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Symphysurina

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Fig. 12. Symphysurina sp. from PH 8.14F, Shallow Bay Formation, Cow Hea...

Published: 30 May 2008
Fig. 12. Symphysurina sp. from PH 8.14F, Shallow Bay Formation, Cow Head Peninsula, western Newfoundland, Canada. ( a – d ) Cranidium, ROM 58146, dorsal, postero-dorsal, lateral, and oblique views, ×3; ( e – g ) pygidium, ROM 58147, dorsal, lateral, and posterior views, ×12.
Image
Figure9—Lower Ordovician trilobite Symphysurina myopia Westrop n. sp. from the Tribes Hill Formation, Wolf Hollow Member, at Tristates Quarry, sample TrQ-32. 1, cranidium, paratype NYSM 15241, dorsal view, ×9.3; 2, 3, nearly complete exoskeleton (latex cast of internal mold), paratype NYSM 16821, lateral and dorsal views, ×7.5; 4, 5, holotype cranidium, NYSM 16822, dorsal and anterior-oblique views, ×7.0; 6, 7, paratype cranidium, NYSM 16823, dorsal and anterior-oblique views, ×7.5; 8, paratype cranidium, NYSM 16824, dorsal view, ×8.0; 9, pygidium, paratype NYSM 16825, dorsal view, ×9.3; 10, pygidium, paratype NYSM 16826, dorsal view, ×8.0; 11, 12, pygidium, paratype NYSM 16827, lateral and dorsal views, ×7.0

Figure 9 —Lower Ordovician trilobite Symphysurina myopia Westrop n. sp. ...

Published: 01 January 2003
Figure 9 —Lower Ordovician trilobite Symphysurina myopia Westrop n. sp. from the Tribes Hill Formation, Wolf Hollow Member, at Tristates Quarry, sample TrQ-32. 1, cranidium, paratype NYSM 15241, dorsal view, ×9.3; 2, 3, nearly complete exoskeleton (latex cast of internal mold), paratype NYSM
Journal Article

Early Ordovician (Skullrockian) trilobites of the Antiklinalbugt Formation, northeast Greenland, and their biostratigraphic significance

Lucy M. E. McCobb, W. Douglas Boyce, Ian Knight, Svend Stouge
Published: 01 September 2014
Journal of Paleontology (2014) 88 (5): 982–1018.
DOI: https://doi.org/10.1666/11-135
...), and during recent field studies in 2000 and 2001. The fauna includes dimeropygids Tulepyge cowiei and T. tesella n. spp., hystricurids Millardicurus and Hystricurus , and several species of Symphysurina. Micragnostus chiushuensis ( Kobayashi, 1931 ) is rare, as are Chasbellus sp., Clelandia sp...
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View PDF for article title, Early Ordovician (Skullrockian) trilobites of the Antiklinalbugt Formation, northeast Greenland, and their biostratigraphic significance
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Trilobites from the Antiklinalbugt Formation, Northeast Greenland. 1, 2, 4, Symphysurina cf. S. brevispicata: 1, librigena, ventral view, NMW97.56G.33.1, fossil horizon AO; 2, librigena, dorsal view, exfoliated, NMW97.56G.614, fossil horizon AO; 3, Symphysurina robustaPoulsen, 1937, pygidium (holotype), dorsal view, partially exfoliated, MGUH 3660; 4, pygidium, dorsal view, testate, NMW97.56G.140, fossil horizon 56; 5, 6, Symphysurina cf. S. brevispicataHintze, 1953: 5, pygidium, dorsal view, exfoliated, NMW97.56G.31, fossil horizon AR; 6, librigena, exfoliated, GM 2011.133, fossil horizon 467926; 7–9, S. cf. S. robusta: 7, pygidium, dorsal view, exfoliated, NMW97.56G.167, fossil horizon 65; 8, pygidium, dorsal view, exfoliated, NMW97.56G.638, fossil horizon 65; 9, latex cast of external mold of exfoliated pygidium, dorsal view, NMW97.56G.159, fossil horizon 65; 10–14, Symphysurina sp. indet. 1; 10–12, pygidium, testate, GM 2011.1; 13, librigena, exfoliated, GM 2011.2; 14, librigena, exfoliated, GM 2011.137, fossil horizon 467930; 15, Symphysurina sp. indet. 2, librigena, dorsal view, exfoliated, NMW97.56G.615.3, fossil horizon AO. Scale bars: 1, 2, 6, 10–13=1 mm; 5, 7, 9, 14, 15=2 mm; and 3, 8=3 mm.

Trilobites from the Antiklinalbugt Formation, Northeast Greenland. 1 , 2 ...

Published: 01 September 2014
Figure 18 Trilobites from the Antiklinalbugt Formation, Northeast Greenland. 1 , 2 , 4 , Symphysurina cf. S. brevispicata : 1 , librigena, ventral view, NMW97.56G.33.1, fossil horizon AO; 2 , librigena, dorsal view, exfoliated, NMW97.56G.614, fossil horizon AO; 3 , Symphysurina
Image
Trilobites from the Antiklinalbugt Formation, Northeast Greenland, and the Cape Clay Formation, Northwest Greenland. 1–5, 7, Symphysurina cf. S. elegans: 1, librigena, ventral view of doublure, NMW97.56G.609.1, fossil horizon AJ; 2, pygidium, dorsal view, testate, NMW97.56G.173, fossil horizon 65; 3, pygidium, dorsal view, testate, NMW97.56G.142, near fossil horizon 57; 4, pygidium, partly exfoliated, GM 2011.84, fossil horizon 467926; 5, cranidium, partly exfoliated, GM 2011.86, fossil horizon 467926; 6, Symphysurina sp. indet. 5., cranidium, exfoliated, GM2011.129, fossil horizon 467933; 7, S. cf. S. elegans, pygidium, exfoliated, GM 2011.85, fossil horizon 467926; 8–13, Symphysurina poriferaPoulsen, 1927: 8, pygidium (paratype of Symphysurina inermisPoulsen, 1927, MGUH 2362), dorsal view, partially exfoliated, Cape Clay Formation, Cape Clay, Northwest Greenland; 9, pygidium, dorsal view, latex cast of largely exfoliated NMW97.56G.28b, fossil horizon AS; 10, pygidium (paratype), dorsal view, exfoliated, MGUH 2361; Cape Clay Formation, Cape Clay, Northwest Greenland; 11, pygidium (paratype), dorsal view, exfoliated, MGUH 2359; Cape Clay Formation, Cape Clay, Northwest Greenland; 12, pygidium, dorsal view, latex cast of exfoliated external mold, NMW97.56G.146, fossil horizon 73; 13, cranidium (paratype), dorsal view, largely exfoliated, MGUH 2358; Cape Clay Formation, Cape Clay, Northwest Greenland; 14, Symphysurina cf. S. porifera, latex cast of external mold of exfoliated cranidium, dorsal view, NMW97.56G.148b, fossil horizon 73; 15, Symphysurina cf. S. brevispicata, librigena, dorsal view, exfoliated, NMW97.56G.94.2, fossil horizon AM. Scale bars=2 mm except 1, 9, 12, 13=3 mm; 3, 6, 15=1 mm and 8, 11, 14=5 mm.

Trilobites from the Antiklinalbugt Formation, Northeast Greenland, and the ...

Published: 01 September 2014
Figure 17 Trilobites from the Antiklinalbugt Formation, Northeast Greenland, and the Cape Clay Formation, Northwest Greenland. 1–5 , 7 , Symphysurina cf. S. elegans : 1 , librigena, ventral view of doublure, NMW97.56G.609.1, fossil horizon AJ; 2 , pygidium, dorsal view, testate
Journal Article

Lower Ordovician (Ibexian) trilobites from the Tribes Hill Formation, central Mohawk Valley, New York State

Stephen R. Westrop, Leanne A. Knox, Ed Landing
Published: 01 August 1993
Canadian Journal of Earth Sciences (1993) 30 (8): 1618–1633.
DOI: https://doi.org/10.1139/e93-140
... by Middle Ordovician strata. More than 800 trilobites from 24 collections are assigned to six species: Bellefontia gyracantha (Raymond), Clelandia parabola (Cleland), Hystricurus ellipticus (Cleland), Hystricurus cf. Hystricurus oculilunatus Ross, Symphysurina convexa (Cleland), and Symphysurina cf...
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Book Chapter

Biostratigraphy of Cambrian and Lower Ordovician Strata in the Llano Uplift, Central Texas

Author(s)
John F. Taylor, James D. Loch, James F. Miller
Book: Great American Carbonate Bank: The Geology and Economic Resources of the Cambrian—Ordovician Sauk Megasequence of Laurentia
Series: AAPG Memoir
Publisher: The American Association of Petroleum Geologists
Published: 01 January 2012
DOI: 10.1306/13331494M983498
EISBN: 9781629810201
... allow recognition of 13 biozones that extend from the Bolaspidella Biozone (Cambrian System, Marjuman Stage) through the Symphysurina Zone (Ordovician System, upper Skullrockian Stage). Systematic collection of conodonts has produced specimens assignable to 13 zones that range from...
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View PDF for content titled, Biostratigraphy of Cambrian and Lower Ordovician Strata in the Llano Uplift, Central Texas
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Abstract Decimeter-scale sampling of the Cambrian and the lowermost Ordovician (Sauk megasequence) rocks of the Llano uplift, Texas, has produced a finely resolved biostratigraphic framework based primarily on trilobites and conodonts. Systematically collected trilobites of the Llano Uplift allow recognition of 13 biozones that extend from the Bolaspidella Biozone (Cambrian System, Marjuman Stage) through the Symphysurina Zone (Ordovician System, upper Skullrockian Stage). Systematic collection of conodonts has produced specimens assignable to 13 zones that range from the Proconodontus tenuiserratus Zone (Cambrian System, Sunwaptan Stage) through the Rossodus manitouensis Zone (Ordovician System, upper Skullrockian Stage). The base of the Ordovician System in the Llano uplift, as elsewhere, has been identified by the lowest occurrence of the conodont Iapetognathus fluctivagus and is closely approximated by the lowest occurrences of the cosmopolitan trilobite Juyjuyaspis and the Laurentian trilobite Symphysurina “bulbosa.” Although the overlying Ordovician strata of the Ellenburger Group have not been systematically sampled, scattered trilobite collections do establish the approximate positions of the base of the Stairsian Stage (based on Paraplethopeltis ) and the base of the Jeffersonian Stage (based on Rananasus and Jeffersonia ) in the Tanyard and Honeycut Formations, respectively.

Journal Article

Stratigraphy of Upper Cambrian-Lower Ordovician Subsurface Sequence in Williston Basin

Christina Lochman-Balk, James Lee Wilson
Journal: AAPG Bulletin
Published: 01 June 1967
AAPG Bulletin (1967) 51 (6): 883–917.
DOI: https://doi.org/10.1306/5D25C0FB-16C1-11D7-8645000102C1865D
... of a depositional break between the Upper Cambrian and the Lower Ordovician, and beds at this level carry the transitional Apoplanias faunule. An arbitrary boundary is placed at the first appearance of Symphysurina and (or) the associated Euloma . Faunas of the Lower Ordovician trilobite Zones A, B, C, D, E, and G...
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Trilobites from the Antiklinalbugt Formation, Northeast Greenland. 1, Symphysurina sp. indet. 3, latex cast of external mold of largely exfoliated cranidium, dorsal view, NMW97.56G.147b, fossil horizon 73; 2, Symphysurina sp. indet. 4, latex cast of external mold of largely exfoliated hypostome, ventral view, NMW97.56G.179, fossil horizon 65; 3, Clelandia sp. indet., cranidium, exfoliated, GM 2011.4, fossil horizon 467933; 4, Chasbellus sp. indet., pygidium, dorsal view, largely exfoliated, NMW97.56G.180, fossil horizon 71; 5, Chasbellus? sp. indet., pygidium, exfoliated, weathered, GM 2011.3, fossil horizon 467921; 6, Symphysurina? sp. indet., pygidium, dorsal view, exfoliated, NMW97.56G.187, fossil horizon 68; 7, Clelandia species indet., cranidium, dorsal view, exfoliated badly weathered, NMW97.56G.699, 20.2 m above base of Upper Transition Limestones; 8–12, Lunacrania? sp. indet., cranidium, testate, GM 2011.5a, fossil horizon 467929. Scale bars: 3–5, 7–12=1 mm and 1, 2, 6=2 mm.

Trilobites from the Antiklinalbugt Formation, Northeast Greenland. 1 , S...

Published: 01 September 2014
Figure 19 Trilobites from the Antiklinalbugt Formation, Northeast Greenland. 1 , Symphysurina sp. indet. 3, latex cast of external mold of largely exfoliated cranidium, dorsal view, NMW97.56G.147b, fossil horizon 73; 2 , Symphysurina sp. indet. 4, latex cast of external mold
Journal Article

ADDITIONAL INFORMATION ON LOWEST ORDOVICIAN TRILOBITES FROM THE UPPERMOST DEADWOOD FORMATION, BLACK HILLS AND BEAR LODGE MOUNTAINS, SOUTH DAKOTA AND WYOMING

JAMES H. STITT
Published: 01 March 2000
Journal of Paleontology (2000) 74 (2): 360–362.
DOI: https://doi.org/10.1666/0022-3360(2000)074<0360:AIOLOT>2.0.CO;2
...JAMES H. STITT 05 11 1999 The Paleontological Society 2000 The trilobites and brachiopods from the Missisquoia Zone and Symphysurina brevispicata Subzone of the Symphysurina Zone in the uppermost Deadwood Formation in the Black Hills and Bear Lodge Mountains are similar...
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Journal Article

Olenid-dominated trilobite fauna from the Shallow Bay Formation (Cow Head Group), Cambrian–Ordovician boundary interval, western Newfoundland

Talia S. Karim
Published: 30 May 2008
Canadian Journal of Earth Sciences (2008) 45 (4): 407–425.
DOI: https://doi.org/10.1139/E08-008
...Fig. 12. Symphysurina sp. from PH 8.14F, Shallow Bay Formation, Cow Head Peninsula, western Newfoundland, Canada. ( a – d ) Cranidium, ROM 58146, dorsal, postero-dorsal, lateral, and oblique views, ×3; ( e – g ) pygidium, ROM 58147, dorsal, lateral, and posterior views, ×12. ...
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View PDF for article title, Olenid-dominated trilobite fauna from the Shallow Bay Formation (Cow Head Group), Cambrian–Ordovician boundary interval, western Newfoundland
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Journal Article

MATTHEVIA (POLYPLACOPHORA) INVADES THE ORDOVICIAN: THE FIRST REPORTED POST-CAMBRIAN OCCURRENCE

JOHN POJETA, JR., JOHN F. TAYLOR, GUY DARROUGH
Published: 01 September 2005
Journal of Paleontology (2005) 79 (5): 1021–1027.
DOI: https://doi.org/10.1666/0022-3360(2005)079[1021:MPITOT]2.0.CO;2
... Sunwaptan ( Rasettia magna Subzone, possibly slightly older) to Skullrockian ( Symphysurina woosteri Subzone) ( Fig. 4 ). Runnegar et al. (1979 , p. 1390) discussed the uncertainty regarding the age of the lowest occurrence of the oldest known species, Matthevia variabilis Walcott, 1885...
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Journal Article

Left behind – delayed extinction and a relict trilobite fauna in the Cambrian–Ordovician boundary succession (east Laurentian platform, New York)

ED LANDING, STEPHEN R. WESTROP, BJÖRN KRÖGER, ADAM M. ENGLISH
Published: 19 November 2010
Geological Magazine (2011) 148 (4): 529–557.
DOI: https://doi.org/10.1017/S0016756810000919
... Zone). These data prove that the trilobites are a relict fauna that persisted into the Symphysurina Zone of the Skullrockian Stage. The massive (burrow-churned), mollusc-dominated Ritchie Limestone, with the second Upper Cambrian cephalopod locality in east Laurentia, represents an inner-shelf refugium...
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Journal Article

Stratigraphic Implications of Lower Ordovician Conodonts from the Munising and Au Train Formations at Pictured Rocks National Lakeshore, Upper Peninsula of Michigan

JAMES F. MILLER, RAYMOND L. ETHINGTON, ROBERT ROSÉ
Journal: PALAIOS
Published: 01 June 2006
PALAIOS (2006) 21 (3): 227–237.
DOI: https://doi.org/10.2110/palo.2004.p04-50
... probably represent the Symphysurina Zone ( S. woosteri Subzone) and confirm the Early Ordovician age of the Au Train. The presence of middle Late Cambrian (Franconian) trilobites in the underlying Munising Formation led to traditional assumption of a major hiatus between the Munising and the Au Train...
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Journal Article

UPPERMOST CAMBRIAN–LOWER ORDOVICIAN FAUNAS AND LAURENTIAN PLATFORM SEQUENCE STRATIGRAPHY, EASTERN NEW YORK AND VERMONT

ED LANDING, STEPHEN R. WESTROP, LINDA VAN ALLER HERNICK
Published: 01 January 2003
Journal of Paleontology (2003) 77 (1): 78–98.
DOI: https://doi.org/10.1666/0022-3360(2003)077<0078:UCLOFA>2.0.CO;2
...Figure 9 —Lower Ordovician trilobite Symphysurina myopia Westrop n. sp. from the Tribes Hill Formation, Wolf Hollow Member, at Tristates Quarry, sample TrQ-32. 1, cranidium, paratype NYSM 15241, dorsal view, ×9.3; 2, 3, nearly complete exoskeleton (latex cast of internal mold), paratype NYSM...
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View PDF for article title, UPPERMOST CAMBRIAN–LOWER ORDOVICIAN FAUNAS AND LAURENTIAN PLATFORM SEQUENCE STRATIGRAPHY, EASTERN NEW YORK AND VERMONT
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Journal Article

Dotsero and Manitou Formations, White River Plateau, Colorado, with Special Reference to Clinetop Algal Limestone Member of Dotsero Formation

N. Wood Bass, Stuart A. Northrop
Journal: AAPG Bulletin
Published: 01 May 1953
AAPG Bulletin (1953) 37 (5): 889–912.
DOI: https://doi.org/10.1306/5CEADCB3-16BB-11D7-8645000102C1865D
... fragments in acetic acid residue 3. Grizzly Creek. Collections 8–11 were made at four places north and northeast of the headwaters of Grizzly Creek, about 1–3 miles from the township corner common to Tps. 3 and 4 S., Rs. 88 and 89 W. ( Fig. 2 , column 2). Ordovician, subzone A Symphysurina...
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View PDF for article title, Dotsero and Manitou Formations, White River Plateau, Colorado, with Special Reference to Clinetop Algal Limestone Member of Dotsero Formation
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Journal Article

Correlation of the Cambrian-Ordovician boundary between the Acado-Baltic and North American faunal provinces

Ed Landing, Michael E. Taylor, Bernd-Dietrich Erdtmann
Journal: Geology
Published: 01 February 1978
Geology (1978) 6 (2): 75–78.
DOI: https://doi.org/10.1130/0091-7613(1978)6<75:COTCBB>2.0.CO;2
... and Symphysurina Zones, suggest but do not prove an approximate equivalency of the Cambrian-Ordovician boundary in the two faunal provinces. Geological Society of America 1978 ...
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Journal Article

Basal Ordovician faunas from the Williston Basin, Montana

Christina Lochman
Published: 01 May 1964
Journal of Paleontology (1964) 38 (3): 453–476.
..., pyritic shales interbedded with a few glauconitic limestone pebble conglomerates. Zone A faunules are characterized by long-ranging graptolites and brachiopods with trilobites of Symphysurina species and Euloma cordilleri n. sp. Zone B faunules, in over 100 ft of section, contain many of the trilobites...
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Journal Article

NEW EARLIEST ORDOVICIAN TRILOBITE GENUS MILLARDICURUS : THE OLDEST KNOWN HYSTRICURID

JONATHAN M. ADRAIN, STEPHEN R. WESTROP
Published: 01 July 2006
Journal of Paleontology (2006) 80 (4): 650–671.
DOI: https://doi.org/10.1666/0022-3360(2006)80[650:NEOTGM]2.0.CO;2
... fairly commonly, B-1 is also the type horizon of Symphysurina brevispicata Hintze, 1953 , which is abundant at B 1.1 m. Other species present at B 1.1 m include a common second, broad-tailed, species of Symphysurina Ulrich in Walcott, 1924 (similar to or possibly conspecific with a taxon from...
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Journal Article

Linguliform brachiopods across a Cambrian–Ordovician (Furongian, Early Ordovician) biomere boundary: the Sunwaptan–Skullrockian North American Stage boundary in the Wilberns and Tanyard formations of central Texas

Rebecca L. Freeman, James F. Miller, Benjamin F. Dattilo
Published: 30 May 2018
Journal of Paleontology (2018) 92 (5): 751–767.
DOI: https://doi.org/10.1017/jpa.2018.8
... intermedius conodont Zone and from the Symphysurina trilobite Zone, in the San Saba Member of the Wilberns Formation, Texas; all are from sample TC-1460; scale bar is 300 μm ( 1, 2 ) and 500 μm ( 3, 6, 7 ): ( 1, 2 ) ventral valve exterior and oblique exterior (NPL 45471); ( 3–5 ) dorsal valve exterior...
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View PDF for article title, Linguliform brachiopods across a Cambrian–Ordovician (Furongian, Early Ordovician) biomere boundary: the Sunwaptan–Skullrockian North American Stage boundary in the Wilberns and Tanyard formations of central Texas
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