Une faunule de mammifères insulaires dans le miocène moyen de majorque (iles baléares)

Mein, P.; Adrover, Rafael

doi:10.1016/s0016-6995(82)80133-2

Cited by 32 publications

(19 citation statements)

References 4 publications

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“…The dwarfing of large mammals on island is remarkably well illustrated by Pleistocene elephants (Sondaar 1977;Roth 1992), hippopotami (Simmons 1988), deer (Lister 1989, and sloths (Anderson and Handley 2002). Similarly, the trend toward gigantism of island rodents has been observed in numerous extant species (Hall 1938;Delany 1970;Heaney 1978;Vaughan and Schwartz 1980;Musser 1981;Lawlor 1982;Melton 1982; Davis 1983;Musser and Newcomb 1983;Angerbjö rn 1986;Collins and George 1990;Musser and Heaney 1992;Smith 1992;Libois et al 1993;Vigne et al 1993;Adler and Levins 1994;Adler 1996; Berry 1996;Ramalhinho et al 1996;Olmos 1997) as well as among some fossil species (Crusafont-Pairo and Petter 1964;Freudenthal 1976Freudenthal , 1985Brandy 1978;Mein and Adrover 1982;Daams and Freudenthal 1985;Agusti 1986;Hutterer et al 1988;Vigne 1992;Biknevicius et al 1993;Mezzabotta et al 1996;Michaux et al 1996;Millien and Jaeger 2001). However, not all island rodent populations show strong body size differences from mainland populations (Foster 1964; Case 1978;Lomolino 1985).…”

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confidence: 86%

Climate Change and Size Evolution in an Island Rodent Species: New Perspectives on the Island Rule

2004

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Abstract. As stated by the island rule, small mammals evolve toward gigantism on islands. In addition they are known to evolve faster than their mainland counterparts. Body size in island mammals may also be influenced by geographical climatic gradients or climatic change through time. We tested the relative effects of climate change and isolation on the size of the Japanese rodent Apodemus speciosus and calculated evolutionary rates of body size change since the last glacial maximum (LGM). Currently A. speciosus populations conform both to Bergmann's rule, with an increase in body size with latitude, and to the island rule, with larger body sizes on small islands. We also found that fossil representatives of A. speciosus are larger than their extant relatives. Our estimated evolutionary rates since the LGM show that body size evolution on the smaller islands has been less than half as rapid as on Honshu, the mainland-type large island of Japan. We conclude that island populations exhibit larger body sizes today not because they have evolved toward gigantism, but because their evolution toward a smaller size, due to climate warming since the LGM, has been decelerated by the island effect. These combined results suggest that evolution in Quaternary island small mammals may not have been as fast as expected by the island effect because of the counteracting effect of climate change during this period.Key words. Apodemus, climate change, evolutionary rates, incisor, island rule, Japan, size.Received December 15, 2003. Accepted January 27, 2004 Populations that evolve on islands often provide remarkable examples of size evolution. Among island mammals, it is frequently found that small species evolve toward a larger size and large species toward a smaller size (Foster 1964;Van Valen 1973;Lomolino 1985), and this tendency has come to be known as the island rule (Van Valen 1973). The dwarfing of large mammals on island is remarkably well illustrated by Pleistocene elephants (Sondaar 1977;Roth 1992), hippopotami (Simmons 1988), deer (Lister 1989, and sloths (Anderson and Handley 2002). Similarly, the trend toward gigantism of island rodents has been observed in numerous extant species (Hall 1938;Delany 1970;Heaney 1978;Vaughan and Schwartz 1980;Musser 1981;Lawlor 1982;Melton 1982; Davis 1983;Musser and Newcomb 1983;Angerbjö rn 1986;Collins and George 1990;Musser and Heaney 1992;Smith 1992;Libois et al. 1993;Vigne et al. 1993;Adler and Levins 1994;Adler 1996; Berry 1996;Ramalhinho et al. 1996;Olmos 1997) as well as among some fossil species (Crusafont-Pairo and Petter 1964;Freudenthal 1976Freudenthal , 1985Brandy 1978;Mein and Adrover 1982;Daams and Freudenthal 1985;Agusti 1986;Hutterer et al. 1988;Vigne 1992;Biknevicius et al. 1993;Mezzabotta et al. 1996;Michaux et al. 1996;Millien and Jaeger 2001). However, not all island rodent populations show strong body size differences from mainland populations (Foster 1964; Case 1978;Lomolino 1985). The strength of the island effect on size evolution is usually presumed to be rou...

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confidence: 86%

Climate Change and Size Evolution in an Island Rodent Species: New Perspectives on the Island Rule

2004

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“…(Mein and Adrover, 1982;Adrover et al, 1983Adrover et al, -1984. From Menorca, the deposit of Punta Nati 2 yielded remains of a Gymnesicolagus, a glirid, similar to Margaritamys llulli from the Mallorcan deposits of Santa Margalida and Sant Llorenç, and a large-sized tortoise.…”

Section: Early Insular Faunasmentioning

confidence: 99%

Three islands, three worlds: Paleogeography and evolution of the vertebrate fauna from the Balearic Islands

Bover

Quintana

Alcover

2008

Quaternary International

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“…A final possibility for the origin of Hypnomys , consistent with the upper bounds of our node age 95% HPDs, is an early split from mainland ancestors and pre‐MSC arrival to the Balearic Islands during the Langhian–Serravalian regression (Moyà‐Solà, Quintana, Alcover, & Köhler, ; Riba, ). However, the fossil record of mammals of this age from Mallorca and Menorca is restricted to the ochotonid Gymnesicolagus gelaberti Mein & Adrover, , and the glirids Carbomys sacaresi Mein & Adrover, , Margaritamys llulli Mein & Adrover, and Peridyromys ordinasi Mein & Adrover, in Mallorca (Adrover, Agustí, Moyà‐Solà, & Pons‐Moyà, ; Mein & Adrover, ), and Margaritamys adroveri Quintana & Agustí, in Menorca (Quintana & Agustí, ). All of the glirids from this faunal episode have lower dental complexity than NB‐1 glirid, making them unlikely ancestors (as for Eliomys ).…”

Section: Discussionmentioning

confidence: 99%

Ancient DNA from an extinct Mediterranean micromammal—Hypnomys morpheus(Rodentia: Gliridae)—Provides insight into the biogeographic history of insular dormice

Bover

Torres-Roig

Llamas

et al. 2019

J Zool Syst Evol Res

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The dormice (Gliridae) are a family of rodents represented by relatively few extant species, though the family was much more species-rich during the Early Miocene.Intergeneric phylogenetic relationships among glirids in some cases remain unresolved, despite extensive molecular and morphological analyses. Uncertainty is greatest with respect to the relationships among fossil taxa and how extinct lineages are related to modern species. The fossil genus Hypnomys from the Balearic Islands (western Mediterranean Sea) includes the Late Pleistocene-Holocene species Hypnomys morpheus, which has variously been considered a close relative or subgenus of the extant Eliomys. In the present study, we sequenced ancient mitochondrial DNA from H. morpheus, which suggests a sister relationship with the extant members of Eliomys.In addition, the pairwise sequence variation between Hypnomys and Eliomys is higher than that observed between congeneric glirid species (e.g., many Graphiurus spp.), which allows us to reject the hypothesis that Hypnomys is a subgenus of Eliomys. Our molecular dating analyses suggest that Hypnomys and Eliomys diverged 13.67 million years ago (95% highest posterior density [HPD] = 7.39-20.07). The relatively early split between these genera together with the molar morphology of early representatives of Hypnomys points to a Middle-Late Miocene origin from a continental glirid with a complex molar pattern, such as Vasseuromys or a closely related genus. K E Y W O R D Sendemic, fossil, Island fauna, mitochondrial DNA, phylogeny

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Une faunule de mammifères insulaires dans le miocène moyen de majorque (iles baléares)

Cited by 32 publications

References 4 publications

Climate Change and Size Evolution in an Island Rodent Species: New Perspectives on the Island Rule

Climate Change and Size Evolution in an Island Rodent Species: New Perspectives on the Island Rule

Three islands, three worlds: Paleogeography and evolution of the vertebrate fauna from the Balearic Islands

Ancient DNA from an extinct Mediterranean micromammal—Hypnomys morpheus(Rodentia: Gliridae)—Provides insight into the biogeographic history of insular dormice

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