000150323 001__ 150323
000150323 005__ 20251017144612.0
000150323 0247_ $$2doi$$a10.1016/j.palaeo.2021.110526
000150323 0248_ $$2sideral$$a125859
000150323 037__ $$aART-2021-125859
000150323 041__ $$aeng
000150323 100__ $$0(orcid)0000-0002-7210-1033$$aMoreno-Azanza M.
000150323 245__ $$aRecognizing a lost nesting ground: First unambiguous Testudines eggshells from the Eocene, associated with the pleurodiran Eocenochelus (Huesca, Northern Spain)
000150323 260__ $$c2021
000150323 5060_ $$aAccess copy available to the general public$$fUnrestricted
000150323 5203_ $$aThe Eocene record of turtle eggshells is scarce, with a single unconfirmed report from France. This scarcity contrasts with the great abundance of osteological remains, distributed over a wide palaeogeographical range as a result of climatic warmth. In this paper, we describe the first definitive Eocene Testudoolithidae eggshell fragments attributable to Testudines, most likely pleurodiran turtles, from the Eocene Sobrarbe Formation at the Castejón de Sobrarbe fossil site (CS-41) in northern Spain. The eggshells were found in association with osteological remains of at least four individuals of Eocenochelus eremberti (Pleurodira, Erymnochelyini) in an otherwise sirenian-dominated bonebed. Analysis of eggshell ultra- and microstructure allows comparison with eggshells from fossil and extant turtles. The eggshells are highly recrystallized but preserve relics of their original aragonitic radial ultrastructure as crystal phantoms. The barrel-shaped shell units, which are taller than wide, with compactituberculate ornamentation and funnel-shaped pore openings are similar to those of the Palaeocene ootaxon Haininchelys curiosa, whose holotype and paratype have been lost. The CS-41 eggshells are most similar to those of the pleurodiran Erymnochelys madagascariensis from Madagascar, the closest living relative to Eocenochelus, further supporting our attribution. Sedimentological and taphonomic analysis of the assemblage supports the hypothesis that the CS-41 fossil site was formed as the infilling of an abandoned tributary channel in the deltaic plain by an overbank or debris-flow deposit associated with a storm event. This storm resulted in the exhumation and subsequent re-sedimetation of the remains of a nesting ground of Eocenochelus eremberti, an otherwise coastal turtle, which would have entered inland streams to nest in the sand bars at the mouth of the Sobrarbe Deltaic Complex. © 2021 Elsevier B.V.
000150323 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E18-17R$$9info:eu-repo/grantAgreement/ES/MINECO/CGL2013-47521-P$$9info:eu-repo/grantAgreement/ES/MINECO/CGL2017-85038-P
000150323 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
000150323 590__ $$a3.565$$b2021
000150323 591__ $$aPALEONTOLOGY$$b2 / 54 = 0.037$$c2021$$dQ1$$eT1
000150323 591__ $$aGEOGRAPHY, PHYSICAL$$b22 / 50 = 0.44$$c2021$$dQ2$$eT2
000150323 591__ $$aGEOSCIENCES, MULTIDISCIPLINARY$$b78 / 202 = 0.386$$c2021$$dQ2$$eT2
000150323 592__ $$a1.076$$b2021
000150323 593__ $$aEarth-Surface Processes$$c2021$$dQ1
000150323 593__ $$aPaleontology$$c2021$$dQ1
000150323 593__ $$aEcology, Evolution, Behavior and Systematics$$c2021$$dQ1
000150323 594__ $$a5.7$$b2021
000150323 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000150323 700__ $$aDíaz-Berenguer E.$$uUniversidad de Zaragoza
000150323 700__ $$aSilva-Casal R.
000150323 700__ $$aPérez-García A.
000150323 700__ $$aBadiola A.
000150323 700__ $$0(orcid)0000-0003-1732-9155$$aCanudo J.I.$$uUniversidad de Zaragoza
000150323 7102_ $$12000$$2655$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Paleontología
000150323 773__ $$g576 (2021), 110526 [15 pp]$$pPalaeogeogr. palaeoclimatol. palaeoecol.$$tPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY$$x0031-0182
000150323 8564_ $$s1843207$$uhttps://zaguan.unizar.es/record/150323/files/texto_completo.pdf$$yPostprint
000150323 8564_ $$s936362$$uhttps://zaguan.unizar.es/record/150323/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000150323 909CO $$ooai:zaguan.unizar.es:150323$$particulos$$pdriver
000150323 951__ $$a2025-10-17-14:17:45
000150323 980__ $$aARTICLE