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Agnostus

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Journal Article
Published: 01 March 1995
Journal of Paleontology (1995) 69 (2): 302-307.
Journal Article
Published: 28 May 2018
Geological Magazine (2019) 156 (6): 935-949.
... includes the Äleklinta Member (upper Stage 5) of the Borgholm Formation and the Alum Shale Formation (Guzhangian–Tremadocian). Agnostoids and trilobites allowed subdivision of the succession into eight biozones, in ascending order: the uppermost Cambrian Series 3 (Guzhangian) Agnostus pisiformis Zone...
FIGURES | View All (7)
Journal Article
Published: 01 January 2013
Journal of Paleontology (2013) 87 (1): 69-83.
... extending the biogeographical range of the species. Other elements of the faunal assemblage include typical Baltic Furongian representatives, such as the trilobite Parabolina , the agnostoid Agnostus and the phosphatocopids Hesslandona and Vestrogothia . 26 7 2012 The Paleontological Society...
FIGURES | View All (6)
Journal Article
Published: 02 April 2012
Geological Magazine (2012) 149 (6): 1001-1012.
... lunulosus and Agnostus ( Homagnostus ) obesus first appear at the base of the G . reticulatus Zone, allowing a precise correlation of the base of the Paibian Stage into Scandinavia. Tomagnostella orientalis and Pseudagnostus cyclopyge appear near the base of the Parabolina brevispina Zone, suggesting...
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Journal Article
Journal: PALAIOS
Published: 01 April 2011
PALAIOS (2011) 26 (4): 225-231.
... carcasses which have been replaced by calcium phosphate and occur in organic-rich nodular limestone. The exact cause and mechanism of this unusual fossil preservation, however, particularly the source of phosphorus, which plays a key role, remains unknown. Detailed observation in the Agnostus pisiformis...
FIGURES | View All (4)
Journal Article
Published: 01 July 2006
Geological Magazine (2006) 143 (4): 447-455.
...NIKLAS AXHEIMER; MATS E. ERIKSSON; PER AHLBERG; ANDERS BENGTSSON Abstract The middle Cambrian Lejopyge laevigata Zone is poorly exposed in Scandinavia. Both this zone, however, and the succeeding Agnostus pisiformis Zone are well exposed at a classic locality at Gudhem, Västergötland, south...
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Journal Article
Published: 01 May 1988
Canadian Journal of Earth Sciences (1988) 25 (5): 669-690.
... Formation (to replace the Hastings Cove and Agnostus Cove formations) and Silver Falls Formation (to replace the Black Shale Brook and Narrows formations). Lower Ordovician strata are referred to as the Reversing Falls Formation (to replace the Navy Island and Suspension Bridge formations). Descriptions...
Journal Article
Published: 01 December 1975
Canadian Journal of Earth Sciences (1975) 12 (12): 2065-2079.
... eastern Canada, is contained in the basal part of the Elliott Cove Formation and is conformably overlain by the Upper Cambrian Agnostus pisiformis Zone. The following trilobite species from the Lejopyge laevigata Zone at Manuels River and on Random Island are described: Andrarina costata (Angelin...
Series: AAPG Memoir
Published: 01 January 1973
DOI: 10.1306/M19375C31
EISBN: 9781629812199
... in trilobite assemblages allow division into three zones. The Middle-Upper Cambrian boundary is located in a continuous section on the basis of the disappearance of Lejopyge, Anomocarina, and Bonneferrina, and the appearance of species of Agnostus, Homagnostus, Damesella, Buttsia, Proceratopyge, and other...
Journal Article
Journal: AAPG Bulletin
Published: 01 December 1970
AAPG Bulletin (1970) 54 (12): 2494.
... also includes 3 zones. Throughout the area there was continuous sedimentation across the Middle-Upper Cambrian boundary. This boundary is based on the disappearance of Lejopyge, Anomocarina , and Bonneterrina and the appearance of species of Homagnostus, Agnostus, Damesella, Buttsia, Proceratopyge...
Journal Article
Journal: GSA Bulletin
Published: 01 January 1913
GSA Bulletin (1913) 24 (1): 625-668.
... .. microscopica 623 .. Actinoceras 503 .. Adirondack Island 332 .. Oscillations of 415 .. uplift 414 .. Adirondackia 339 .. Agnostus 493 .. Alabama basin 562,564,566 .. formations .. 27 Allegheny basin 562 .. formations .. 29 front .. .. Allentown formation 563 .. limestone 644 27 American Paleozoic stratigraphic...
Image
FIGURE 1. Geologic outline of the study area. A–B) Index maps. C) Geologic ...
in > PALAIOS
Published: 01 April 2011
FIGURE 1. Geologic outline of the study area. A–B) Index maps. C) Geologic map. 1–6  =  major localities of Orsten limestones. D) Columnar section of the Furongian Alum Shale Formation in Trolmen and in Backeborg showing the horizon of Orsten-type fossils. Ap  =  Agnostus pisiformis Zone, Ho
Image
Table  1 —Data matrix of 12 characters from different nektaspid taxa (see c...
Published: 01 November 2004
morphic for N. compacta (genal spines present or absent). Agnostus and Olenoides are designed as outgroups (OG) (see text for details)
Image
Composite profile of the Upper Cambrian Steptoean Positive Carbon Isotope E...
in > Geology
Published: 12 June 2018
.— Tomagnostella orientalis Zone; C . p .— Corynexochus plumula Zone; E . r .— Erixanium rectangularis Zone; A . i .— Agnostus inexpectans Zone; G . r .— Glyptagnostus reticulatus Zone; G . s .— G . stolidotus Zone; L . r .— Linguagnostus reconditus Zone; P . b .— Proagnostus bulbus Zone.
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Biostratigraphy and carbon-isotopic data for the Wa’ergang (A), Duibian B (...
in > Geology
Published: 12 June 2018
; A . o .— Agnostotes orientalis Zone; T . o .— Tomagnostella orientalis Zone; C . p .— Corynexochus plumula Zone; E . r .— Erixanium rectangularis Zone; A . i .— Agnostus inexpectans Zone; G . r .— Glyptagnostus reticulatus Zone; G . s .— G . stolidotus Zone; L . r .— Linguagnostus
Image
FIGURE 2. Pellet bed in the Furongian Orsten limestone in the Alum Shale Fo...
in > PALAIOS
Published: 01 April 2011
FIGURE 2. Pellet bed in the Furongian Orsten limestone in the Alum Shale Formation in Backeborg, Sweden. A) Vertical section of the typical Orsten limestone in the Agnostus pisiformis Zone, consisting of micrite beds, shell beds of A. pisiformis debris, and a cross-laminated pellet bed
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The stratigraphic range chart of acritarch species compiled from literature...
in > Palynology
Published: 01 January 2004
extension of the lower range of some species, which are not precisely defined in the references cited (see under Systematic Paleontology). Abbreviations are as follows: Cm 2 , Middle Cambrian; Cm 3 , Upper Cambrian; T, Tremadoc; 1, Lower Ordovician; 2, Middle Ordovician; 3, Upper Ordovician; Ag, Agnostus
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Figure  1 —Stratigraphic section of lower part of section N of the Rabbitke...
Published: 01 May 2002
the base of the Rabbitkettle, defining the Konyrium mariae faunule within the Olenaspella evansi Zone. Trilobite ranges and trilobite biozones are shown for the Steptoean portion (see Pratt, 1992 ). (More recent taxonomic studies have: placed Innitagnostus in synonymy with Agnostus — Peng
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Fossils from Cambrian Series 3 and the Furongian in the Grönhögen-2015 dril...
Published: 28 May 2018
Figure 4. Fossils from Cambrian Series 3 and the Furongian in the Grönhögen-2015 drill core. Scale bars correspond to 1 mm. (a) Agnostus pisiformis (Wahlenberg, 1818 ), cephala and pygidia from the A. pisiformis Zone (29.90 m), LO 12418t. (b–d) Olenus truncatus (Brünnich, 1781 ) from
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Remaining elements of the Västergötland faunal assemblage, including phosph...
Published: 01 January 2013
, LO11457t; 6 , indeterminate phosphatocopid, LO11458t; 7 , indeterminate phosphatocopid, scale bar=100 μm, LO11459t; 8 , indeterminate phosphatocopid, scale bar=100 μm, LO11460t; 9–24 , agnostoids and trilobites: 9–13 , Agnostus sp.: 9, 10 , LO11461t: 9 , dorsal view of incomplete first thoracic