Search Results - "Harper, David A."

Bivalve mollusks in metal pollution studies: From bioaccumulation to biomonitoring by Zuykov, Michael, Pelletier, Emilien, Harper, David A.T.

“…•Bivalve mollusks are good applicable in metal monitoring studies.•No drastic effects of accumulated metals on the health of bivalves were documented.•Shells…”
Get full text

New fossil assemblages from the Early Ordovician Fezouata Biota by Saleh, Farid, Vaucher, Romain, Vidal, Muriel, Hariri, Khadija El, Laibl, Lukáš, Daley, Allison C., Gutiérrez-Marco, Juan Carlos, Candela, Yves, Harper, David A. T., Ortega-Hernández, Javier, Ma, Xiaoya, Rida, Ariba, Vizcaïno, Daniel, Lefebvre, Bertrand

“…The Fezouata Biota (Morocco) is a unique Early Ordovician fossil assemblage. The discovery of this biota revolutionized our understanding of Earth’s early…”
Get full text

Sirius Passet Lagerstatte of North Greenland; a remote window on the Cambrian Explosion by Harper, David A. T, Hammarlund, Emma U, Topper, Timothy P, Nielsen, Arne T, Rasmussen, Jan A, Park, Tae-Yoon S, Smith, M. Paul

“…The lower Cambrian Lagerstatte of Sirius Passet, Peary Land, North Greenland, is one of the oldest of the Phanerozoic exceptionally preserved biotas. The…”
Get full text

STORM-INDUCED COMMUNITY DYNAMICS IN THE FEZOUATA BIOTA (LOWER ORDOVICIAN, MOROCCO) by SALEH, FARID, CANDELA, YVES, HARPER, DAVID A. T, POLECHOVÁ, MARIKA, LEFEBVRE, BERTRAND, PITTET, BERNARD

“…In the Central Anti-Atlas (Morocco), the lower part of the Fezouata Shale has yielded locally abundant remains of soft-bodied to lightly sclerotized taxa,…”
Get full text

Causes of the Cambrian Explosion by Smith, M. Paul, Harper, David A. T.

“…The rapid diversification of animal species in the early Cambrian was the result of a range of interacting biotic and abiotic processes. Many hypotheses have…”
Get full text

Asteroid breakup linked to the Great Ordovician Biodiversification Event by Schmitz, Birger, Harper, David A. T, Peucker-Ehrenbrink, Bernhard, Stouge, Svend, Alwmark, Carl, Cronholm, Anders, Bergström, Stig M, Tassinari, Mario, Xiaofeng, Wang

“…The rise and diversification of shelled invertebrate life in the early Phanerozoic eon occurred in two major stages. During the first stage (termed as the…”
Get full text

Brain and eyes of Kerygmachela reveal protocerebral ancestry of the panarthropod head by Park, Tae-Yoon S., Kihm, Ji-Hoon, Woo, Jusun, Park, Changkun, Lee, Won Young, Smith, M. Paul, Harper, David A. T., Young, Fletcher, Nielsen, Arne T., Vinther, Jakob

“…Recent discoveries of fossil nervous tissue in Cambrian fossils have allowed researchers to trace the origin and evolution of the complex arthropod head and…”
Get full text

Anthropocene: keep communication clear by Edwards, Lucy E., Harper, David A. T., Gibbard, Philip L.

Get full text

Identifying the most surprising victims of mass extinction events: an example using Late Ordovician brachiopods by Finnegan, Seth, Rasmussen, Christian M. Ø., Harper, David A. T.

“…Mass extinction events are recognized by increases in extinction rate and magnitude and, often, by changes in the selectivity of extinction. When considering…”
Get full text

Mass extinctions over the last 500 myr: an astronomical cause? by Erlykin, Anatoly D., Harper, David A. T., Sloan, Terry, Wolfendale, Arnold W., Smith, Andrew

“…A Fourier analysis of the magnitudes and timing of the Phanerozoic mass extinctions (MEs) demonstrates that many of the periodicities claimed in other analyses…”
Get full text

The Irish Ordovician brachiopod fauna: A taxonomic renaissance by Harper, David A.T

“…Despite its small areal extent, the island of Ireland exposes eight Caledonian tectonic terranes; six of them contain Ordovician brachiopod assemblages. These…”
Get full text

Towards a theory of entrepreneurial teams by Harper, David A.

“…This article examines the role of entrepreneurial teams in processes of entrepreneurial discovery. It addresses two main questions. The first investigates the…”
Get full text

The Ordovician System: From overlapping unit stratotypes to Global Boundary Stratotype Sections and Points by Harper, David A.T, Meidla, Tonu, Servais, Thomas

“…Keywords: Ordovician, global stages, thalassocratic, diversifications, extinctions…”
Get full text

A Bradoriid and Brachiopod Dominated Shelly Fauna from the Furongian (Cambrian) of Västergötland, Sweden by Topper, Timothy P, Skovsted, Christian B, Harper, David A. T, Ahlberg, Per

“…A small assemblage of shelly fossils, dominated by the brachiopod Treptotreta jucunda and the bradoriid arthropod Mongolitubulus aspermachaera new species is…”
Get full text

Lower and Middle Ordovician conodonts of Laurentian affinity from blocks of limestone in the Rosroe Formation, South Mayo Trough, western Ireland and their palaeogeographic implication by Stouge, Svend, Harper, David A. T., Sevastopulo, George D., O'Mahony, Darren, Murray, John

“…The Middle Ordovician Rosroe Formation consists of some 1350 m of coarse, mainly siliciclastic to volcaniclastic sedimentary rocks, deposited in a submarine…”
Get full text

Arthroaspis n. gen., a common element of the Sirius Passet Lagerstätte (Cambrian, North Greenland), sheds light on trilobite ancestry by Stein, Martin, Budd, Graham E, Peel, John S, Harper, David A T

“…Exceptionally preserved Palaeozoic faunas have yielded a plethora of trilobite-like arthropods, often referred to as lamellipedians. Among these, Artiopoda is…”
Get full text

No (Cambrian) explosion and no (Ordovician) event: A single long-term radiation in the early Palaeozoic by Servais, Thomas, Cascales-Miñana, Borja, Harper, David A.T., Lefebvre, Bertrand, Munnecke, Axel, Wang, Wenhui, Zhang, Yuandong

“…The Cambrian ‘Explosion’, located by many authors between 540 and 520 million years ago (Ma), is considered to be an abrupt appearance in the fossil record of…”
Get full text

A New Survivor Species of Dicoelosia (Brachiopoda) from Rhuddanian (Silurian) Shallower-Water Biofacies in South China by Huang, Bing, Rong, Jia-Yu, Harper, David A. T

“…The brachiopod genus Dicoelosia is generally considered a typical deep-water taxon. New data suggest that some species of the genus may have invaded relatively…”
Get full text

A suspension-feeding anomalocarid from the Early Cambrian by Vinther, Jakob, Stein, Martin, Longrich, Nicholas R., Harper, David A. T.

“…Tamisiocaris borealis , an Early Cambrian member of the anomalocarids—giant, predatory marine stem arthropods—probably used its frontal appendage to trap…”
Get full text

The palaeogeographical impact on the biodiversity of marine faunas during the Ordovician radiations by Harper, David A.T., Cascales-Miñana, Borja, Kroeck, David M., Servais, Thomas

“…Diversification is a key property of life. Building on John Phillips' (1860) classic, iconic curve, Phanerozoic biodiversity trajectories have been based,…”
Get full text