Life cycle of 70 Ma-old non-marine pennate diatoms

Beraldi-Campesi, Hugo; Mann, David G.; Cevallos-Ferriz, Sergio R.S.

doi:10.1016/j.cretres.2015.07.004

Cited by 8 publications

(7 citation statements)

References 39 publications

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“…In a subsequent study of pennate species in the same deposit, evidence was found for sexual reproduction with many similar features to extant species (Beraldi‐Campesi et al. ).…”

Section: Discussionmentioning

confidence: 77%

“…Recently evidence has been found that many of the features we now see in modern forms were already present in non‐marine pennates from the Late Cretaceous (Beraldi‐Campesi et al. ). In particular, the higher success rate in the production of initial cells in pennates alters the population dynamics and makes it possible to shorten the life cycle.…”

Section: Discussionmentioning

confidence: 93%

“…, Beraldi‐Campesi et al. ). However, the basic designs of the diatom cell and life cycles were already present in the earliest known fossils and are still present today.…”

Section: Discussionmentioning

confidence: 98%

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Diatom life cycles and ecology in the Cretaceous

Jewson

Harwood

2017

Journal of Phycology

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The earliest known diatom fossils with well-preserved siliceous frustules are from Lower Cretaceous neritic marine deposits in Antarctica. In this study, we analyzed the cell wall structure to establish whether their cell and life cycles were similar to modern forms. At least two filamentous species (Basilicostephanus ornatus and Archepyrgus melosiroides) had girdle band structures that functioned during cell division in a similar way to present day Aulacoseira species. Also, size analyses of cell diameter indicated that the cyclic process of size decline and size restoration used to time modern diatom life cycles was present in five species from the Lower Cretaceous (B. ornatus, A. melosiroides, Gladius antiquus, Ancylopyrgus reticulatus, Kreagra forfex) as well as two species from Upper Cretaceous deposits (Trinacria anissimowii and Eunotogramma fueloepi) from the Southwest Pacific. The results indicate that the "Diatom Sex Clock" was present from an early evolutionary stage. Other ecological adaptations included changes in mantle height and coiling. Overall, the results suggest that at least some of the species in these early assemblages are on a direct ancestral line to modern forms.

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“…In a subsequent study of pennate species in the same deposit, evidence was found for sexual reproduction with many similar features to extant species (Beraldi‐Campesi et al. ).…”

Section: Discussionmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 93%

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Diatom life cycles and ecology in the Cretaceous

Jewson

Harwood

2017

Journal of Phycology

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“…In this case, more than 50 types of microfossils, permineralized in silica layers of hydrothermal origin (Rodríguez Ramírez 2011), were deposited in continental basins that were affected by volcanism by the end of the Cretaceous (González-León et al 2011; Figure 1). Microbialites, such as stromatolites and oncolites, are also part of that record (Lucas et al 1995, Beraldi-Campesi et al 2004), as well as some of the oldest known non-marine diatoms (Beraldi-Campesi et al 2015). The description of such microfossil assemblages resulted in the identification of algae, cyanobacteria and benthic and planktonic habits of the different morphospecies, which has enriched the value of this fossil locality.…”

Section: Aquatic Primitive Lifementioning

confidence: 98%

“…Developing comparative studies would allow knowing and discussing unique biological phenomena in the past. For example, understanding how different reproductive strategies and life cycles were established for different organisms, which translate into diverse life forms and adaptations to particular environmental settings, some of which have been preserved (e.g., reproductive/vegetative structures or life cycles; Beraldi-Campesi et al 2015). Through fossils, it is possible to infer how organisms were taking advantage of new ecological conditions that were not present earlier to generate new biodiversity and interactions with other organisms and the surrounding environment, for instance, organisms that evolved mechanisms to store silica inside their cells without using it (such as in algae and cyanobacteria, Riedel & Nelson 1985, Baines et al 2005 and those that incorporated it for their ecological functioning (such as Radiolarians and Diatoms; Thamatrakoln & Hildebrand 2008).…”

Section: Aquatic Primitive Lifementioning

confidence: 99%

Paleobotany to understand evolution and biodiversity in Mexico

Cevallos-Ferriz¹,

Hernández-Damián²,

Beraldi-Campesi³

et al. 2022

Bot. Sci.

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Paleobotany bears an invaluable source of knowledge for understanding the history of the biodiversity that we protect and care for today. This discipline is recognized as a source of information on physical, ecological, and biological events and processes that occurred in the past and are maintained today, but whose occurrences must be interpreted necessarily, and sometimes with limitations, solely from the lithosphere. The importance of studying past life from Mexico and addressing fossil plant reconstruction is highlighted to understand modern biodiversity. Fossils in Mexico have been studied marginally but contain valuable information to understand the history of biodiversity, both in Mexico and globally. We examined the extent to which Mexican fossils can contribute to understanding the origin and development of biological processes through time, and how past plant biodiversity in Mexico compares with the extant one. We used two sources to address these questions: (i) ideas on biological processes as seen through the fossil record, and (ii) fossils known from Mexico. Examples are given of how fossils, morphology, anatomy, and numerical methods, as well as genetics and physiology, illuminate each other to generate solid botanical concepts. The abundant and widely distributed outcrops with fossil plants suggest that further studies on Mexican material will be influential for varied biological hypotheses related to the origin and history of biodiversity. Mexican fossil plants and their scarce sampled localities are open to further investigation that will complement hypotheses on the historic discussion of biological processes.

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Diatom Sexual Reproduction and Life Cycles

Poulíčková

Mann

2019

Diatoms: Fundamentals and Applications

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Life cycle of 70 Ma-old non-marine pennate diatoms

Cited by 8 publications

References 39 publications

Diatom life cycles and ecology in the Cretaceous

Diatom life cycles and ecology in the Cretaceous

Paleobotany to understand evolution and biodiversity in Mexico

Diatom Sexual Reproduction and Life Cycles

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