Cambrian archaeocyathan metazoans: revision of morphological characters and standardization of genus descriptions to establish an online identification tool

Kerner, Adeline; Debrenne, Françoise; Vignes-Lebbe, Régine

doi:10.3897/zookeys.150.1566

Cited by 9 publications

(9 citation statements)

References 12 publications

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“…These softwares are dedicated to manage structured taxonomic descriptions, to analyse these descriptions and to produce keys (Kerner et al 2011, Corvez and Grand 2014, Martin et al 2015). A wiki and a documentation of Xper 3 are available at http://wiki.xper3.fr/index.php/UserManualXper3.…”

Section: Methodsmentioning

confidence: 99%

A multi-access identification key based on colour patterns in ladybirds (Coleoptera, Coccinellidae)

Jouveau¹,

Delaunay²,

Vignes-Lebbe³

et al. 2018

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An identification key based on French ladybird colouration is proposed for the tribes Chilocorini, Coccinellini, and Epilachnini. These tribes were chosen based on their relatively limited species diversity, as well as their large size and high colour diversity, making them easy to observe and collect. The identification key runs on Xper3 software, which allows the building of structured knowledge bases and online free-access keys. The online interactive Xper key is available at http://french-ladybird.identificationkey.fr.

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Section: Methodsmentioning

confidence: 99%

A multi-access identification key based on colour patterns in ladybirds (Coleoptera, Coccinellidae)

Jouveau¹,

Delaunay²,

Vignes-Lebbe³

et al. 2018

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“…Archaeocyathan gross morphology, cup shape, and elaboration (ridges, spines, troughs, etc.) for all valid genera of archaeocyaths ( N = 309) were gathered from the online database Archaeocyatha—A knowledge base (Kerner et al 2011). For comparison, all extant, marine taxa of ‘Demospongiae Sollas, 1885’, using the ‘only accepted names’ and ‘all records’ filters, were compiled from the World Porifera Database ( N = 6274).…”

Section: Methodsmentioning

confidence: 99%

Restricted morphospace occupancy of early Cambrian reef-building archaeocyaths

Cordie¹,

Dornbos²

2019

Paleobiology

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The evolution of novel morphologies can signify expansion of a clade into new niches. This can be studied in the fossil record by investigating the morphospace occupancy of organisms, with small morphospaces signifying low morphological disparity and more diffuse morphospaces suggesting a broader range of morphologies adapted to different environments. Morphological disparity of many taxa (arthropods, crinoids, etc.) from the Cambrian to modern intervals have been studied in this manner. However, no study has investigated this in archaeocyaths, which, as reef builders, can have a disproportionate effect on early Cambrian biodiversity relative to their frequency. Here, we collect morphological data on archaeocyathan sponges, mostly from Laurentia. More than 600 museum specimens and 400 field samples were measured for traditional morphometric characters and discrete gross morphological characteristics. We find that archaeocyaths have an average cup/individual (body) diameter of 10.6 mm. This is significantly smaller than a selected group of modern demosponges and lithistid sponges that measure 94.1 mm and 66.8 mm in diameter, respectively, and each has a larger size variance. Archaeocyathan gross morphologies are also highly constrained to a few simple morphologies (three to six categories), while modern demosponges and lithistids are more diverse (nine categories each). These data indicate that Laurentian archaeocyaths were restricted in their morphological disparity, potentially due to limitations imposed by having a robust calcareous skeleton while still maintaining a large intervallum cavity space to facilitate passive entrainment. The fact that these Cambrian reef builders were restricted in their morphological complexity may have had a strong influence on the biodiversity of early Phanerozoic ecosystems. Furthermore, a clade limited to only a few specific morphologies is at an increased risk of extinction.

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“…In the case of certain groups of sometimes doubtful taxonomic position, editorial decisions have been taken as to where they should presently be placed in the IRMNG hierarchy; such decisions can always be revisited if and when relevant new information is available. Specifically: Kerner et al (2011). This adds around 550 genus names in total (308 accepted) to "Porifera" as previously recognised (representing a slight increase in the proportion of fossil taxa), and reduces the number of recognised phyla in IRMNG accordingly • The phylum Lobopoda was introduced by Cavalier-Smith (1998) as a new phylum to include (extant) onychophorans and tardigrades, the latter being then reduced to subphyla.…”

Section: Taxonomic Arrangementmentioning

confidence: 99%

<p class="ZootaxaTitle">All genera of the world: an overview and estimates based on the March 2020 release of the Interim Register of Marine and Nonmarine Genera (IRMNG)

Rees

Vandepitte

Vanhoorne

et al. 2020

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We give estimated counts of known accepted genera of the world (301,108* ±62,998*, of which approximately 22% are fossil), and unaccepted genera (synonyms sensu lato: 190,741* ±62,998*), for “all life” based on the March 2020 release of the Interim Register of Marine and Nonmarine Genera (IRMNG); a further approx. 9,400* accepted genus names are anticipated to have been published over the period 2014–2019 that are not yet included in IRMNG. A breakdown of the data is presented by phylum and, in some cases, lower taxonomic group such as class or order; the actual lists of names on which the totals are based are available for query via the IRMNG web site and are also included as supplementary data to this paper. These data provide the most complete and consistent coverage of all kingdoms of life presently available in such a form and, despite their “interim” nature (not completely vetted by taxonomic experts, not all genera yet placed to family), serve to illustrate the scope of a project for a more detailed survey of “all genera of the world” as well as providing a comparison with existing lists (for example, to indicate names that may be missed from either side), and preliminary content that can be of value for the compilation of new lists. We note areas (chiefly very recently published names) where present IRMNG data may be incomplete and briefly discuss other issues encountered in the assembly of such data, including those associated with the construction of a unified/consensus classification within which genera and their containing families can be placed.

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Cambrian archaeocyathan metazoans: revision of morphological characters and standardization of genus descriptions to establish an online identification tool

Cited by 9 publications

References 12 publications

A multi-access identification key based on colour patterns in ladybirds (Coleoptera, Coccinellidae)

A multi-access identification key based on colour patterns in ladybirds (Coleoptera, Coccinellidae)

Restricted morphospace occupancy of early Cambrian reef-building archaeocyaths

<p class="ZootaxaTitle">All genera of the world: an overview and estimates based on the March 2020 release of the Interim Register of Marine and Nonmarine Genera (IRMNG)

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