Ancient marine isoscapes and isotopic evidence of bulk-feeding by Oligocene cetaceans

Clementz, Mark T.; Fordyce, R. Ewan; Peek, Stephanie; Fox, David L.

doi:10.1016/j.palaeo.2012.09.009

Cited by 59 publications

(43 citation statements)

References 76 publications

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“…This conclusion is consistent with the isotopic values reported by Clementz et al (2014), which indicate that M. hakataramea fed higher in the food chain than typical filter feeding mysticetes. We agree with Fitzgerald (2010) that the extensive wear in Mammalodon is more easily reconciled with suction feeding than with raptorial feeding, which depends on functional teeth for grasping and/or processing large prey; nevertheless, facultative durophagy or raptorial sarcophagy cannot be ruled out.…”

Section: Discussionsupporting

confidence: 92%

“…Together, these three species form an expanded Mammalodontidae, which in turn are closely related to a diverse range of aetiocetids described only from the North Pacific. OU 22026 was also sampled for isotopes by Clementz et al (2014), who reported δ 13 C and δ 18 O values for structural bone carbonate from the bulla that are inconsistent with (filter-)feeding low in the food chain.…”

Section: Introductionmentioning

confidence: 99%

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Mysticetes baring their teeth: a new fossil whale, Mammalodon hakataramea, from the Southwest Pacific

Fordyce¹,

Marx²

2016

MMV

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A small, toothed fossil cetacean from Hakataramea Valley (South Canterbury, New Zealand) represents a new Late Oligocene species, Mammalodon hakataramea. The new material is from the Kokoamu Greensand (Duntroonian Stage, about 27 Ma, early to middle Chattian) of the Canterbury Basin, and thus about 2 Ma older than the only other species included in this genus, Mammalodon colliveri (Late Oligocene, Victoria, Australia). The anterior pedicle of the tympanic bulla is not fused to the periotic and resembles that of Delphinidae in basic structure. The teeth show extreme attritional and/or abrasive wear, which has obliterated the crowns. Like Mammalodon colliveri, M. hakataramea was probably raptorial or a benthic suction feeder.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Mysticetes baring their teeth: a new fossil whale, Mammalodon hakataramea, from the Southwest Pacific

Fordyce¹,

Marx²

2016

MMV

Self Cite

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“…This might include an investigation of dietary stable isotopes, to determine at what trophic level aetiocetids were feeding (e.g. Clementz et al, 2014); an increased focus on the oldest (Late Eocene-Early Oligocene) mysticetes, to test for evidence of suction feeding in early chaeomysticetes (e.g. tooth wear), or further evidence regarding baleen in aetiocetids, e.g.…”

Section: An Alternative Model Of Baleen Evolutionmentioning

confidence: 99%

Suction feeding preceded filtering in baleen whale evolution

Marx

Hocking²,

Park³

et al. 2016

MMV

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Marx F.G., Hocking D.P., Park T., Ziegler T., Evans A.R. and Fitzgerald, E.M.G. 2016. Suction feeding preceded filtering in baleen whale evolution. Memoirs of Museum Victoria 75: 71-82.The origin of baleen, the key adaptation of modern whales (Mysticeti), marks a profound yet poorly understood transition in vertebrate evolution, triggering the rise of the largest animals on Earth. Baleen is thought to have appeared in archaic tooth-bearing mysticetes during a transitional phase that combined raptorial feeding with incipient bulk filtering. Here we show that tooth wear in a new Late Oligocene mysticete belonging to the putatively transitional family Aetiocetidae is inconsistent with the presence of baleen, and instead indicative of suction feeding. Our findings suggest that baleen arose much closer to the origin of toothless mysticete whales than previously thought. In addition, they suggest an entirely new evolutionary scenario in which the transition from raptorial to baleen-assisted filter feeding was mediated by suction, thereby avoiding the problem of functional interference between teeth and the baleen rack.

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“…Data suggest that Tlaxcallicetus was contemporaneous with the latter Oligocene mysticetes but limited by regions, as well as sympatric in the Northwest of Mexico with other late Oligocene cetaceans, including aetiocetids, eomysticetids, archaic odontocetes, and kekenodontid-like animals (Barnes, 1998;Hernandez-Cisneros and Tsai, 2016;Hernández-Cisneros et al, 2017). Thus, it can be considered as a part of the multiple relict forms of filter-feeders mysticetes that were common during late Oligocene , which derived from different factors such as evolutionary development (Fordyce and de Muizon, 2001;Fitzgerald, 2010;Tsai and Fordyce, 2014a, 2014b, sympatric speciation events (Clementz et al, 2014), and niche partition (Tsai and Ando, 2015) into heterogeneous environment with varied food sources (Fordyce, 2003;Steeman et al, 2009;Marx and Uhen, 2010). This framework fits the Oligocene mysticetes diversity recorded in Baja California Sur.…”

Section: Discussionmentioning

confidence: 99%

A new group of late Oligocene mysticetes from México

Cisneros¹

2018

Palaeontol Electron

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Ancient marine isoscapes and isotopic evidence of bulk-feeding by Oligocene cetaceans

Cited by 59 publications

References 76 publications

Mysticetes baring their teeth: a new fossil whale, Mammalodon hakataramea, from the Southwest Pacific

Mysticetes baring their teeth: a new fossil whale, Mammalodon hakataramea, from the Southwest Pacific

Suction feeding preceded filtering in baleen whale evolution

A new group of late Oligocene mysticetes from México

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