Fossils of large terrestrial arthropods from the Lower Devonian of Canada

Shear, William A.; Gensel, Patricia G.; Jeram, Andrew J.

doi:10.1038/384555a0

Cited by 63 publications

(53 citation statements)

References 14 publications

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“…The Lower Devonian (late Emsian) Campbellton Formation is a sequence of terrestrial conglomerate, sandstone, and mudstone rich in plant and fish fossils. It unconformably overlies volcanic rocks of the Dalhousie Group along the Bay of Chaleur (Dineley and Williams 1968;Andrews et al 1974Andrews et al , 1975Gensel 1982;Trant and Gensel 1985;Richardson and McGregor 1986;Gensel et al 1991;Johnson and Gensel 1992;Miller 1996;Shear et al 1996;Miller et al 2003;Wilson et al 2005;Burrow et al 2008;Turner and Miller 2008;Gerrienne et al 2011).…”

Section: Northwest Of the Rocky Brook-millstream Faultmentioning

confidence: 99%

A Review of Proterozoic to Early Paleozoic Lithotectonic Terranes in New Brunswick, Canada and their Tectonic Evolution during Penobscot, Taconic, Salinic and Acadian Orogenesis

Fyffe

Johnson²,

Staal

2012

atgeol

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Geological relationships preserved in the New Brunswick segment of the Appalachian orogen are key to deciphering the complex tectonic events that occurred during the closing of the Paleozoic Iapetus Ocean. These events can be explained in terms of geodynamic interactions between eight lithotectonic terranes. The first, the Caledonia terrane, comprises Neoproterozoic volcanic arc sequences and comagmatic plutons considered to form part of the microcontinent of Avalonia. The seven other terranes are associated with the microcontinent of Ganderia and consist of (1) Brookville terrane-Mesoproterozoic to Neoproterozoic platformal carbonates and Neoproterozoic to Early Cambrian plutonic rocks, (2) New River terrane-Neoproterozoic volcanic arc sequences and comagmatic plutons overlain by a Cambrian Penobscot volcanic arc sequence, In New Brunswick, closure of the Iapetus Ocean is attributed to four major tectonic episodes: (1) the Penobscot orogeny, which accreted the Miramichi, Annidale, and St. Croix terranes to the New River terrane on the trailing edge of Ganderia by closing a Penobscot backarc basin in the Early Ordovician, (2) the Taconic orogeny, which accreted the Popelogan terrane on the leading edge of Ganderia to the Laurentian margin in the Late Ordovician and effectively closed the main tract of the Iapetus Ocean, (3) the Salinic orogeny, which accreted the Elmtree and Miramichi terranes to the Laurentian margin by closing the Tetagouche backarc basin in the Silurian, and (4) the Acadian orogeny, which accreted the Caledonia terrane (Avalonia) to the Brookville and New River terranes on the trailing edge of Ganderia in the latest Silurian to earliest Devonian and in the process closed the last remaining oceanic tract in the northeastern Appalachians. RÉSUMÉLes corrélations géologiques préservées dans la partie du Nouveau-Brunswick de l'orogène des Appalaches sont essentielles pour bien comprendre le déroulement des événements tectoniques complexes survenus au moment de la fermeture de l'océan Iapetus, pendant le Paléozoïque. Il est possible d'expliquer ces événements par des interactions géodynamiques entre huit terranes lithotectoniques. Le premier, soit le terrane calédonien, comprend des séquences d'arc volcanique et des plutons comagmatiques du Néoprotérozoïque dont on estime qu'ils faisaient partie du microcontinent Avalonia. Les sept autres terranes sont associés au microcontinent Ganderia et comprenaient les terranes que voici : (1)

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Section: Northwest Of the Rocky Brook-millstream Faultmentioning

confidence: 99%

A Review of Proterozoic to Early Paleozoic Lithotectonic Terranes in New Brunswick, Canada and their Tectonic Evolution during Penobscot, Taconic, Salinic and Acadian Orogenesis

Fyffe

Johnson²,

Staal

2012

atgeol

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“…They are currently restricted to the famous Rhynie chert locality in Scotland (Hirst 1923;Hirst and Maulik 1926;Shear et al 1987), to various localities in the Rhenish Slate Mountains of Germany (Størmer 1970;Brauckmann 1987Brauckmann , 1994Schultka 1991;Dunlop and Poschmann 1997), of which Alken an der Mosel is the most famous, and to New Brunswick in Canada (Shear et al 1996). A number of additional localities have yielded early Devonian scorpions, although at least some of these taxa may have been aquatic (Selden and Jeram 1989).…”

mentioning

confidence: 99%

“…A number of additional localities have yielded early Devonian scorpions, although at least some of these taxa may have been aquatic (Selden and Jeram 1989). Spiders, mites, and pseudoscorpions have been discovered at these early to mid-Devonian localities (Shear and Kukalová-Peck 1990;Selden et al 1991) and there are further unpublished records of harvestmen (Opiliones) (Dunlop et al 2003) and the extinct order Phalangiotarbida (Poschmann et al in prep.). There is also an enigmatic early Devonian arachnid of uncertain affinities (Dunlop and Poschmann 1997).…”

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confidence: 99%

“…Trigonotarbids are spider-like arachnids, which lack the spider autapomorphies of opisthosomal silk glands and cheliceral venom glands, and which have usually been placed at the base of the so-called Tetrapulmonata group (Trigonotarbida (Araneae (Amblypygi (Uropygi, Schizomida)))) with which they share a number of synapomorphies such as two pairs of book-lungs in the ground pattern and details of the mouthparts (Shear et al 1987;Selden et al 1991). The most recent cladistic analysis resolved Trigonotarbida as sister group of the rare, Carboniferous-Recent arachnid order Ricinulei (Giribet et al 2002, fig.…”

mentioning

confidence: 99%

“…28) or complete fusion with a median sulcus, whereas trigonotarbids typically express nine dorsal tergites in which tergites 2 and 3 are commonly fused into a single macrotergite. Petrunkevitch's (1949) division of the old order Anthracomarti into two separate and unrelated orders (Anthracomartida and Trigonotarbida) appears to be artificial (Shear et al 1987;Shear and Kukalová-Peck 1990;Dunlop 1996b) and both have been reunited under the better defined name Trigonotarbida.…”

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confidence: 99%

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A trigonotarbid arachnid from the Lower Devonian of Tredomen, Wales

Dunlop¹,

Selden²

2004

Palaeontology

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ABSTRACT. A new trigonotarbid (Arachnida: Trigonotarbida) Arianrhoda bennetti gen. et sp. nov. is described from the Lower Devonian (Lochkovian) of a quarry near Tredomen, Powys, mid Wales, UK. This relatively complete specimen is the first record of a pre-Carboniferous arachnid from Wales, one of only a handful of early Devonian arachnids, and the second oldest trigonotarbid recorded. Based on the rounded prosomal dorsal shield and the relatively narrow, elongate opisthosoma we refer this new fossil to the family Anthracosironidae. A distinct flange-like ornament on the leg 4 tibia in the new fossil is unique among trigonotarbids and is the primary autapomorphy for the new genus.

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The evolutionary challenges of extreme environments (Part 1)

Waterman

1999

J. Exp. Zool.

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Fossils of large terrestrial arthropods from the Lower Devonian of Canada

Cited by 63 publications

References 14 publications

A Review of Proterozoic to Early Paleozoic Lithotectonic Terranes in New Brunswick, Canada and their Tectonic Evolution during Penobscot, Taconic, Salinic and Acadian Orogenesis

A Review of Proterozoic to Early Paleozoic Lithotectonic Terranes in New Brunswick, Canada and their Tectonic Evolution during Penobscot, Taconic, Salinic and Acadian Orogenesis

A trigonotarbid arachnid from the Lower Devonian of Tredomen, Wales

The evolutionary challenges of extreme environments (Part 1)

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