Columbia-North Pacific Region Comprehensive Framework Study of Water and Related Lands. Appendix I. History of Study

1971 ◽  
Author(s):  
E. L. White ◽  
G. J. Gronewald ◽  
H. H. Ralphs ◽  
G. E. Van Santen
Keyword(s):  
North Pacific ◽  
Pacific Region ◽  
History Of ◽  
North Pacific Region ◽  
Comprehensive Framework ◽  
History Of Study

scholarly journals Oldest record of monk seals from the North Pacific and biogeographic implications

2019 ◽  
Vol 15 (5) ◽  
pp. 20190108 ◽  
Author(s):  
Jorge Velez-Juarbe ◽  
Ana M. Valenzuela-Toro
Keyword(s):  
North Pacific ◽  
Fossil Record ◽  
Marine Mammals ◽  
Pacific Region ◽  
The North ◽  
Biogeographic History ◽  
History Of ◽  
North Pacific Region ◽  
Monk Seals ◽  
The North Pacific

True seals (crown Phocidae) originated during the late Oligocene–early Miocene (approx. 27–20 Ma) in the North Atlantic/Mediterranean region, with later (middle Miocene, approx. 16–11 Ma) dispersal events to the South Atlantic and South Pacific. Contrasting with other pinnipeds, the fossil record of phocids from the North Pacific region is scarce and restricted to the Pleistocene. Here we present the oldest fossil record of crown phocids, monachines (monk seals), from the North Pacific region. The specimens were collected from the upper Monterey Formation in Southern California and are dated to 8.5–7.1 Ma, predating the previously oldest known record by at least 7 Ma. This record provides new insights into the early biogeographic history of phocids in the North Pacific and is consistent with a northward dispersal of monk seals (monachines), which has been recognized for other groups of marine mammals. Alternatively, this finding may correspond with a westward dispersal through the Central American Seaway of some ancestor of the Hawaiian monk seal. This record increases the taxonomic richness of the Monterey pinniped assemblage to five taxa, making it a fairly diverse fossil assemblage, but also constitutes the oldest record of sympatry among all three extant pinniped crown clades.

Possibility of recent changes in vertical distribution and size composition of chlorophyll-a in the western North Pacific region

2009 ◽  
Vol 65 (2) ◽  
pp. 179-186 ◽  
Author(s):  
Hiroshi Ishida ◽  
Yutaka W. Watanabe ◽  
Joji Ishizaka ◽  
Toshiya Nakano ◽  
Naoki Nagai ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Chlorophyll A ◽  
North Pacific ◽  
Western North Pacific ◽  
Size Composition ◽  
Pacific Region ◽  
North Pacific Region

The Last Surviving Ammonoid at the end of the Cretaceous in the North Pacific Region

2016 ◽  
Vol 20 (2) ◽  
pp. 116-120 ◽  
Author(s):  
Ken'ichi Kurihara ◽  
Manabu Kano ◽  
Hiroshi Sawamura ◽  
Yoshio Sato
Keyword(s):  
North Pacific ◽  
Pacific Region ◽  
The North ◽  
North Pacific Region ◽  
The North Pacific

New Nanaimo Group ammonites (Cretaceous, Santonian–Campanian) from British Columbia and Washington State

1989 ◽  
Vol 63 (2) ◽  
pp. 218-227 ◽  
Author(s):  
James W. Haggart ◽  
Peter D. Ward
Keyword(s):  
United States ◽  
British Columbia ◽  
North Pacific ◽  
Washington State ◽  
Western Canada ◽  
Pacific Region ◽  
The North ◽  
North Pacific Region ◽  
The North Pacific

The ammonite species Puzosia (Mesopuzosia) densicostata Matsumoto, Kitchinites (Neopuzosia) japonicus Spath, Anapachydiscus cf. A. nelchinensis Jones, Menuites cf. M. menu (Forbes), Submortoniceras chicoense (Trask), and Baculites cf. B. boulei Collignon are described from Santonian–Campanian strata of western Canada and northwestern United States. Stratigraphic occurrences and ranges of the species are summarized and those taxa important for correlation with other areas in the north Pacific region are noted.

REVIEW OF THE TREMATODE GENERA BACCIGER AND PENTAGRAMMA (FELLODISTOMATIDAE) AND DESCRIPTION OF P. PETROWI (LAYMAN, 1930) N. COMB. FROM MARINE FISHES FROM THE PACIFIC COAST OF CANADA

1965 ◽  
Vol 43 (2) ◽  
pp. 381-405 ◽  
Author(s):  
L. Margolis ◽  
Hilda Lei Ching
Keyword(s):  
North Pacific ◽  
Pacific Coast ◽  
Marine Fishes ◽  
Pacific Region ◽  
British Isles ◽  
Type B ◽  
The North ◽  
The Pacific ◽  
North Pacific Region ◽  
The North Pacific

The generic diagnoses of Bacciger and Pentagramma are emended. Recognized as members of the genus Bacciger are the type, B. bacciger (Rudolphi, 1819), from the Mediterranean, Black, and Azov Seas; B. nicolli Palombi, 1934, from Atlantic waters near the British Isles; and B. opisthonemae Nahhas and Cable, 1964, from Jamaican waters. Pentagramma consist of P. symmetricum Chnlkova, 1939, the type, from the Black and Azov Seas and P. petrowi (Layman, 1930) n. comb, from the northern part of the North Pacific region. Synonyms of P. petrowi are Monorcheides(?) petrowi Layman, 1930: Orientophorus sayori Yamaguti, 1942; Faustula sayori (Yamaguti, 1942); Orientophorus petrowi (Layman, 1930); and Bacciger petrowi (Layman, 1930). Pentagramma petrowi is redescribed and additional details of morphology are included for P. symmetricum, B. bacciger, and B. nicolli. Measurements of the species discussed and extensive host and locality records are tabulated.

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