Ordovician chitinozoans from the Arctic Platform and the Franklinian miogeosyncline in northern Canada

Achab, A.; Asselin, Esther

doi:10.1016/0034-6667(94)00099-6

Cited by 18 publications

(5 citation statements)

References 25 publications

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“…Occurrence : Global distribution: Lagenochitina pirum (Achab, 1982) [ 42 ] has been described from the Early Ordovician in Euramerica by Achab and Achab and Asselin [ 42 , 46 , 52 , 53 ], and from the middle Ordovician in Eastern Gondwana by Chen et al and Tang et al [ 48 , 50 , 51 ]. There are no previous records of this species in the Silurian or the Devonian.…”

Section: Resultsmentioning

confidence: 99%

A new chitinozoan assemblage from the Middle Devonian Los Monos Formation (sub-Andean basin, southern Bolivia) and its biozonal implications for Western Gondwana

Camina,

Rubinstein,

Butcher

et al. 2024

PLoS ONE

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Chitinozoans recovered from one section of the Middle Devonian Los Monos Formation in the TCB X-1001-Tacobo borehole, sub-Andean basin of Bolivia, have been analysed. Eleven from the eighteen processed cutting samples yielded specimens that allowed taxonomic study. Eleven genera and thirty-five chitinozoan species were identified from the Los Monos Formation with four of them recorded for the first time in Western Gondwana. Ancyrochitina biconstricta, Ancyrochitina parisi, Angochitina galarzae and Ramochitina boliviensis are among the most relevant taxa restricted to Western Gondwana that support the affinity with this paleocontinent. One new species, Lagenochitina tacobensis sp. nov. is described, and Ramochitina candelariaensis sp. nov. (n. n.) is formally erected. The chitinozoan assemblage reinforces the late Eifelian–middle Givetian age previously proposed by organic-walled phytoplankton and miospores for this section of the TCB X-1001-Tacobo borehole. A new local chitinozoan biozonation based on the chitinozoan assemblages is proposed and a revision of the current chitinozoan biozonation for Western Gondwana and Bolivia is recommended.

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Section: Resultsmentioning

confidence: 99%

A new chitinozoan assemblage from the Middle Devonian Los Monos Formation (sub-Andean basin, southern Bolivia) and its biozonal implications for Western Gondwana

Camina,

Rubinstein,

Butcher

et al. 2024

PLoS ONE

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“…The spiny ornamentation which characterizes all Belonechitina species was the main character proposed by Eisenack (1931) Previous stratigraphic record: Ordovician of northeast Libya (Molyneux & Paris 1985); Llanvirn-Caradoc of Canada (Achab & Asselin 1995) and Scandinavia (Grahn & Nõlvak 2007); Arenig-Caradoc of Saudi Arabia (Al-Hajri 1995); Caradoc of USA (Siesser et al 1998 fig. 2 (e, f).…”

Section: Remarks and Comparisonmentioning

confidence: 97%

Palynology of the Middle Ordovician Hawaz Formation in the Murzuq Basin, south-west Libya

Abuhmida

Wellman

2017

Palynology

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Twenty nine core and seven cuttings samples were collected from two boreholes penetrating the Middle Ordovician Hawaz Formation in the Murzuq Basin, southwest Libya. The samples were palynologically analysed in order to determine age and depositional environment. The palynological assemblages contain abundant sphaeromorphs, rare but diverse acritarchs, rare chitinozoans, and relatively abundant cryptospores. A total of 26 acritarch species, five chitinozoan species and 17 cryptospore species have been identified. The acritarch and chitinozoan assemblages provide biostratigraphical age dating and indicate that the Hawaz Formation is Mid Ordovician and most likely mid Darriwilian (Llanvirn) in age. The cryptospore assemblage is typical of those from the Mid Ordovician-earliest Silurian and does not permit further age refinement. Based on palynofacies analysis the depositional environment of the Hawaz Formation is interpreted as shallowing upward from nearshore marine inner shelf to marginal marine. The cryptospores provide rare evidence for Middle Ordovician terrestrial vegetation at this very early stage in its development.

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“…nov. (Plate 4, figures 3, 7; 4, 8). Tanuchitina anticostiensis has been recorded from the Upper Ordovician elsewhere, including Canada (Achab 1977; Achab and Asselin 1995), Libya (Molyneux and Paris 1985), Iran (Ghavidel-Syooki 2001, 2017; Ghavidel-Syooki and Borji 2018), and Turkey (Paris et al 2007). Likewise, Hercochitina cf.…”

Section: Biostratigraphy Of the Chitinozoan Faunasmentioning

confidence: 99%

“…nov. (Plate 4,figures 3,7;4,8). Tanuchitina anticostiensis has been recorded from the Upper Ordovician elsewhere, including Canada (Achab 1977;Achab and Asselin 1995), Libya (Molyneux and Paris 1985), Iran 3 Plate 8. Figures 1, 5; 2, 6.…”

Section: Ancyrochitina Merga Biozonementioning

confidence: 99%

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Biostratigraphy and palaeogeographic implications of Ordovician and Silurian chitinozoa from the High Zagros Mountains, Northern Persian Gulf, Iran

Ghavidel‐Syooki

2022

Palynology

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A siliciclastic succession is exposed at the Faraghan mountain, northern Persian Gulf, southeastern Iran. A detailed, high-resolution palynological analysis was performed on the Zardkuh, Seyahou, Dargaz, and Sarchahan formations to verify the exact age and palaeogeographic position of the High Zagros Mountains. Two hundred surface samples from this succession were collected and analysed. Most samples yielded abundant and well-preserved chitinozoans, acritarchs, scolecodonts, and cryptospores. Fifty-three chitinozoan species (21 genera) were identified that permitted to establish the

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Ordovician chitinozoans from the Arctic Platform and the Franklinian miogeosyncline in northern Canada

Cited by 18 publications

References 25 publications

A new chitinozoan assemblage from the Middle Devonian Los Monos Formation (sub-Andean basin, southern Bolivia) and its biozonal implications for Western Gondwana

A new chitinozoan assemblage from the Middle Devonian Los Monos Formation (sub-Andean basin, southern Bolivia) and its biozonal implications for Western Gondwana

Palynology of the Middle Ordovician Hawaz Formation in the Murzuq Basin, south-west Libya

Biostratigraphy and palaeogeographic implications of Ordovician and Silurian chitinozoa from the High Zagros Mountains, Northern Persian Gulf, Iran

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