el Khattabi BP 549, 40000 Marrakech, Morocco.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Xandarellida is a well-defined clade of Lower Palaeozoic non-biomineralized artiopodans that is exclusively known from the early Cambrian (Stage 3) Chengjiang biota of South China. Here we describe a new member of this group, Xandarella mauretanica sp. nov., from the middle Cambrian (Stage 5) Tatelt Formation of Morocco, making this the first non-trilobite Cambrian euarthropod known from North Africa. X. mauretanica sp. nov. represents the youngest occurrence of Xandarellida - extending its stratigraphic range by approximately 10 million years - and expands the palaeobiogeographic distribution of the group to the high southern palaeolatitudes of West Gondwana. The new species provides insights into the lightly sclerotized ventral anatomy of Xandarellida, and offers stratigraphically older evidence for a palaeobiogeographic connection between Burgess Shale-type euarthropod communities in North Africa and South China, relative to the (Tremadocian) Fezouata biota.

Indexed as

Extinction, BiologicalPhylogenyAnimalsArthropodsBiological EvolutionChinaFossilsGeologic SedimentsMoroccoPaleontologyPhylogeography

Identifiers

PMID28211461
PMCPMC5314411

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.