首页|Late Ordovician cornulitid tubeworms from high-latitude peri-Gondwana(Sardinia and the Pyrenees)and their palaeobiogeographic significance

Late Ordovician cornulitid tubeworms from high-latitude peri-Gondwana(Sardinia and the Pyrenees)and their palaeobiogeographic significance

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Seven Cornulites species,including a new one-Cornulites leonei n.sp.,are described from the Upper Ordovician Portixeddu Formation(Katian,stage slices Ka2-3)of Sardinia and the Cavá(lower Katian,stage slice Ka2)and Estana(upper Katian,stage slices Ka3-4)formations of the Pyrenees.The Sardinian and Pyrenean cornulitids represent an adaptation to live in environments with high sedimentation rates and limited hard substrates availability.Their prominent annuli could have had a stabilizing function in the soft sediment that helped cornulitids to keep a favourable position in the sediment to enable suspension feeding.The known Late Ordovician cornulitid diversity in different Gondwana areas is low,usually ranging from one to three taxa,being higher(seven)in Sardinia.Like other benthic groups during the Late Ordovician,the cornulitid tubeworm faunas within the high-latitude peri-Gondwana Province indicate a certain endemism and share morphological and ecological affinities,such as a small body size and tubes with a strikingly small apical angle.Although essentially endemic,some links with cornulitids from the Late Ordovician of Scotland are revealed.

Tentaculitid tubewormsCornulitesMediterraneanPalaeoecologyKatian

Olev Vinn、Jorge Colmenar、Samuel Zamora、Sofia Pereira、Gian Luigi Pillola、Abdullah A.Alkahtane、Saleh Al Farraj、Magdy El Hedeny

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Institute of Ecology and Earth Sciences,University of Tartu,Ravila 14A,50411 Tartu,Estonia

Instituto Geológico y Minero de España-CSIC,La Calera 1,28760 Tres Cantos,Spain

Instituto Geológico y Minero de España-CSIC,Residencia CSIC,Campus Aula Dei,Avenue Montañana 1005,50006 Zaragoza,Spain

Centro de Geociencias,Departamento de Ciências da Terra,Universidade de Coimbra,Rua Sílvio Lima,3030-790 Coimbra,Portugal

Dipartimento di Scienze Chimiche e Geologiche,Università degli Studi di Cagliari,Cittadella Universitaria,Blocco A,09042 Monserrato,Italy

College of Science,King Saud University,Kingdom of Saudi Arabia

Geology Department,Faculty of Science,Alexandria University,Egypt

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2024

10.1016/j.jop.2024.08.009

古地理学报(英文版)

古地理学报(英文版)

影响因子：0.186
ISSN：
年,卷(期)：2024.13(4)