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Benthic associations recognized in the Dinwoody data set showing frequencies of identified fossils, the trophic nucleus, guild species diversity based on the number of species representing benthic guilds (large pie charts) as well as absolute abundance of guilds (small piecharts). These diagrams are based on merged samples that were grouped into one association in the cluster algorithm. 1, Unionites fassaensis association; 2, Unionites fassaensis-Pteria ussurica association; 3, Unionites fassaensis-Lingula borealis association; 4, Eumorphotis multiformis association; 5, Pteria ussurica association; 6, Lingula borealis association; 7, Leptochondria occidanea association.

Benthic associations recognized in the Dinwoody data set showing frequencie... Available to Purchase

Published: 01 September 2013
). These diagrams are based on merged samples that were grouped into one association in the cluster algorithm. 1 , Unionites fassaensis association; 2 , Unionites fassaensis-Pteria ussurica association; 3 , Unionites fassaensis-Lingula borealis association; 4 , Eumorphotis multiformis association; 5
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Determined bivalves from the Muć-Ogorje succession. A) Bivalve Claraia sp. from the lower, Dienerian part of the succession. B) Eumorphotis multiformis from the Dienerian part. C) Costatoria sp. and Unionites sp. D) Various Unionites bivalves, and small gregarious nuculids between larger taxa. E) Thin section with Avichlamys sp., upper, Spathian, part of the studied succession.

Determined bivalves from the Muć-Ogorje succession. A ) Bivalve Claraia ... Available to Purchase

Published: 31 January 2022
Fig. 7.— Determined bivalves from the Muć-Ogorje succession. A ) Bivalve Claraia sp. from the lower, Dienerian part of the succession. B ) Eumorphotis multiformis from the Dienerian part. C ) Costatoria sp. and Unionites sp. D ) Various Unionites bivalves, and small gregarious
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Figure 5. Photos of Early Triassic bivalves. A, Claraia. B, Eumorphotis. C, Promyalina. D, Unionites

Figure 5. Photos of Early Triassic bivalves. A, Claraia . B, Eumorphotis... Available to Purchase

Published: 01 August 2007
Figure 5. Photos of Early Triassic bivalves. A, Claraia . B, Eumorphotis . C, Promyalina . D, Unionites
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Benthic assemblages that were not assigned to associations in the cluster algorithm. See Figure 10 for legend and explanations. 1, Periallus woodsidensis assemblage; 2, Permophorus bregeri assemblage; 3, Unionites canalensis assemblage.

Benthic assemblages that were not assigned to associations in the cluster a... Available to Purchase

Published: 01 September 2013
Figure 11 Benthic assemblages that were not assigned to associations in the cluster algorithm. See Figure 10 for legend and explanations. 1 , Periallus woodsidensis assemblage; 2 , Permophorus bregeri assemblage; 3 , Unionites canalensis assemblage.
Journal Article

A New Paleoecological Look at the Dinwoody Formation (Lower Triassic, Western USA): Intrinsic Versus Extrinsic Controls on Ecosystem Recovery After the End-Permian Mass Extinction Available to Purchase

Richard Hofmann, Michael Hautmann, Hugo Bucher
Published: 01 September 2013
Journal of Paleontology (2013) 87 (5): 854–880.
DOI: https://doi.org/10.1666/12-153
...). These diagrams are based on merged samples that were grouped into one association in the cluster algorithm. 1 , Unionites fassaensis association; 2 , Unionites fassaensis-Pteria ussurica association; 3 , Unionites fassaensis-Lingula borealis association; 4 , Eumorphotis multiformis association; 5...
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View PDF for article title, A New Paleoecological Look at the Dinwoody Formation (Lower Triassic, Western USA): Intrinsic Versus Extrinsic Controls on Ecosystem Recovery After the End-Permian Mass Extinction
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Figure 1

Images of the five genera of Early Triassic disaster genera as summarized b... Available to Purchase

Published: 28 April 2016
Figure 1 Images of the five genera of Early Triassic disaster genera as summarized by Benton ( 2003 ). (A) Unionites cf. canalensis , (B) Promyalina cf. putiatinensis , (C) Lingularia borealis , (D) Eumorphotis cf. virginensis , and (E) Claraia aurita . Scale
Journal Article

Quantitative analysis of the ecological dominance of benthic disaster taxa in the aftermath of the end-Permian mass extinction Available to Purchase

Elizabeth Petsios, David J. Bottjer
Journal: Paleobiology
Published: 28 April 2016
Paleobiology (2016) 42 (3): 380–393.
DOI: https://doi.org/10.1017/pab.2015.47
...Figure 1 Images of the five genera of Early Triassic disaster genera as summarized by Benton ( 2003 ). (A) Unionites cf. canalensis , (B) Promyalina cf. putiatinensis , (C) Lingularia borealis , (D) Eumorphotis cf. virginensis , and (E) Claraia aurita . Scale...
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View PDF for article title, Quantitative analysis of the ecological dominance of benthic disaster taxa in the aftermath of the end-Permian mass extinction
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Body fossils of the Dinwoody Formation recognized in this study. 1, Myalinella postcarbonica, right valve, HS, PIMUZ 30523;2, Promyalina spathi, left valve, GV-A-4, PIMUZ 30538;3, Promyalina putiatinensis, right valve, LPA-2, PIMUZ 30528;4, Pteria? ussurica, left valve, GV-A-8, PIMUZ 30540;5, Claraia mulleri, left valve, float at section GV-A, PIMUZ 30539;6, Claraia mulleri, left valve, GV-A-5, PIMUZ 30541;7, Claraia cf. stachei, left valve, LPA-A, PIMUZ 30529;8, Claraia aurita, left valve, CM, PIMUZ 30531;9, Claraia aurita, right valve, CM, PIMUZ 30532;10, Leptochondria occidanea, left valve, LPA-2, PIMUZ 30527;11, Eumorphotis amplicostata, left valve, HP-2L, PIMUZ 30537;12, Eumorphotis amplicostata, left valve, LS-5/b, PIMUZ 30536;13, Eumorphotis multiformis, left valve, LS-7, PIMUZ 30533;14, Eumorphotis multiformis, right valve, LS-7, PIMUZ 30534;15, Eumorphotis cf. ericius, left valve, LS-7, PIMUZ 30535;16, Permophorus bregeri, right valve, HS, PIMUZ 30524;17, Unionites fassaensis, left valve, GV-A-3, PIMUZ 30542;18, Unionites fassaensis, right valve, GV-B-1, PIMUZ 30543;19, Unionites canalensis, left valve, GV-B-2, PIMUZ 30544;20, Neoschizodus laevigatus, right valve, GV-A-5, PIMUZ 30545;21, Dicellonema abrekensisLPA-2, lateral view, PIMUZ 30526;22, Dicellonema abrekensis,, LPA-2, dorsal view, PIMUZ 30526;23, Coelostylina sp. A, HS, PIMUZ 30525;24, Lingula borealis, ventral valve, GV-B-B, PIMUZ 30546; 25, Periallus woodsidensis, dorsal valve, TM-4, PIMUZ 30530. If not otherwise indicated, all scale bars=5 mm.

Body fossils of the Dinwoody Formation recognized in this study. 1 , My... Available to Purchase

Published: 01 September 2013
, PIMUZ 30533 ; 14 , Eumorphotis multiformis , right valve, LS-7, PIMUZ 30534 ; 15 , Eumorphotis cf. ericius , left valve, LS-7, PIMUZ 30535 ; 16 , Permophorus bregeri , right valve, HS, PIMUZ 30524 ; 17 , Unionites fassaensis , left valve, GV-A-3, PIMUZ 30542 ; 18 , Unionites
Journal Article

The Unionville, Pennsylvania, corundum mines Available to Purchase

Hugh E. Mckinstry
Published: 01 September 1921
American Mineralogist (1921) 6 (9): 135–137.
... quantities; and due to the zeal of the early Chester County mineralogists, it was the type locality for some five mineral species (all since reduced to the status of varieties): Euphyllite, pattersonite, lesleyite, unionite and corundellite. Copyright © 1921 by the Mineralogical Society of America 1921...
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Schematic depiction of the faunal assemblages grouped by evolutionary change points identified with AIC and BIC rankings of the paleoecological data. Taxa: (1) Avicula, (2) Bakevellia, (3) Isognomon, (4) Aguilerella, (5) Palaeoneilo, (6) Costatoria, (7) Nucula, (8) gastropod, (9) Hoferia, (10) Modiolus, (11) Unionites, (12) Myophoricardium, (13) Myophoriopis, (14) Pinna, (15) Nuculana, (16) Schafhauetlia.

Schematic depiction of the faunal assemblages grouped by evolutionary chang... Available to Purchase

Published: 01 August 2012
) Hoferia, (10) Modiolus, (11) Unionites, (12) Myophoricardium, (13) Myophoriopis, (14) Pinna, (15) Nuculana, (16) Schafhauetlia.
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Paleoecology of the Triassic–Jurassic interval in the Gabbs Valley Range, M... Available to Purchase

Published: 01 April 2016
. Plicatostylus, Pecten, Entollium, and Ctenostreon , but we do not distinguish here which were most abundant. ** Astarte, Cassianella, Unionites, Chlamys, Myophoria, Septocardia, and Malletiidae, Permophoridae, heterodontid, pectinacean. *** Nuculana, Miophoricardium .
Journal Article

Triassic stratigraphy of the Eastern Laptev Sea coast and New Siberian Islands Available to Purchase

A.G. Konstantinov, E.S. Sobolev, A.V. Yadrenkin
Published: 01 August 2013
Russ. Geol. Geophys. (2013) 54 (8): 792–807.
DOI: https://doi.org/10.1016/j.rgg.2013.07.004
... , Mytilus , Pseudocorbula , Neoschizodus , Unionites , Janaja ; brachiopods Orbiculoidea sp. At its type locality, the formation spans the Lower Anisian (solitaries Zone, tumaefactus Subzone)—Upper Anisian interval (rotelliforme Zone). The formation attains a thickness of 77–128 m in the Olenek...
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View PDF for article title, Triassic stratigraphy of the Eastern Laptev Sea coast and New Siberian Islands
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CHANGES IN ENVIRONMENTAL CONDITIONS, BIOTA, AND DEPOSITIONAL PATTERNS WITHIN LOWER TRIASSIC CLASTIC AND CARBONATE DEPOSITS, MUĆ-OGORJE, CENTRAL DALMATIA (CROATIA) Available to Purchase

KARMEN FIO FIRI, KATARINA GOBO, JASENKA SREMAC, FRANE MARKOVIĆ
Journal: PALAIOS
Published: 31 January 2022
PALAIOS (2022) 37 (1): 16–33.
DOI: https://doi.org/10.2110/palo.2020.082
...Fig. 7.— Determined bivalves from the Muć-Ogorje succession. A ) Bivalve Claraia sp. from the lower, Dienerian part of the succession. B ) Eumorphotis multiformis from the Dienerian part. C ) Costatoria sp. and Unionites sp. D ) Various Unionites bivalves, and small gregarious...
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View PDF for article title, CHANGES IN ENVIRONMENTAL CONDITIONS, BIOTA, AND DEPOSITIONAL PATTERNS WITHIN LOWER TRIASSIC CLASTIC AND CARBONATE DEPOSITS, MUĆ-OGORJE, CENTRAL DALMATIA (CROATIA)
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Hypothetical paleodepositional settings for the early Triassic lower Montney Formation units. Shallow marine basin with highs and lows provided an exclusive environment for proliferation of bivalve species of Unionites and Claraia, which led to thick carbonate deposits. Coastal environments had some terrestrial influx but cores from that area are not available. The basin must have been isolated from the volcanic arc as there is little evidence of ash deposits or volcanic influx. However, the volcanic activity further north and in the Arctic may have contributed nutrients and silica for biogenic siliceous phytoplankton which, together with carbonate sediments, built up the lowermost Montney deposits. Extension tectonism allowed thick sediment sequences to be deposited which, during later times, experienced elevated fluid flow (due to high sediment porosity) and diagenetic alteration. Earliest diagenesis along the coastline under the influence of groundwater flow led to the preservation of some coquina units.

Hypothetical paleodepositional settings for the early Triassic lower Montne... Available to Purchase

Published: 01 June 2018
Figure 26. Hypothetical paleodepositional settings for the early Triassic lower Montney Formation units. Shallow marine basin with highs and lows provided an exclusive environment for proliferation of bivalve species of Unionites and Claraia , which led to thick carbonate deposits. Coastal
Journal Article

Facies changes across the Triassic–Jurassic boundary in Nevada, USA Available to Purchase

A. HALLAM, P. B. WIGNALL
Published: 01 January 2000
Journal of the Geological Society (2000) 157 (1): 49–54.
DOI: https://doi.org/10.1144/jgs.157.1.49
... approximately 85% of the assemblage. Other fauna includes the bivalves Septocardia (5% of the fauna), and a malletiid, possibly Unionites, the gastropod Amberleya, Choristoceras, orthocone nautiloids and an ichthyosaur vertebra. This assemblage clearly belongs to Laws’ Nuculoma Association and appears...
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View PDF for article title, Facies changes across the Triassic–Jurassic boundary in Nevada, USA
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LATEST TRIASSIC–EARLIEST JURASSIC BIVALVES OF THE GERMIG FORMATION FROM LANONGLA (TIBET, CHINA) Available to Purchase

JIARUN YIN, CHRISTOPHER A. McROBERTS
Published: 01 January 2006
Journal of Paleontology (2006) 80 (1): 104–120.
DOI: https://doi.org/10.1666/0022-3360(2006)080[0104:LTJBOT]2.0.CO;2
... Chlamys valoniensis ( Defrance, 1825 ), Plagiostoma giganteum Sowerby, 1814 , Gervillia ( Cultriopsis ) angusta Münster, 1838 , and Unionites griesbachi ( Bittner, 1899 ). There appears to be, at least at the generic level, a high degree of similarity with the taxonomically rich fauna from...
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View PDF for article title, LATEST TRIASSIC–EARLIEST JURASSIC BIVALVES OF THE GERMIG FORMATION FROM LANONGLA (TIBET, CHINA)
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When bivalves took over the world Available to Purchase

Margaret L. Fraiser, David J. Bottjer
Journal: Paleobiology
Published: 01 August 2007
Paleobiology (2007) 33 (3): 397–413.
DOI: https://doi.org/10.1666/05072.1
...Figure 5. Photos of Early Triassic bivalves. A, Claraia . B, Eumorphotis . C, Promyalina . D, Unionites ...
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Evidence from Fossils: Bivalve Molluscs [Abstract] Available to Purchase

B. Runnegar
Published: 01 June 1971
Bulletin of Canadian Petroleum Geology (1971) 19 (2): 350–352.
DOI: https://doi.org/10.35767/gscpgbull.19.2.350
... . Moreover, although fossiliferous earliest Triassi c marine deposits are relatively rare, their fauna is surprisingly homo- geneous, being dominated in all parts of the world by ammonoids and th e bivalve genera Claraia, Leptochondr ia, Bcrkevellia, Promycdina, Neoschi- zodus, Unionites, and Pcda.eoneilo...
View PDF for article title, Evidence from Fossils: Bivalve Molluscs [Abstract]
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Limulitella tejraensis , a new species of limulid (Chelicerata, Xiphosura) from the Middle Triassic of southern Tunisia (Saharan Platform) Available to Purchase

Błażej Błażejowski, Grzegorz Niedźwiedzki, Kamel Boukhalfa, Mohamed Soussi
Published: 01 September 2017
Journal of Paleontology (2017) 91 (5): 960–967.
DOI: https://doi.org/10.1017/jpa.2017.29
... from freshwater horizon, large form (species B) described as cf. Dictyonatella sp. ( 4, 5 ) Bivalves from the freshwater horizon: ( 4 ) Unionites cf. brevis ; ( 5 ) Unionites cf. longus . Scale bar in ( 3–5 ) is 10 mm. Hammer for scale in ( 2 ) represents 30 cm. Placement...
View PDF for article title, Limulitella tejraensis , a new species of limulid (Chelicerata, Xiphosura) from the Middle Triassic of southern Tunisia (Saharan Platform)
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Chemostratigraphy, petrography, and SEM investigations of the Lower Triassic Montney Formation in Alberta: Implications for a new and revised diagenetic and depositional model Available to Purchase

Raphael A.J. Wüst, Sam Tu, Brent Nassichuk, Troy Bozarth, Jason Tucker, Albert Cui
Published: 01 June 2018
Bulletin of Canadian Petroleum Geology (2018) 66 (2): 436–471.
...Figure 26. Hypothetical paleodepositional settings for the early Triassic lower Montney Formation units. Shallow marine basin with highs and lows provided an exclusive environment for proliferation of bivalve species of Unionites and Claraia , which led to thick carbonate deposits. Coastal...
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View PDF for article title, Chemostratigraphy, petrography, and SEM investigations of the Lower Triassic Montney Formation in Alberta: Implications for a new and revised diagenetic and depositional model
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