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Dactylioceras

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Journal Article

Did Dactylioceras eat fish?

Christopher R. C. Paul
Published: 15 April 2014
Proceedings of the Yorkshire Geological Society (2014) 60 (1): 9–17.
DOI: https://doi.org/10.1144/pygs2014-339
...Christopher R. C. Paul Summary Ammonites that preserve evidence of their soft anatomy or gut contents are exceedingly rare. An example of the Toarcian ammonite, Dactylioceras , with tightly packed fish scales in the supposed position of the stomach, plus further scales and three articulated fish...
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Damaged specimens of <span class="search-highlight">Dactylioceras</span> from Saltwick Bay, near Whitby, North ...

Damaged specimens of Dactylioceras from Saltwick Bay, near Whitby, North ...

Published: 31 March 2015
Fig. 1. Damaged specimens of Dactylioceras from Saltwick Bay, near Whitby, North Yorkshire. ( A ) Left lateral view of YORYM 2014.353. ( B ) Close-up of the damaged area in (A). ( C ) Right lateral view of YORYM 2014.354. ( D ) Close up of the damaged area in C. Scale bar in B = 20 mm
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<span class="search-highlight">Dactylioceras</span> sp. with fish debris preserved in the body-chamber (LYMPH 20...

Dactylioceras sp. with fish debris preserved in the body-chamber (LYMPH 20...

Published: 15 April 2014
Fig. 1. Dactylioceras sp. with fish debris preserved in the body-chamber (LYMPH 2013/82). ( A ) External view to show typical ornament and damaged areas with fish debris (white arrows). LS position of last suture. ( B ) Polished median section showing fill of chambers and body-chamber: a, area
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<span class="search-highlight">Dactylioceras</span> sp. (LYMPH 2013&#x2F;82). ( A ) Detail of the 5th chamber back fr...

Dactylioceras sp. (LYMPH 2013/82). ( A ) Detail of the 5th chamber back fr...

Published: 15 April 2014
Fig. 2. Dactylioceras sp. (LYMPH 2013/82). ( A ) Detail of the 5th chamber back from the last septum to show complex diagenetic calcite fill and slight damage to the 5th and 6th septa (arrowed). Note neomorphic spar (n) replacement of the shell (below). ( B ) Detail of the third chamber back
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<span class="search-highlight">Dactylioceras</span> sp. (LYMPH 2013&#x2F;82). Detail of external surface to show dama...

Dactylioceras sp. (LYMPH 2013/82). Detail of external surface to show dama...

Published: 15 April 2014
Fig. 3. Dactylioceras sp. (LYMPH 2013/82). Detail of external surface to show damage revealing layering in the original shell (centre). Speckling in the lower centre and mid right is fine-grained pyrite within the internal fill of the body-chamber. Scale bar = 2 mm. Dorsal margin below.
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<span class="search-highlight">Dactylioceras</span> sp. (LYMPH 2013&#x2F;82). Detail of supposed cavities in body-cha...

Dactylioceras sp. (LYMPH 2013/82). Detail of supposed cavities in body-cha...

Published: 15 April 2014
Fig. 4. Dactylioceras sp. (LYMPH 2013/82). Detail of supposed cavities in body-chamber now filled with diagenetic calcite. ( A ) Posterior area adjacent to the last septum (a, left) and first thin area adjacent to the dorsal margin of the body-chamber (d1, above). ( B ) Second thin area
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<span class="search-highlight">Dactylioceras</span> sp. (LYMPH 2013&#x2F;82). Detail of the posterior damaged area sh...

Dactylioceras sp. (LYMPH 2013/82). Detail of the posterior damaged area sh...

Published: 15 April 2014
Fig. 5. Dactylioceras sp. (LYMPH 2013/82). Detail of the posterior damaged area showing abundant fish scales predominantly towards the dorsal margin of the body-chamber (above). Note the growth lines on the external surfaces of the largely undamaged fish scales and the lower left area in which
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<span class="search-highlight">Dactylioceras</span> sp. (LYMPH 2013&#x2F;82). Stereophotos of the anterior portion of...

Dactylioceras sp. (LYMPH 2013/82). Stereophotos of the anterior portion of...

Published: 15 April 2014
Fig. 6. Dactylioceras sp. (LYMPH 2013/82). Stereophotos of the anterior portion of the posterior damaged area to show the oblique, sharp boundary between sediment with virtually no fish scales (below left) and the region packed with abundant fish scales. Dorsal is above and anterior to the left
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<span class="search-highlight">Dactylioceras</span> sp. (LYMPH 2013&#x2F;82). Detail of the anterior damaged area to ...

Dactylioceras sp. (LYMPH 2013/82). Detail of the anterior damaged area to ...

Published: 15 April 2014
Fig. 7. Dactylioceras sp. (LYMPH 2013/82). Detail of the anterior damaged area to show three aligned fish vertebrae. Note the growth lines on the fish scales to the left. Dorsal is to the left and anterior below. Scale bar = 1 mm.
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The ammonite <span class="search-highlight">Dactylioceras</span> cf. athleticum with attached brachiopod, Di...

The ammonite Dactylioceras cf. athleticum with attached brachiopod, Di...

Published: 01 November 2012
Fig. 4. The ammonite Dactylioceras cf. athleticum with attached brachiopod, Discinisca infraoolithica LYMPH 2011/78. (A) General view of the left side of the ammonite to show the position of the brachiopod. (B) , (C) and (D) plan, profile and anterior views of the internal mould
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Figure 2. Details of geochemical changes in the upper <span class="search-highlight">Dactylioceras</span> semice...

Figure 2. Details of geochemical changes in the upper Dactylioceras semice...

Published: 01 March 2008
Figure 2. Details of geochemical changes in the upper Dactylioceras semicelatum and Cleviceras exaratum ammonite subzones, data sources as Figure 1 . The four abrupt shifts in δ 13 C org are labeled A–D ( Kemp et al., 2005 ; Kemp, 2006 ) and their stratigraphic positions are indicated
Journal Article

Bitten ammonites from the upper Lias Group (Lower Jurassic) of Saltwick Bay, Whitby, North Yorkshire, UK

Richard Maddra
Published: 31 March 2015
Proceedings of the Yorkshire Geological Society (2015) 60 (3): 153–156.
DOI: https://doi.org/10.1144/pygs2015-346
...Fig. 1. Damaged specimens of Dactylioceras from Saltwick Bay, near Whitby, North Yorkshire. ( A ) Left lateral view of YORYM 2014.353. ( B ) Close-up of the damaged area in (A). ( C ) Right lateral view of YORYM 2014.354. ( D ) Close up of the damaged area in C. Scale bar in B = 20 mm...
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THE TOARCIAN ZONAL SCALE IN NORTHERN SIBERIA

S. V. Meledina
Published: 01 July 2000
Russ. Geol. Geophys. (2000) 41 (7): 920–928.
... Zone. Knyazev, Kutygin, and Meledina [ 30 ] suggested that the initial Dactylioceras commune and Zugodactylites braunianus Zones ( Fig. 1 ) should be restored for the following reasons: (1) The species Zugodactylites braunianus (Orb.) is not used in the standard scale as a subzonal index...
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ICHNOFABRIC EVIDENCE FOR THE LACK OF BOTTOM ANOXIA DURING THE LOWER TOARCIAN OCEANIC ANOXIC EVENT IN THE FUENTE DE LA VIDRIERA SECTION, BETIC CORDILLERA, SPAIN

FRANCISCO J. RODRÍGUEZ-TOVAR, ALFRED UCHMAN
Journal: PALAIOS
Published: 01 September 2010
PALAIOS (2010) 25 (9): 576–587.
DOI: https://doi.org/10.2110/palo.2009.p09-153r
..., sedimentation type, and organic matter flux during the Ypresian-Lutetian transition (early-middle Eocene) ( Ortiz et al., 2008 ). Here we present a detailed ichnological analysis on the trace-fossil distribution and abundance and ichnofabrics of the lower Toarcian ( Dactylioceras polymorphum...
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A new scenario for the Domerian - Toarcian transition

Alain Morard, Jean Guex, Annachiara Bartolini, Elena Morettini, Patrick de Wever
Published: 01 July 2003
Bulletin de la Société Géologique de France (2003) 174 (4): 351–356.
DOI: https://doi.org/10.2113/174.4.351
... d’Harpoceratinae ( Lioceratoides , Neolioceratoides ), accompagnée ensuite de Dactylioceras particuliers (groupe mirabile - polymorphum = sous-genre Eodactylites ), fait presque totalement défaut en Europe du Nord-Ouest, alors qu’elle abonde dans les dernières alternances marno-calcaires, sans changement...
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The linguliform brachiopod Discinisca in the Lower Jurassic Charmouth Mudstone Formation of Dorset and Alum Shale Member of Yorkshire

Chris Andrew, Paddy Howe, Christopher R.C. Paul
Published: 01 November 2012
Proceedings of the Yorkshire Geological Society (2012) 59 (2): 125–132.
DOI: https://doi.org/10.1144/pygs2012-314
...Fig. 4. The ammonite Dactylioceras cf. athleticum with attached brachiopod, Discinisca infraoolithica LYMPH 2011/78. (A) General view of the left side of the ammonite to show the position of the brachiopod. (B) , (C) and (D) plan, profile and anterior views of the internal mould...
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A palynological investigation of the Lower and lowermost Middle Jurassic strata (Sinemurian to Aalenian) from North Yorkshire, UK

Raffaella Bucefalo Palliani, James B. Riding
Published: 01 May 2000
Proceedings of the Yorkshire Geological Society (2000) 53 (1): 1–16.
DOI: https://doi.org/10.1144/pygs.53.1.1
... to the Dactylioceras tenuicostatum-Harpoceras falciferum Ammonite zonal transition in the Lower Toarcian was caused by the spread of widespread marine anoxia during the Lower Toarcian maximum flooding event. A new species of dinoflagellate cyst, Nannoceratopsis symmetrica , is described. Fig. 2. Lithological log...
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An ammonite zonation for the Toarcian (Lower Jurassic) of the North American Cordillera

Giselle K. Jakobs, Paul L. Smith, Howard W. Tipper
Published: 01 June 1994
Canadian Journal of Earth Sciences (1994) 31 (6): 919–942.
DOI: https://doi.org/10.1139/e94-083
... boundary of the Toarcian is drawn at the first appearance of Dactylioceras above the last occurrence of Amaltheus and Fanninoceras . The lower Toarcian is represented by the Kanense Zone; the middle Toarcian by the Planulata and Crassicosta zones; and the upper Toarcian by the Hillebrandti and Yakounensis...
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New Lower Jurassic ammonite faunas from the Fernie Formation, southern Canadian Rocky Mountains

Russell L. Hall
Published: 01 August 1987
Canadian Journal of Earth Sciences (1987) 24 (8): 1688–1704.
DOI: https://doi.org/10.1139/e87-162
... occur together with Protogrammoceras and ? Aveyroniceras . In the basal parts of the overlying Poker Chip Shale a fauna including Harpoceras cf. falciferum , Harpoceratoides , Polyplectus cf. subplanatus , Hildaites cf. serpentiniformis , and Dactylioceras cf. athleticum is correlated with the lower...
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Pliensbachian Ammonoids from British Columbia and southern Yukon

Hans Frebold
Published: 01 April 1970
Canadian Journal of Earth Sciences (1970) 7 (2): 435–456.
DOI: https://doi.org/10.1139/e70-037
...Hans Frebold Abstract Pliensbachian ammonite faunas recorded from British Columbia and southern Yukon contain Crucilobiceras , Phricodoceras , Uptonia , Platypleuroceras ?, Acanthopleuroceras , Tropidoceras , Becheiceras , Amaltheus , Pleuroceras ?, Prodactylioceras , Dactylioceras ?, Arieticeras...
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