A tiger by the tail: The exophragm of the Cretaceous‐Paleocene Dinoflagellate<i>Palaeoperidinium</i>and its implications

Evitt, William R.; Damassa, Sarah Pierce; Albert, Nairn R.

doi:10.1080/01916122.1998.9989501

Cited by 21 publications

(23 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Trithyrodinium evittii is considered to be a warm-water indicator, being common in low latitudes in the latest Cretaceous and migrating to high latitudes during an interval of global warming in the earliest Paleocene Dam, 1997, 1999;Brinkhuis et al, 1998;Willumsen, 2003;Vellekoop et al, 2015). This is consistent with the first T. evittii acme Abundant Palaeoperidinium pyrophorum has been interpreted to represent a wide range of environments from fully marine to restricted marine stressed conditions with low salinity and extreme pH-values (Evitt et al, 1998;Askin, 1988;Habib et al, 1994). Acmes have been reported in a neritic setting of Seymour Island (Askin, 1988) as well as in pelagic sediments from the Viborg-1 corehole, onshore Denmark (Heilmann-Clausen, 1985).…”

Section: Paleoenvironmental Significance Of Dinoflagellate Cyst Acmessupporting

confidence: 58%

See 1 more Smart Citation

South Pacific evidence for the long-term climate impact of the Cretaceous/Paleogene boundary event

Taylor

Willumsen

Hollis

et al. 2018

Earth-Science Reviews

View full text Add to dashboard Cite

The Cretaceous/Paleogene (K/Pg) boundary is well-represented across a range of depositional settings in New Zealand. Trends in fossil assemblages and marine lithofacies indicate that the K/Pg event was followed by a pronounced and long-term (~1 Myr) perturbation in climate and ocean conditions. These findings are supported by a TEX86derived sea surface temperature (SST) reconstruction across the K/Pg boundary at mid-Waipara River, north Canterbury. The BAYSPAR calibration indicates that SST was very stable in the uppermost Cretaceous (~20°C), but abruptly warmed by ~4°C in a 25 cm-thick lowermost Paleocene interval. This interval is overlain by a ~2 m thick interval in which SST abruptly cooled by ~10°C and then progressively returned to ~20°C. The basal Paleocene warm interval is associated with an acme in the dinoflagellate species Trithyrodinium evittii and the succeeding cool interval is associated with an acme in Palaeoperidinium pyrophorum. Biostratigraphic correlation of the shelfal mid-Waipara section to the pelagic K/Pg sections in Marlborough reveals that a significant unconformity separates these two acme events, with the T acme event occurring in the earliest Paleocene and the P. pyrophorum acme occurring ~1 Myr later and lasting ~200 kyr. A succession of dinoflagellate acme events within the intervening interval in the Marlborough sections implies unstable climatic and environmental conditions in the lead up to the P. pyrophorum acme and cooling event at ~65 Ma. This event also coincides with a peak in biogenic silica accumulation in the Marlborough sections. We suggest that disruption to biogeochemical pathways at the K/Pg boundary caused long-term climatic cooling in the southern Pacific region.

show abstract

Section: Paleoenvironmental Significance Of Dinoflagellate Cyst Acmessupporting

confidence: 58%

“…5C). Both species are inferred to be heterotrophic peridinioids, which have been associated with various types of nutrient-rich settings and salinities (Dale, 1996;Askin, 1988;Habib et al, 1994;Evitt et al, 1998;Sluijs et al, 2005).…”

Section: Palynological Indications Of Environmental Changementioning

confidence: 99%

South Pacific evidence for the long-term climate impact of the Cretaceous/Paleogene boundary event

Taylor

Willumsen

Hollis

et al. 2018

Earth-Science Reviews

View full text Add to dashboard Cite

show abstract

“…Finally, and although somewhat different in nature, the inside surface of the extra‐thecal wall of Palaeoperidinium pyrophorum was elegantly shown to reflect the morphology of the parent dinoflagellate theca around which the wall formed by Evitt et al . ().…”

Section: The Dinoflagellate Life Cycle and Fossil Recordmentioning

confidence: 97%

Unique preservation of siliceous dinoflagellate motile cells from the Oligocene fossil Lagerstätte of Sieblos, Germany

Harding

2019

Palaeontology

View full text Add to dashboard Cite

The Triassic to Recent fossil record of the dinoflagellates is represented overwhelmingly by geologically resistant, organic‐walled, non‐motile resting cysts; such cysts are formed following the sexual phase in the life cycle. Very few confirmed records exist of the motile stage being preserved in the fossil record. This paper reports the occurrence of two very unusual dinoflagellate taphofacies, one developed in bituminous shales and the other in micrites, from the Oligocene fossil Lagerstätte at Sieblos, Hesse, Germany. A new dinoflagellate taxon, Sieblososphaera martini sp. nov. has been identified through analysis of dissociated skeletal elements in the bituminous shales and external moulds and casts in the micrites. The unique preservation of these fossils confirms them not only as primary biogenically silicified motile thecate cells, but also indicates that there was a much greater range of tabulation present within the subfamily Lithoperidiniaceae than has hitherto been recognized.

show abstract

“…Fensome et al, 1996;Moldowan & Talyzina, 1998;Saldarriaga et al, 2004). However, the discovery of extra-thecal cysts of the dinoflagellate Palaeoperidinium (Evitt et al, 1998) and the 'dinocasts' of illustrate that the fossil record will continue to divulge oddities.…”

Section: Taxonomy Morphological Problems and Evolution: The Gene Geniementioning

confidence: 99%

Celebrating 25 years of advances in micropalaeontology: a review

Gregory¹,

Armstrong

Boomer

et al. 2006

J. Micropalaeontol.

View full text Add to dashboard Cite

INTRODUCTION (F. JOHN GREGORY)To commemorate the publication of the 25 th Volume of the Journal of Micropalaeontology, the first issue of which came out in 1982, this celebratory review article was commissioned. Officers of each TMS Group (Ostracod, Foraminifera, Palynology, Nannofossil, Microvertebrate and Silicofossil) were requested to reflect over the last 25 years and assess the major advances and innovations in each of their disciplines. It is obvious from the presentations that all Groups report that research has moved on from the basic, but essential descriptive phase, i.e. taxonomy and establishing biostratigraphies, to the utilization of new technologies and application to issues of the day such as climate change and global warming. However, we must not lose sight of the fact that the foundation of micropalaeontology is observation and the building block for all these new and exciting innovations and developments is still good taxonomy. Briefly, the most obvious conclusion that can be drawn from this review is that micropalaeontology as a science is in relatively good health, but we have to ensure that the reported advancements will sustain and progress our discipline. There is one issue that has not really been highlighted in these contributions -we need to make sure that there are enough people being trained in micropalaeontology to maintain development. The last 25 years has seen a dramatic decrease in the number of post-graduate MSc courses in micropalaeontology. For example, in the UK, in the 1980s and early 1990s there were five specific MSc courses to choose from (Hull, Southampton, Sheffield, Aberystwyth and UCL) now there is just one left, run jointly by UCL and the Natural History Museum, in London. This decrease occurred for a variety of reasons but was related initially to fluctuations in oil price, leading to a lack of stability and confidence in the oil industry which used to attract many postgraduates. Fortunately, there has been a recent trend to try and bolster student numbers with the introduction of multidisciplinary postgraduate courses which include an element of micropalaeontology, and there are more students entering the subject through PhD programmes than in the past.

show abstract

A tiger by the tail: The exophragm of the Cretaceous‐Paleocene DinoflagellatePalaeoperidiniumand its implications

Cited by 21 publications

References 8 publications

South Pacific evidence for the long-term climate impact of the Cretaceous/Paleogene boundary event

South Pacific evidence for the long-term climate impact of the Cretaceous/Paleogene boundary event

Unique preservation of siliceous dinoflagellate motile cells from the Oligocene fossil Lagerstätte of Sieblos, Germany

Celebrating 25 years of advances in micropalaeontology: a review

Contact Info

Product

Resources

About