000167880 001__ 167880
000167880 005__ 20260121151420.0
000167880 0247_ $$2doi$$a10.1093/zoolinnean/zlaf167
000167880 0248_ $$2sideral$$a147560
000167880 037__ $$aART-2025-147560
000167880 041__ $$aeng
000167880 100__ $$0(orcid)0000-0003-2942-2840$$aBover, Pere
000167880 245__ $$aRevisiting the taxonomy and biogeography of the largest sigmodontine rodent (Rodentia, Cricetidae) through ancient DNA
000167880 260__ $$c2025
000167880 5060_ $$aAccess copy available to the general public$$fUnrestricted
000167880 5203_ $$aMegaoryzomys curioi, an extinct rodent endemic to the Galápagos Islands (Ecuador), is the largest known member of the diverse Sigmodontinae, a primarily Neotropical subfamily within the Cricetidae (Rodentia, Mammalia). Its tribal affiliation has long been debated, with past classifications assigning it to Oryzomyini, Thomasomyini, or even proposing its placement in a distinct tribe. In this study, we analyse mitochondrial sequences extracted from a topotypical specimen of M. curioi (Santa Cruz Island), within a densely sampled cricetid phylogenetic framework. Our results support its inclusion within Oryzomyini. Megaoryzomys is recovered as part of a clade that also includes the genera Aegialomys and Nesoryzomys, encompassing both Galapagoan and mainland representatives. These preliminary findings would support a scenario of two independent colonization events by oryzomyines: one ancient (∼4.3 Mya) and another more recent (∼0.3 Mya), each followed by insular diversification, to account for the known diversity of Galapagoan rodents (three genera and 11 species, including fossils and living forms). Moreover, the early origin and prolonged persistence of Megaoryzomys challenge the notion of the Galápagos as short-lived biogeographic units due to tectonic instability.
000167880 536__ $$9info:eu-repo/grantAgreement/ES/MCIU/FPU20/02030$$9info:eu-repo/grantAgreement/ES/UZ/IUCA
000167880 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000167880 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000167880 700__ $$aBrito, Jorge
000167880 700__ $$aCastellanos, Francisco X
000167880 700__ $$aCuéllar Soto, Erika
000167880 700__ $$aHutterer, Rainer
000167880 700__ $$0(orcid)0000-0002-0041-0507$$aAlfaro-Ibáñez, María Pilar$$uUniversidad de Zaragoza
000167880 700__ $$aMartín González, María Esther
000167880 700__ $$aTammone, Mauro N
000167880 700__ $$aPardiñas, Ulyses F J
000167880 7102_ $$12000$$2655$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Paleontología
000167880 773__ $$g205, 4 (2025), zlaf167 [1-13 pp.]$$pZool. j. Linn. Soc.$$tZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY$$x0024-4082
000167880 8564_ $$s5772677$$uhttps://zaguan.unizar.es/record/167880/files/texto_completo.pdf$$yVersión publicada
000167880 8564_ $$s2508676$$uhttps://zaguan.unizar.es/record/167880/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000167880 909CO $$ooai:zaguan.unizar.es:167880$$particulos$$pdriver
000167880 951__ $$a2026-01-21-14:55:29
000167880 980__ $$aARTICLE