{"id":"https://openalex.org/W7165773384","doi":"https://doi.org/10.5852/cr-palevol2026v25a10","title":"Degeneraster spenceri n. gen., n. sp. (Asteroidea; Ordovician) and interpretating the early history of the Asterozoa","display_name":"Degeneraster spenceri n. gen., n. sp. (Asteroidea; Ordovician) and interpretating the early history of the Asterozoa","publication_year":2026,"publication_date":"2026-06-24","ids":{"openalex":"https://openalex.org/W7165773384","doi":"https://doi.org/10.5852/cr-palevol2026v25a10"},"language":"fr","primary_location":{"id":"doi:10.5852/cr-palevol2026v25a10","doi":"https://doi.org/10.5852/cr-palevol2026v25a10","is_oa":true,"landing_page_url":"https://doi.org/10.5852/cr-palevol2026v25a10","pdf_url":null,"source":{"id":"https://openalex.org/S170546617","display_name":"Comptes Rendus Palevol","issn_l":"1631-0683","issn":["1631-0683","1777-571X"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","ddh","doaj","dongbi-c","jufo-1","norway-1","poland-140","russia-white-list-2"],"host_organization":"https://openalex.org/P4310311095","host_organization_name":"Mus\u00e9um national d'histoire naturelle","host_organization_lineage":["https://openalex.org/P4310311095"],"host_organization_lineage_names":["Mus\u00e9um national d'histoire naturelle"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Comptes Rendus Palevol","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"diamond","oa_url":"https://doi.org/10.5852/cr-palevol2026v25a10","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5077352677","display_name":"Daniel B. Blake","orcid":"https://orcid.org/0000-0001-5774-1078","observed_orcids":["https://orcid.org/0000-0001-5774-1078"]},"institutions":[{"id":"https://openalex.org/I157725225","display_name":"University of Illinois Urbana-Champaign","ror":"https://ror.org/047426m28","country_code":"US","type":"education","lineage":["https://openalex.org/I157725225"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Daniel B. BLAKE","raw_affiliation_strings":["Departement of Earth Sciences and Environmental Change, University of Illinois, 1301 W. Green St., Urbana, IL (United States)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Departement of Earth Sciences and Environmental Change, University of Illinois, 1301 W. Green St., Urbana, IL (United States)","institution_ids":["https://openalex.org/I157725225"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5006516438","display_name":"Bertrand Lef\u00e8bvre","orcid":"https://orcid.org/0000-0002-3803-9176","observed_orcids":["https://orcid.org/0000-0002-3803-9176","https://orcid.org/0000-0002-1463-4632"]},"institutions":[{"id":"https://openalex.org/I100532134","display_name":"Lyon 1 Universit\u00e9","ror":"https://ror.org/029brtt94","country_code":"FR","type":"education","lineage":["https://openalex.org/I100532134","https://openalex.org/I203339264"]},{"id":"https://openalex.org/I1294671590","display_name":"Centre National de la Recherche Scientifique","ror":"https://ror.org/02feahw73","country_code":"FR","type":"government","lineage":["https://openalex.org/I1294671590"]},{"id":"https://openalex.org/I4210155927","display_name":"Laboratoire de G\u00e9ologie de Lyon : Terre, Plan\u00e8tes et Environnement","ror":"https://ror.org/04t89f389","country_code":"FR","type":"facility","lineage":["https://openalex.org/I100532134","https://openalex.org/I113428412","https://openalex.org/I1294671590","https://openalex.org/I203339264","https://openalex.org/I4210155927","https://openalex.org/I4405259976"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Bertrand LEFEBVRE","raw_affiliation_strings":["Universit\u00e9 Claude Bernard Lyon 1, CNRS, LGL-TPE, 2 rue Rapha\u00ebl Dubois, F-69622 Villeurbanne cedex (France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Universit\u00e9 Claude Bernard Lyon 1, CNRS, LGL-TPE, 2 rue Rapha\u00ebl Dubois, F-69622 Villeurbanne cedex (France)","institution_ids":["https://openalex.org/I100532134","https://openalex.org/I1294671590","https://openalex.org/I4210155927"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":4,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.39388078,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"25","issue":"10","first_page":"173","last_page":"187"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10109","display_name":"Paleontology and Stratigraphy of Fossils","score":0.430400013923645,"subfield":{"id":"https://openalex.org/subfields/1911","display_name":"Paleontology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10109","display_name":"Paleontology and Stratigraphy of Fossils","score":0.430400013923645,"subfield":{"id":"https://openalex.org/subfields/1911","display_name":"Paleontology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10955","display_name":"Paleontology and Evolutionary Biology","score":0.33180001378059387,"subfield":{"id":"https://openalex.org/subfields/1911","display_name":"Paleontology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12841","display_name":"Echinoderm biology and ecology","score":0.1420000046491623,"subfield":{"id":"https://openalex.org/subfields/1104","display_name":"Aquatic Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/sea-stars","display_name":"sea stars","score":0.8510000109672546},{"id":"https://openalex.org/keywords/asterozoa","display_name":"Asterozoa","score":0.5740000009536743},{"id":"https://openalex.org/keywords/ordovician","display_name":"Ordovician","score":0.6420000195503235},{"id":"https://openalex.org/keywords/katian","display_name":"Katian","score":0.7319999933242798},{"id":"https://openalex.org/keywords/new-genera-and-species","display_name":"new genus and species","score":0.7639999985694885},{"id":"https://openalex.org/keywords/paleozoic","display_name":"Paleozoic","score":0.5730000138282776}],"concepts":[{"id":"https://openalex.org/C13106087","wikidata":"https://www.wikidata.org/wiki/Q75507","display_name":"Paleozoic","level":2,"score":0.8942000269889832},{"id":"https://openalex.org/C91442348","wikidata":"https://www.wikidata.org/wiki/Q62100","display_name":"Ordovician","level":2,"score":0.678600013256073},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.6775000095367432},{"id":"https://openalex.org/C157369684","wikidata":"https://www.wikidata.org/wiki/Q34740","display_name":"Genus","level":2,"score":0.4377000033855438},{"id":"https://openalex.org/C2778024521","wikidata":"https://www.wikidata.org/wiki/Q55639806","display_name":"Basal (medicine)","level":3,"score":0.43320000171661377},{"id":"https://openalex.org/C58142911","wikidata":"https://www.wikidata.org/wiki/Q3863","display_name":"Asteroid","level":2,"score":0.4018999934196472},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.39959999918937683},{"id":"https://openalex.org/C146357865","wikidata":"https://www.wikidata.org/wiki/Q1123245","display_name":"Stage (stratigraphy)","level":2,"score":0.38510000705718994},{"id":"https://openalex.org/C53553401","wikidata":"https://www.wikidata.org/wiki/Q47307","display_name":"Genealogy","level":1,"score":0.34689998626708984},{"id":"https://openalex.org/C2776502983","wikidata":"https://www.wikidata.org/wiki/Q690182","display_name":"Contrast (vision)","level":2,"score":0.3456000089645386},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.32199999690055847},{"id":"https://openalex.org/C3017739461","wikidata":"https://www.wikidata.org/wiki/Q40285","display_name":"New guinea","level":2,"score":0.3140000104904175},{"id":"https://openalex.org/C95457728","wikidata":"https://www.wikidata.org/wiki/Q309","display_name":"History","level":0,"score":0.2847999930381775},{"id":"https://openalex.org/C78458016","wikidata":"https://www.wikidata.org/wiki/Q840400","display_name":"Evolutionary biology","level":1,"score":0.2766999900341034},{"id":"https://openalex.org/C77928131","wikidata":"https://www.wikidata.org/wiki/Q193343","display_name":"Tectonics","level":2,"score":0.26089999079704285},{"id":"https://openalex.org/C182306322","wikidata":"https://www.wikidata.org/wiki/Q1779371","display_name":"Order (exchange)","level":2,"score":0.2554999887943268},{"id":"https://openalex.org/C149923435","wikidata":"https://www.wikidata.org/wiki/Q37732","display_name":"Demography","level":1,"score":0.25270000100135803},{"id":"https://openalex.org/C90856448","wikidata":"https://www.wikidata.org/wiki/Q431","display_name":"Zoology","level":1,"score":0.2517000138759613},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.25029999017715454}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.5852/cr-palevol2026v25a10","doi":"https://doi.org/10.5852/cr-palevol2026v25a10","is_oa":true,"landing_page_url":"https://doi.org/10.5852/cr-palevol2026v25a10","pdf_url":null,"source":{"id":"https://openalex.org/S170546617","display_name":"Comptes Rendus Palevol","issn_l":"1631-0683","issn":["1631-0683","1777-571X"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","ddh","doaj","dongbi-c","jufo-1","norway-1","poland-140","russia-white-list-2"],"host_organization":"https://openalex.org/P4310311095","host_organization_name":"Mus\u00e9um national d'histoire naturelle","host_organization_lineage":["https://openalex.org/P4310311095"],"host_organization_lineage_names":["Mus\u00e9um national d'histoire naturelle"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Comptes Rendus Palevol","raw_type":"journal-article"},{"id":"pmh:oai:HAL:hal-05768142v1","doi":null,"is_oa":true,"landing_page_url":"https://hal.science/hal-05768142","pdf_url":null,"source":{"id":"https://openalex.org/S4306402512","display_name":"HAL","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I4405252976","host_organization_name":"Centre pour la Communication Scientifique Directe","host_organization_lineage":["https://openalex.org/I4405252976"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Comptes Rendus. Palevol, 2026, 25, pp.173 - 187. &#x27E8;10.5852/cr-palevol2026v25a10&#x27E9;","raw_type":"info:eu-repo/semantics/article"},{"id":"pmh:oai:zenodo.org:20849626","doi":null,"is_oa":true,"landing_page_url":"https://doi.org/10.5852/cr-palevol2026v25a10","pdf_url":null,"source":{"id":"https://openalex.org/S4306400562","display_name":"Zenodo (CERN European Organization for Nuclear Research)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I67311998","host_organization_name":"European Organization for Nuclear Research","host_organization_lineage":["https://openalex.org/I67311998"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Comptes Rendus Palevol, 25(10), 173-187, (2026-06-24)","raw_type":"info:eu-repo/semantics/article"}],"best_oa_location":{"id":"doi:10.5852/cr-palevol2026v25a10","doi":"https://doi.org/10.5852/cr-palevol2026v25a10","is_oa":true,"landing_page_url":"https://doi.org/10.5852/cr-palevol2026v25a10","pdf_url":null,"source":{"id":"https://openalex.org/S170546617","display_name":"Comptes Rendus Palevol","issn_l":"1631-0683","issn":["1631-0683","1777-571X"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","ddh","doaj","dongbi-c","jufo-1","norway-1","poland-140","russia-white-list-2"],"host_organization":"https://openalex.org/P4310311095","host_organization_name":"Mus\u00e9um national d'histoire naturelle","host_organization_lineage":["https://openalex.org/P4310311095"],"host_organization_lineage_names":["Mus\u00e9um national d'histoire naturelle"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Comptes Rendus Palevol","raw_type":"journal-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":46,"referenced_works":["https://openalex.org/W1892581773","https://openalex.org/W2000645917","https://openalex.org/W2010906684","https://openalex.org/W2018950887","https://openalex.org/W2041617706","https://openalex.org/W2049951869","https://openalex.org/W2059355631","https://openalex.org/W2098271878","https://openalex.org/W2100203741","https://openalex.org/W2101544128","https://openalex.org/W2115943503","https://openalex.org/W2126073551","https://openalex.org/W2132746356","https://openalex.org/W2133495658","https://openalex.org/W2135899241","https://openalex.org/W2148356608","https://openalex.org/W2161013948","https://openalex.org/W2166535547","https://openalex.org/W2172414993","https://openalex.org/W2189544047","https://openalex.org/W2217534310","https://openalex.org/W2319357673","https://openalex.org/W2345113370","https://openalex.org/W2478896213","https://openalex.org/W2500940407","https://openalex.org/W2606530652","https://openalex.org/W2784294010","https://openalex.org/W2894071242","https://openalex.org/W2898742448","https://openalex.org/W2899046662","https://openalex.org/W2899192444","https://openalex.org/W2899264618","https://openalex.org/W2899497339","https://openalex.org/W2906186636","https://openalex.org/W2965378986","https://openalex.org/W3014711072","https://openalex.org/W3121796778","https://openalex.org/W3210674805","https://openalex.org/W4214854789","https://openalex.org/W4238505229","https://openalex.org/W4284885772","https://openalex.org/W4285299410","https://openalex.org/W4399126005","https://openalex.org/W4403951544","https://openalex.org/W4415846863","https://openalex.org/W7125674773"],"related_works":["https://openalex.org/W4399126005","https://openalex.org/W4403951544","https://openalex.org/W2100203741","https://openalex.org/W2523122172","https://openalex.org/W2175500652","https://openalex.org/W2179088057","https://openalex.org/W3121796778","https://openalex.org/W4415846863","https://openalex.org/W3014711072","https://openalex.org/W2189544047"],"abstract_inverted_index":{"Degeneraster":[0,83],"spenceri":[1,37,53,84,132,179],"n.":[2,4,38,40,54,56,85,87,127,133,135,180,182],"gen.,":[3,39,55,86,134,181],"sp.,":[5,136],"a":[6],"new":[7,124],"genus":[8],"and":[9,28,35,49,106,139,146,163,173,184],"species":[10],"of":[11,23,122],"Asteroidea":[12,93],"de":[13],"Blainville,":[14],"1830":[15],"(\u00adEchinodermata)":[16],"from":[17],"the":[18,61,101,120,123,140,155],"Late":[19],"Ordovician":[20],"(middle":[21],"Katian)":[22],"Morocco,":[24],"is":[25,58,89,104],"described.":[26],"Similarities":[27],"differences":[29],"between":[30],"basal":[31,62],"Somasteroidea":[32],"Spencer,":[33],"1951":[34],"D.":[36,52,131,178],"sp.":[41,57,88,183],"are":[42,75,148,171],"reviewed.":[43],"Based":[44],"on":[45],"ambulacral":[46],"(i.e.,":[47],"axial":[48],"adaxial)":[50],"morphology,":[51],"assigned":[59],"to":[60],"asteroid":[63,142],"order":[64],"Euaxosida":[65],"Blake,":[66,166],"2018;":[67],"extraxial":[68],"morphology":[69],"in":[70,94],"contrast":[71],"includes":[72],"expressions":[73,116],"that":[74],"widely":[76],"found":[77],"among":[78,91,111,130],"more":[79],"derived":[80,141],"Paleozoic":[81,143],"asterozoans.":[82],"anomalous":[90],"euaxosidan":[92],"lacking":[95],"an":[96],"ambital":[97],"framework.":[98],"In":[99],"addition,":[100],"aboral":[102],"skeleton":[103],"distinctive,":[105],"podial":[107],"pores,":[108],"otherwise":[109],"undocumented":[110],"euaxosidans,":[112],"might":[113],"occur.":[114],"Atypical":[115],"provide":[117],"basis":[118],"for":[119,175],"recognition":[121],"family":[125],"Degenerasteridae":[126],"fam.":[128],"Differences":[129],"other":[137,185],"Euaxosida,":[138],"orders":[144],"Hadrosida":[145],"Kermasida":[147],"surveyed.":[149],"To":[150],"exemplify":[151],"early":[152,186],"asterozoan":[153],"diversity,":[154],"ophiuroid":[156],"Componaster":[157],"Glass,":[158],"Blake":[159],"&":[160,168],"Lefebvre,":[161],"2024":[162],"unassigned":[164],"Falloaster":[165],"Gahn":[167],"Guensburg,":[169],"2020a,":[170],"cited":[172],"\u00adillustrated":[174],"comparison":[176],"with":[177],"Asterozoa.":[187]},"counts_by_year":[],"updated_date":"2026-10-25T09:29:13.331239","created_date":"2026-06-25T00:00:00"}
