New fossils of the early Miocene stem-cervid Acteocemas (Artiodactyla, Ruminantia) from the Iberian Peninsula shed light on the evolutionary origin of deer antler regeneration
Azanza, Beatriz (Universidad de Zaragoza) ; Pina, Marta ; Quiralte, Victoria ; Sánchez, Israel M. ; DeMiguel, Daniel
Resumen: Acteocemas, a very poorly documented early Miocene stem-cervid, is one of the first ruminants bearing antler-like appendages, which has provided a ground for discussion on the origin of antlers. We describe a new and very complete appendage from the site of Sant Andreu de la Barca (Spain) together with some other unpublished specimens from the nearby Costablanca attributed to Acteocemas aff. infans, compare with fossils from elsewhere in Europe (including the A. infans holotype), and perform micro-CT scans. The findings provide new empirical data that Acteocemas protoantlers were able to be cast and re-grown. However, microstructural analyses suggest that the protoantler lifespan could be longer than that of modern antlers, preventing it from assuming a similar cycle. Results support that increased seasonality associated with a drop in global temperatures played a role in the origin of antler regeneration, and that deciduousness (through bone shedding) was an efficient way for (male)deer to reduce the seasonal leftover of bone mass. The early evolution of deciduousness, as in the probable irregular protoanter cycle of Acteocemas, was limited by the warming ca. 17–15 Ma, whereas the emergence of antlers with coronet was concomitant with the second increase in seasonality associated to the cooling ca. 15–13 Ma.
Idioma: Inglés
DOI: 10.1080/08912963.2022.2050720
Año: 2022
Publicado en: Historical Biology 34, 8 (2022), 1520-1533
ISSN: 0891-2963
Factor impacto JCR: 1.4 (2022)
Categ. JCR: PALEONTOLOGY rank: 30 / 54 = 0.556 (2022) - Q3 - T2
Factor impacto CITESCORE: 3.5 - Agricultural and Biological Sciences (Q2)
Factor impacto SCIMAGO: 0.551 - Agricultural and Biological Sciences (miscellaneous) (Q1)
Financiación: info:eu-repo/grantAgreement/ES/DGA/E33-20R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2020-116220GB-I00
Tipo y forma: Article (PostPrint)
Área (Departamento): Área Paleontología (Dpto. Ciencias de la Tierra)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
Exportado de SIDERAL (2025-10-17-14:28:20)
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Idioma: Inglés
DOI: 10.1080/08912963.2022.2050720
Año: 2022
Publicado en: Historical Biology 34, 8 (2022), 1520-1533
ISSN: 0891-2963
Factor impacto JCR: 1.4 (2022)
Categ. JCR: PALEONTOLOGY rank: 30 / 54 = 0.556 (2022) - Q3 - T2
Factor impacto CITESCORE: 3.5 - Agricultural and Biological Sciences (Q2)
Factor impacto SCIMAGO: 0.551 - Agricultural and Biological Sciences (miscellaneous) (Q1)
Financiación: info:eu-repo/grantAgreement/ES/DGA/E33-20R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2020-116220GB-I00
Tipo y forma: Article (PostPrint)
Área (Departamento): Área Paleontología (Dpto. Ciencias de la Tierra)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2025-10-17-14:28:20)
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Record created 2025-01-28, last modified 2025-10-17