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Acastella

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Journal Article
Published: 01 January 1959
Bulletin de la Société Géologique de France (1959) S7-I (9): 939–943.
...Jean Pillet Abstract The trilobite Acastella rouaulti, the only representative of the Phacopacea yet known in the lower Siegenian (Devonian) Dalmanella monnieri sandstone of the Armorican massif, France, is redescribed on the basis of several specimens found in a better state of preservation than...
Image
Lithological columns with information about positions of collected samples ...
Published: 22 August 2017
Figure 3. Lithological columns with information about positions of collected samples and the approximate level of the trilobite index fossil Acastella prima. Left: the top part of the section exposed at the Winnica locality (after Bodzioch, Kozłowski & Popławska, 2003 ). Right: uppermost
Journal Article
Published: 22 August 2017
Geological Magazine (2018) 155 (7): 1523–1541.
...Figure 3. Lithological columns with information about positions of collected samples and the approximate level of the trilobite index fossil Acastella prima. Left: the top part of the section exposed at the Winnica locality (after Bodzioch, Kozłowski & Popławska, 2003 ). Right: uppermost...
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Journal Article
Published: 01 July 2009
Bulletin de la Société Géologique de France (2009) 180 (4): 309–315.
...-Lochkovian strata (Celtiberian unit d2a-alpha4; elea-norae – early triognicus zone) together with Howellella cortazari and the last Acastella tiro as reported by Dojen [2005] . In the early late Lochkovian (unit d2a-beta5; pandora beta zone) Zygobeyrichia abounds for the first time on bedding...
FIGURES
Journal Article
Journal: Paleobiology
Published: 07 May 2014
Paleobiology (2014) 40 (3): 440–458.
... of the trilobite Acastella , 64% of the collections are from carbonates and 36% from clastics. This genus has 44 occurrences, 30 of which are from clastics. The probability of observing 30 or more clastic occurrences, if the true frequency is 36%, is only about 10 −5 , so this genus is assigned a clastic affinity...
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Journal Article
Published: 02 July 2009
Geological Magazine (2009) 146 (5): 674–689.
... 3.2 m above the top of the dark, nodular limestone interval, in the middle part of a sequence of interbedded greenish-grey argillaceous shales and marls containing dark grey limestone nodules. The boundary is characterized by the first appearance of the trilobite Acastella heberti Gosselet...
Series: Geological Society, London, Geology of Series
Published: 01 January 2002
DOI: 10.1144/GOSPP.5
EISBN: 9781862393912
... ; H.m., Howellella mercuri . Trilobites: A.h., Acastella heberti ; A.t., Acastella tiro . Graptolites: Ab., Abiesgraptus sp.; I.t., Istrograptus transgrediens ; N.u., Neocolonograptus ultimus ; L.p., Linograptus posthumus ; M.b., Monograptus bouceki ; M.h., Monograptus hercynicus ; M.m...
Journal Article
Published: 01 March 1971
Journal of the Geological Society (1971) 127 (2): 103–136.
.... See. B. ,16, I- I2. SHAW, R. W. L. 1969. Beyrichiacean ostracodes from the Downtonian of Shropshire. Geol. Fiiren. Stockh. F6rh., 9 x, 52-72. SHERGOLD, J. H. 1967. A revision of Acastella spinosa (Salter I864) with notes on related trilobites. Palaeontology, Lond. xo, 175-88. - - & SmRr~- G J. 1968...
Series: Geological Society, London, Special Publications
Published: 01 January 2007
DOI: 10.1144/SP278.2
EISBN: 9781862395268
... showing a typical Gedinnian aspect from the SW Dra Valley is Howellella ex gr. mercurii ( Gosselet 1880 ) as described by Drot (1964) from the ‘zone à Acastella tiro ’. Trilobites and graptolites Hollard (1963 b ) described a succession of typical Gedinnian Acastella species from...
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Series: Geological Society, London, Special Publications
Published: 01 January 2016
DOI: 10.1144/SP423.11
EISBN: 9781862399556
... ., Acastella ; B ., Belgicaspis ; C. , Caudicriodus ; Eoc ., Eocostapolygnathus ; Fid ., Fidelites ; Fo ., Foordites ; Ling ., Linguipolygnathus ; Mim ., Mimagoniatites ; Now ., Nowakia ; Po ., Polygnathus ; Rhi ., Rhinopteraspis ; War ., Warburgella . Geological setting The Rhenish...
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Series: Geological Society, London, Geology of Series
Published: 01 January 2002
DOI: 10.1144/GOSPP.6
EISBN: 9781862393912
... of the underlying Silurian succession). The Alcolea Fm is 760 m thick, of which about 400 m are basal Devonian (member Al 4). Of the 225 m thick Luesma Fm in the ADRC, only the upper 75 m are Devonian, as shown by the appearance of the first Devonian index trilobite Acastella heberti and conodonts (primitive...