Miocene Basking Sharks (Lamniformes: Cetorhinidae) from the Chesapeake Group of Maryland and Virginia

Gottfried, Michael D.

doi:10.1080/02724634.1995.10011240

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…Fossil remains assignable to Cetorhinus have been recovered from the Eocene of North America; the Oligocene of Netherlands, Germany, Belgium, Roumania, and France; the Miocene of France, Austria, Switzerland, Japan, and United States; the Pliocene of Belgium, Italy, and Chile; and thePleistocene of Japan (Herman 1975,1979, Cappetta 1987, Bellwood 8~ Schultz 1991, Bault 1993, GCnault 1993, Long 1993, Yabumoto & Uyeno 1994, Gottfried 1995.…”

Section: Discussionmentioning

confidence: 99%

A middle Eocene basking shark (Lamniformes, Cetorhinidae) from Antarctica.

Cione¹,

Reguero²

1998

Antartic science

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Abstract:A proximal fragment of a gill raker identified as belonging to a shark of the genus Cetorhinus was collected from middle Eocene deposits of the La Meseta Formation in the northern part of Seymour Island, Antarctica. This is the first record of a fossil basking shark from Antarctica and one of the earliest records of the genus. The minimum age of Cetorhinidae is middle Eocene. The only living species of the family Cetorhinidae is a very large plankton feeder, Cetorhinus maximus. Basking sharks are unknown in subantarctic or Antarctic waters but occur on both South American coasts today. The evolution of filterfeeding vertebrates is discussed.

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Section: Discussionmentioning

confidence: 99%

A middle Eocene basking shark (Lamniformes, Cetorhinidae) from Antarctica.

Cione¹,

Reguero²

1998

Antartic science

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“…Early to middle Miocene basking sharks are quite diverse, largely unstudied, and usually referred to Cetorhinus sp. (Applegate in Mitchell and Tedford, 1973;Domning, 1978;Karasawa, 1989;Yabumoto and Uyeno, 1994;Bolliger et al, 1995;Gottfried, 1995;Purdy et al, 2001;Gonzalez-Barba and Thies, 2000) or are variously assigned to C. maximus Karasawa, 1989;Uyeno et al, 1983;Yabumoto and Uyeno, 1994;Long, 1994). Jordan and Hannibal (1923, p. 31, pl.…”

Section: Introductionmentioning

confidence: 99%

Cetorhinuscf.C. maximus(Gunnerus) (Lamniformes: Cetorhinidae), A Basking Shark from the Late Miocene Empire Formation, Coos Bay, Oregon

Welton¹

2013

Bulletin, Southern California Academy of Sciences

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The family Cetorhinidae Gill includes one extant genus, Cetorhinus Blainville, and a single living species, the basking shark, C. maximus (Gunnerus). Basking sharks are coastal pelagic to oceanic with circumglobal distribution in boreal to warm-temperate waters of the continental and insular shelves. Second only in size to the whale shark, Rhincodon typus, basking sharks attain a maximum total length of 12 to 15 m (although generally not exceeding 9.8 m), and are planktivorous, feeding by filtering copepods, barnacles, decapod larvae and fish eggs from the water. The first Tertiary records of undisputed cetorhinids are from the middle Eocene of Antarctica, possibly the middle Eocene of Russia, and the late Eocene of Oregon. Eocene cetorhinids are referred to Keasius taylori, and Oligocene through early Miocene basking sharks are traditionally assigned to Keasius parvus. The earliest occurrence of Cetorhinus in the northeastern Pacific is early Miocene, and fossils attributed to this genus are relatively common in middle Miocene through Pleistocene marine sediments of Oregon, California, and Baja California, Mexico. Late Miocene and younger Cetorhinus are conventionally placed in the extant species, C. maximus. Late Miocene fossils of a basking shark from the Coos Conglomerate Member of the Empire Formation, Oregon, were collected in 1972 by students from the University of California, Berkeley. Associated vertebrae and gill rakers compare favorably in size and overall morphology with those of adult Recent C. maximus. Based on correlations of vertebral and gill raker dimensions with the total length for Recent C. maximus, the Empire basking shark is estimated to have been between 4.5 and 5.75+ m in total length. Although gill rakers and vertebrae from the Empire Formation compare favorably with those of C. maximus, a definitive identification requires dentition. The occurrence of Cetorhinus cf. C. maximus in the late Miocene of Oregon is consistent with other late Miocene records of this species in California and Chile. C. maximus may range no earlier than late Miocene in the eastern North Pacific.

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1996

Great White Sharks

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Miocene Basking Sharks (Lamniformes: Cetorhinidae) from the Chesapeake Group of Maryland and Virginia

Cited by 6 publications

References 2 publications

A middle Eocene basking shark (Lamniformes, Cetorhinidae) from Antarctica.

A middle Eocene basking shark (Lamniformes, Cetorhinidae) from Antarctica.

Cetorhinuscf.C. maximus(Gunnerus) (Lamniformes: Cetorhinidae), A Basking Shark from the Late Miocene Empire Formation, Coos Bay, Oregon

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