Paleoecological relationships of the Late Cretaceous lamniform shark, <i>Cretoxyrhina mantelli</i> (Agassiz)

Shimada, Kenshu

doi:10.1017/s002233600003585x

Cited by 70 publications

(81 citation statements)

References 6 publications

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“…Whereas the dentition changed already strongly in the Cretaceous (e.g., (cf. [11][12][13][14][15]), and herein continuing in the Tertiary), it can be demonstrated, that the squamation and vertebrae retained with plesiomorph characters. Those are found similar at modern Isurus (cf.…”

Section: Introductionmentioning

confidence: 91%

“…Turbidites within the slope facies preserved disarticulated shark remains but rarely complete skeletons. The best preservation cases are found in the Paleontology Journal [18]; KUVP no. 247 after [19]); (c) articulated skeleton from the Niobrara Formation (Coniancian to Campanian) of USA (redrawn after [13]; FHSM no.…”

Section: Turonianmentioning

confidence: 99%

“…The skull is preserved with cartilage and hundreds of teeth in nearly anatomical position. Interestingly, the stomach contents are preserved; they consist of fragments of a five-meter long giant bony fish Xiphactinus audax (Figure 3(b), after [18]). Another roughly five-meter long skeleton (Figure 3(c), FHSM VP-2187, after [18]) is the most complete skeleton ever known.…”

Section: Turonianmentioning

confidence: 99%

“…Its vertebrae and teeth are well described but not the denticles (cf. [18]). Dermal denticles were mentioned at least [13] but not figured.…”

Section: Turonianmentioning

confidence: 99%

“…Wellnhofer). Shimada [6,[10][11][12][13][14][15]29] and Shimada et al [14] published very well-preserved, nearly complete and new skeletons of "Cretoxyrhina mantelli" from the Niobrara Formation, Kansas (North America). Other specimens (a complete skeleton plus another partial one)…”

Section: Global Skeletonmentioning

confidence: 99%

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Skeleton of the Fossil SharkIsurus denticulatusfrom the Turonian (Late Cretaceous) of Germany—Ecological Coevolution with Prey of Mackerel Sharks

Diedrich¹

2014

Paleontology Journal

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AnIsurus denticulatus(Glickman, 1957) shark skeleton from the late Turonian (Late Cretaceous) of Germany is described within a diverse upwelling influenced fish fauna of northern Germany, Europe. It was found in the turbiditic marly limestones at the submarine Northwestphalian Lippe Swell in the southern Proto-North Sea Basin. Compared to modern mackerel sharkIsurus oxyrinchusRafinesque, 1809, including cranial denticles, this allows a revision of the younger synonym “CretoxyrhinaGlickman, 1964”. Within the CretaceousIsurus, a loss of the lateral tooth cusps and nutritive clefts of the roots (considered as plesiomorphic character of the Lamnidae) took place from the Albian (Early Cretaceous) to the Campanian (Late Cretaceous). The tooth morphology changed during the Albian-Turonian from a tearing (I. denticulatus) to a cutting (I. mantelli) type (Coniacian-Campanian). The complete lateral cusplet and symphyseal teeth reduction inIsurusat the end of the Cretaceous seem to be a result of the coevolutionary changing feeding habits of a worldwide expanding shark. In a second evolutionary adaptation, parallel to the new radiation of marine mammals (Paleocene/early Eocene), fromIsurus, the white shark ancestors (Carcharodon) seem to originate. In another radiation fromIsurus, coevolving with appearance of dolphins and further marine mammal evolution within the Middle Miocene, a second timeIsurusdeveloped serrated teeth (I. escheri).

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Section: Introductionmentioning

confidence: 91%

Section: Turonianmentioning

confidence: 99%

Section: Turonianmentioning

confidence: 99%

“…Its vertebrae and teeth are well described but not the denticles (cf. [18]). Dermal denticles were mentioned at least [13] but not figured.…”

Section: Turonianmentioning

confidence: 99%

Section: Global Skeletonmentioning

confidence: 99%

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Skeleton of the Fossil SharkIsurus denticulatusfrom the Turonian (Late Cretaceous) of Germany—Ecological Coevolution with Prey of Mackerel Sharks

Diedrich¹

2014

Paleontology Journal

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Dental homologies in lamniform sharks (Chondrichthyes: Elasmobranchii)

Shimada

2001

Journal of Morphology

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121

170

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The dentitions of lamniform sharks are said to exhibit a unique heterodonty called the "lamnoid tooth pattern." The presence of an inflated hollow "dental bulla" on each jaw cartilage allows the recognition of homologous teeth across most modern macrophagous lamniforms based on topographic correspondence through the "similarity test." In most macrophagous lamniforms, three tooth rows are supported by the upper dental bulla: two rows of large anterior teeth followed by a row of small intermediate teeth. The lower tooth row occluding between the two rows of upper anterior teeth is the first lower anterior tooth row. Like the first and second lower anterior tooth rows, the third lower tooth row is supported by the dental bulla and may be called the first lower intermediate tooth row. The lower intermediate tooth row occludes between the first and second upper lateral tooth rows situated distal to the upper dental bulla, and the rest of the upper and lower tooth rows, all called lateral tooth rows, occlude alternately. Tooth symmetry cannot be used to identify their dental homology. The presence of dental bullae can be regarded as a synapomorphy of Lamniformes and this character is more definable than the "lamnoid tooth pattern." The formation of the tooth pattern appears to be related to the evolution of dental bullae. This study constitutes the first demonstration of supraspecific tooth-to-tooth dental homologies in nonmammalian vertebrates.

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Skeletal anatomy of the Late Cretaceous shark,Squalicorax (Neoselachii: Anacoracidae)

Shimada

Cicimurri

2005

Paläontol. Z.

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Paleoecological relationships of the Late Cretaceous lamniform shark, Cretoxyrhina mantelli (Agassiz)

Cited by 70 publications

References 6 publications

Skeleton of the Fossil SharkIsurus denticulatusfrom the Turonian (Late Cretaceous) of Germany—Ecological Coevolution with Prey of Mackerel Sharks

Skeleton of the Fossil SharkIsurus denticulatusfrom the Turonian (Late Cretaceous) of Germany—Ecological Coevolution with Prey of Mackerel Sharks

Dental homologies in lamniform sharks (Chondrichthyes: Elasmobranchii)

Skeletal anatomy of the Late Cretaceous shark,Squalicorax (Neoselachii: Anacoracidae)

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