Draconisella mortoni sp. nov., a Mizzia-like Dasycladalean alga from the Lower Cretaceous of Oman

Granier, Bruno; Lethiers, Alexandre

doi:10.26879/743

Cited by 2 publications

(1 citation statement)

References 14 publications

(27 reference statements)

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“…As for previous 3D reconstructions of algae (Granier, 2010;Granier and Sander, 2013;Granier and Lethiers, 2017), the Blender free software was used to build 3D models of C. sulcata. The models presented here focus 1) on the morphology of the fertile laterals ( Figure 13) and 2) on the arrangement of the verticils, both sterile (represented by scars) and fertile, along the main axis ( Figure 14).…”

Section: Type Species Actinoporella Sulcatamentioning

confidence: 99%

Aloisalthella, a new genus of fossil Polyphysacean green algae (Chlorophyta, Dasycladales), with notes on the genus Clypeina (Michelin, 1845)

Granier¹,

Lethiers

2019

Palaeontol Electron

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Following a preliminary historical survey of the Cenozoic Clypeina marginoporella Michelin, 1845, which is the type species of the respective genus, and of the Mesozoic Clypeina sulcata (Alth, 1882), the point was made that these two species may not be ascribed to the same genus. Accordingly, the new genus Aloisalthella is introduced with Clypeina sulcata as type-species. In addition, the generic diagnosis of Clypeina is amended (i.e., shortened) in order to exclude all features that are not present in its type, e.g., there are no verticils of sterile laterals inserted between successive verticils of fertile laterals. A rather large collection of algae was used to illustrate some key characteristics of these algal taxa as well as a few features rarely observed in C. sulcata.

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Section: Type Species Actinoporella Sulcatamentioning

confidence: 99%

Aloisalthella, a new genus of fossil Polyphysacean green algae (Chlorophyta, Dasycladales), with notes on the genus Clypeina (Michelin, 1845)

Granier¹,

Lethiers

2019

Palaeontol Electron

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Parurgonina Valanginiana N. Sp. From the Valanginian of Sw Iran (Zagros Zone): The First Cretaceous Record of the Genus

SCHLAGINTWEIT,

YAZDI-MOGHADAM,

GRANIER

et al. 2023

Actapalrom

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The new larger benthic foraminifer Parurgonina valanginiana is described from the Valanginian deposits of the Fahliyan Formation of southwestern Iran (Zagros Zone). It is separated from the uppermost Oxfordian-lowermost Tithonian generotype P. caelinensis (Cuvillier et al.) by a distinct time gap. The Lower Cretaceous specimens exhibit a larger embryonic chamber whereas the internal structural and other biometric data are generally in conformity with the Upper Jurassic morphotypes. Besides the Middle Jurassic P. primaeva Kamoun & Peybernès and the Upper Jurassic P. caelinensis, P. valanginiana sp. nov. represents the third species of the genus described and possibly a Valanginian marker endemic for the Arabian Plate. In the Fahliyan Formation, P. valanginiana sp. nov. occurs in wackestones associated with Pseudocyclammina lituus (Yokoyama). Additional data for the micropalaeontological assemblages (benthic foraminifera, calcareous algae) of the shallow-water carbonates of the Fahliyan Formation are provided. As it is also the case in the United Arab Emirates (Granier, 2008), it is proposed that the Tithonian/Berriasian boundary does not, as generally indicated in the literature, coincide with the boundary of the Hith Formation and the Fahliyan Formation, but instead occurs within the latter. The new finds provide further evidence that the Tithonian/Berriasian boundary did not represent a major rupture or extinction for larger benthic foraminifera. On the contrary, the Berriasian/Valanginian boundary corresponds to a natural discontinuity (both sedimentological and biological) possibly enhanced by a hiatus of the upper Berriasian strata. The foraminiferal diversity remains quite high during early Valanginian times then falls drastically, which suggests that the Berriasian/Valanginian crisis is a double barelled crisis (first base Valanginian, second intra-Valanginian).

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Draconisella mortoni sp. nov., a Mizzia-like Dasycladalean alga from the Lower Cretaceous of Oman

Cited by 2 publications

References 14 publications

Aloisalthella, a new genus of fossil Polyphysacean green algae (Chlorophyta, Dasycladales), with notes on the genus Clypeina (Michelin, 1845)

Aloisalthella, a new genus of fossil Polyphysacean green algae (Chlorophyta, Dasycladales), with notes on the genus Clypeina (Michelin, 1845)

Parurgonina Valanginiana N. Sp. From the Valanginian of Sw Iran (Zagros Zone): The First Cretaceous Record of the Genus

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