| DOI: | 10.1016/j.palaeo.2016.01.003
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| 论文题名: | Gastropoda, Tergomya and Paragastropoda (Mollusca) from the Lower Ordovician Fezouata Formation, Morocco |
| 作者: | Ebbestad J.O.R.
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| 刊名: | Palaeogeography, Palaeoclimatology, Palaeoecology
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| ISSN: | 0031-0182
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| 出版年: | 2016
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| 卷: | 460 | | 起始页码: | 87
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| 结束页码: | 96
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| 语种: | 英语
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| 英文关键词: | Carcassonnella
; Gastropoda
; Lesueurilla
; Paragastropoda
; Tergomya
; Thoralispira
|
| 英文摘要: | Gastropoda, Tergomya, and Paragastropoda (GTP) are a small but recognizable part of the collective Fezouata biota from the Lower Ordovician (Tremadocian–Floian) Fezouata Formation in Morocco. GTP range through the sequence but become more abundant and diverse in the stratigraphically higher and shallower marine parts of the succession. About 200 rock samples in existing collections have GTP but usually each slab contains several specimens so the number of individual is many times higher. A total of seven species are recognized of which four were known earlier. Gastropods are represented by the planispiral bellerophontoid Sinuites sp., recognized for the first time in the Tremadocian part of the succession, and the anisostrophic, nearly planispiral Lesueurilla prima (Barrande in Perner). Tergomyans are most abundant, dominated by the genus Carcassonnella with Carcassonnella courtessolei Horný and Peel, Carcassonnella vizcainoi Horný and Peel, and Carcassonnella sp. The latter encompass several specimens from different localities and stratigraphical levels, and may represent one of the named species or new varieties. Carcassonnella is for the first time recorded in the Tremadocian part of the succession. A second tergomyan is Thoralispira laevis (Thoral), while paragastropoda are represented by Pelecyogyra fezouataensis Ebbestad and Lefebvre. In the peri-Gondwana area Carcassonnella, Thoralispira, and Lesueurilla are considered signature taxa, and the Fezouata GTP compare closely with those of Montagne Noire, France, both in composition and distribution. The Bohemian fauna is slightly younger (Floian–Darriwilian) with different species, except for Lesueurilla prima. The latter may have a wider distribution, being tentatively recognized in the Lower Ordovician of Argentina and Spain. © 2016 Elsevier B.V. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/68260
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Museum of Evolution, Uppsala University, Norbyvägen 16, SE 752 36Uppsala, Sweden
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| Recommended Citation: | |
Ebbestad J.O.R.. Gastropoda, Tergomya and Paragastropoda (Mollusca) from the Lower Ordovician Fezouata Formation, Morocco[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,460
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