The Pliensbachian ammonite Dayiceras dayiceroides and Early Jurassic paleogeography

Uptonia? dayiceroides Mouterde is placed in the genus Dayiceras and its age established as latest Jamesoni Zone to possibly earliest Domerian. The species is abundant and associated with faunas of Tethyan aspect along the northeastern Pacific margin. First occurrences in Oregon and Nevada and new occurrences in British Columbia are reported. Localities at apparently high paleolatitudes are attributed to post-early Pliensbachian transcurrent fault displacements. Genetic continuity with a disjunct population in Portugal is postulated via a central Atlantic seaway, here named the Hispanic Corridor, connecting the eastern Pacific and western Tethys Oceans. The existence of this corridor during the Pliensbachian is supported by several lines of independent paleobiogeographic evidence.

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Three new species of the Hettangian (Early Jurassic) ammoniteSunrisitesfrom British Columbia, Canada

Journal of Paleontology ◽

10.1666/05-158.1 ◽

2008 ◽

Vol 82 (1) ◽

pp. 128-139 ◽

Cited By ~ 7

Author(s):

L. M. Longridge ◽

P. L. Smith ◽

J. Pálfy ◽

H. W. Tipper

Keyword(s):

British Columbia ◽

New Species ◽

Sexual Dimorphism ◽

North America ◽

Eastern Pacific ◽

Northeastern Pacific ◽

Large Shell ◽

Three New Species ◽

First Time ◽

Stratigraphic Range

Most species of the middle and late Hettangian psiloceratid genusSunrisitesare endemic to the eastern Pacific, where they are common members of ammonoid assemblages. the Taseko Lakes map area in British Columbia yields diverse and well-preservedSunrisitesfaunas which are formally described here for the first time. Three new species are recognized,S. brimblecombei, S. chilcotinensis, andS. senililevis.the new species require an extension of the morphological range of the genus to include forms that become moderately involute at large shell diameters. Signs of sexual dimorphism are apparent within all three new species ofSunrisites.This work extends the stratigraphic range ofSunrisitesto include the latest Hettangian Rursicostatum Zone in North America. The distribution ofSunrisitessuggests that the Hispanic Corridor, which linked the western Tethyan Ocean and the eastern Pacific, may have been open during the Hettangian. Furthermore, occurrences of the genus constrain the Hettangian position of several allochthonous terranes to the northeastern Pacific.

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A new fossil frog crab (Brachyura, Raninoidea) from the Paleogene of northeastern Pacific

Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen ◽

10.1127/njgpa/2020/0936 ◽

2020 ◽

Vol 298 (1) ◽

pp. 87-101

Author(s):

Torrey Nyborg ◽

Giovanni Pasini ◽

Alessandro Garassino ◽

Barry W.M. van Bakel ◽

Francisco J. Vega ◽

...

Keyword(s):

British Columbia ◽

New Species ◽

New Genus ◽

Washington State ◽

Eastern Pacific ◽

The North ◽

North Eastern ◽

Two New Species ◽

Northeastern Pacific ◽

Upper Paleogene

One new genus and two new species of fossil frog crabs from the Eocene to Oligocene deposits of Washington State (USA) and Vancouver Island (British Columbia, Canada) of the north-eastern Pacific are described, based upon several well- preserved specimens. The studied specimens are herein described as Amphoranina blandi n. gen., n. sp. and A. multispinata n. gen, n. sp. (Raninidae De Haan, 1839) respectively. Amphoranina n. gen. appears to be endemic to the middle to upper Paleogene of the northeastern Pacific.

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Ups and downs of belemnite diversity in the Early Jurassic of Western Tethys

Palaeontology ◽

10.1111/pala.12522 ◽

2021 ◽

Author(s):

Pascal Neige ◽

Robert Weis ◽

Emmanuel Fara

Keyword(s):

Early Jurassic ◽

Western Tethys

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Orbiniella nuda new species (Orbiniidae) and nine new records of other sedentariate polychaetous annelids from Washington and British Columbia

Canadian Journal of Zoology ◽

10.1139/z74-011 ◽

1974 ◽

Vol 52 (1) ◽

pp. 69-75 ◽

Cited By ~ 3

Author(s):

Katharine D. Hobson

Keyword(s):

British Columbia ◽

New Species ◽

Pacific Ocean ◽

New Records ◽

Descriptive Information ◽

Northeastern Pacific

Orbiniella nuda, new species, is newly described from Washington. Naineris quadricuspida, Pygospio elegans, Pherusa negligens, Asclerocheilus beringianus, Euzonus williamsi, Barantolla americana, Decamastus gracilis, Mediomastus capensis, and Stygocapitella subterranea are newly recorded from Washington or from Washington and British Columbia. Most of these species have not previously been reported from the cold temperate northeastern Pacific Ocean. In addition, new descriptive information is provided for some species.

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Early Jurassic (Pliensbachian) brachiopod biogeography in the western Tethys: The Euro-Boreal and Mediterranean faunal provinces revised

Palaeogeography Palaeoclimatology Palaeoecology ◽

10.1016/j.palaeo.2016.06.016 ◽

2016 ◽

Vol 457 ◽

pp. 170-185 ◽

Cited By ~ 8

Author(s):

Attila Vörös

Keyword(s):

Early Jurassic ◽

Western Tethys

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Organic petrology and geochemistry of organic-rich rocks of the Late Triassic and Early Jurassic Sandilands and Ghost Creek Formations, Queen Charlotte Islands, British Columbia

Marine and Petroleum Geology ◽

10.1016/0264-8172(95)90388-z ◽

1995 ◽

Vol 12 (1) ◽

pp. 70-81 ◽

Cited By ~ 3

Author(s):

R.M. Bustin ◽

M. Mastalerz

Keyword(s):

British Columbia ◽

Early Jurassic ◽

Late Triassic ◽

Organic Petrology ◽

Queen Charlotte Islands ◽

Petrology And Geochemistry

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Revising geographic distributions of eastern Pacific moray eels

Bulletin of Marine Science ◽

10.5343/bms.2020.0060 ◽

2021 ◽

Author(s):

Katherine E Dale ◽

Arturo Ramírez-Valdez ◽

John E McCosker ◽

Milton S Love

Keyword(s):

Local Ecological Knowledge ◽

Species Distributions ◽

Geographic Range ◽

Range Size ◽

Eastern Pacific ◽

Ecological Knowledge ◽

Geographic Range Size ◽

Biogeographic Provinces ◽

Established Population ◽

New Occurrences

Under the influence of climate stressors, species distributions of fishes in the eastern Pacific are shifting, with many species moving poleward. Moray eels (family Muraenidae) are ecologically important predators inhabiting coastal reefs. Due to their cryptic nature and lack of commercial importance, the species distributions of muraenids in the tropical and subtropical eastern Pacific are poorly understood. Here, we document the geographic range size of 33 muraenid species in the eastern Pacific and also report a shift in the established population range of Muraena argus based on recent trapping efforts. We found that 17 species demonstrated shifts in geographic range size, including sampled-range expansions and new occurrences at offshore islands. Eleven species were observed in new biogeographic provinces, primarily in the northward direction to the San Diegan province. Trapping data and local knowledge gathered from fishing cooperatives suggest that M. argus has established populations at least 300 km further north than previously reported. Both the yearly number of reported observations and geographic extent of sampling have increased over time, but the number of recorded extensions has not. These results highlight the importance of compiling data from diverse sources (including museum records, local ecological knowledge, and the non-English scientific literature) as well as the continued value of biodiversity surveys in the eastern Pacific.

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Two new species of stalked crinoids from the northeastern Pacific in the genera Gephyrocrinus and Ptilocrinus (Echinodermata, Crinoidea, Hyocrinidae). Effects of ontogeny and variability on hyocrinid taxonomy

Zootaxa ◽

10.11646/zootaxa.2825.1.1 ◽

2011 ◽

Vol 2825 (1) ◽

pp. 1 ◽

Cited By ~ 3

Author(s):

MICHEL ROUX ◽

PHILIP LAMBERT

Keyword(s):

British Columbia ◽

New Species ◽

Single Species ◽

Depth Range ◽

Evolutionary Trend ◽

Exceptional Collection ◽

The Family ◽

Two New Species ◽

Northeastern Pacific ◽

Stalked Crinoids

Two new species of deep-sea stalked crinoids belonging to the family Hyocrinidae were collected in the northeastern Pacific. The descriptions contain detailed information on character variations and ontogeny. The five specimens of Gephyrocrinus messingi n. sp. lived at depths ranging from 1,777 m to 2,110 m off British Columbia and California. This new species is the first record of the genus Gephyrocrinus in the Pacific Ocean, which was previously known from only a single species, G. grimaldii, from the northeastern Atlantic at the same depth range. The two species illustrate opposing phenotypes within the same genus. Fifty-eight specimens of the second new species, Ptilocrinus clarki n. sp., were dredged off British Columbia close to the type-locality of P. pinnatus, the type species of the genus Ptilocrinus, but at shallower depths ranging from 1,178 to 1,986 m. This exceptional collection provides significant data on intraspecific variation in the main morphological characters, especially arm pattern. The ontogeny of stalk articulations and the main traits of adoral plate differentiation are described in detail. A complementary investigation on P. pinnatus was conducted using specimens collected by the “Albatross” expedition at a depth of 2,906 m. Despite similarities in external morphology, tegmen and cover plates, the two ptilocrinid species display significant differences in pinnule architecture, aboral cup and stalk articulations. From comparison with Gephyrocrinus messingi n. sp. and Ptilocrinus clarki n. sp., G. grimaldii and P. pinnatus are interpreted as the result of heterochronic development by paedomorphy after ecological or geographic isolation. Pinnule architecture in the two new species suggests first steps in an evolutionary trend toward a rigid box which protects gonad inflation in the proximal part of the pinnule. These new data on Ptilocrinus and Gephyrocrinus create problems in the current taxonomy of the family Hyocrinidae. The main derived characters, especially in pinnule and arm pattern, are used to propose new hypotheses for hyocrinid phylogeny.

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