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- Publications
- Influence
RESISTANCE OF SPIDERS TO CRETACEOUS‐TERTIARY EXTINCTION EVENTS
- D. Penney, C. Wheater, P. Selden
- Biology, Medicine
- Evolution; international journal of organic…
- 1 November 2003
Abstract Throughout Earth history a small number of global catastrophic events leading to biotic crises have caused mass extinctions. Here, using a technique that combines taxonomic and numerical… Expand
Fossil spiders
Over the last three decades, the fossil record of spiders has increased from being previously biased towards Tertiary ambers and a few dubious earlier records, to one which reveals a much greater… Expand
Oldest true orb-weaving spider (Araneae: Araneidae)
The aerial orb web woven by spiders of the family Araneidae typifies these organisms to laypersons and scientists alike. Here we describe the oldest fossil species of this family, which is preserved… Expand
First fossil Huttoniidae (Arthropoda: Chelicerata: Araneae) in late Cretaceous Canadian amber
The first fossils of the extant New Zealand spider family Huttoniidae are described from Cretaceous (Campanian) amber from Alberta and Manitoba, Canada. The specimens are juveniles and poorly… Expand
Studies on the endocrine control of metabolism in Leucophaea maderae (Blattaria): I. The hemolymph proteins during egg maturation
- F. Engelmann, D. Penney
- Biology
- 1 October 1966
Abstract During egg maturation, particularly in its later phase, the blood protein concentration dropped to approximately half the original level. In the course of pregnancy it slowly rose again. A… Expand
Portal Vein Thrombosis: An Unusual Complication of Laparoscopic Cholecystectomy
- O. Preventza, F. A. Habib, S. Young, D. Penney, W. Oppat, V. Mittal
- Medicine
- JSLS : Journal of the Society of Laparoendoscopic…
- 2005
Background: Complications following laparoscopic cholecystectomy are encountered infrequently due to increasing proficiency in laparoscopic surgery. The occurrence of portal venous thrombosis… Expand
Genetic variation in a tropical tree species influences the associated epiphytic plant and invertebrate communities in a complex forest ecosystem
- S. E. Zytynska, M. Fay, D. Penney, R. Preziosi
- Biology, Medicine
- Philosophical Transactions of the Royal Society B…
- 12 May 2011
Genetic differences among tree species, their hybrids and within tree species are known to influence associated ecological communities and ecosystem processes in areas of limited species diversity.… Expand
Anaerobic glycolysis and lactic acid accumulation in cold submergedRana pipiens
- J. Christiansen, D. Penney
- Biology
- Journal of comparative physiology
- 1 September 1973
SummaryWinter frogs acclimated to 5 °C for 2–8 weeks were submerged in deoxygenated water at 5 °C.2.Under these anoxic conditions survival time as judged by persistence of cardiac activity was in… Expand
Ancient Ephemeroptera–Collembola Symbiosis Fossilized in Amber Predicts Contemporary Phoretic Associations
- D. Penney, A. McNeil, +4 authors R. Preziosi
- Biology, Medicine
- PloS one
- 17 October 2012
X-ray computed tomography is used to identify a unique example of fossilized phoresy in 16 million-year-old Miocene Dominican amber involving a springtail being transported by a mayfly. It represents… Expand
Summary statistics for fossil spider species taxonomy
- D. Penney, J. Dunlop, Y. Marusik
- Biology, Medicine
- ZooKeys
- 8 May 2012
Abstract Spiders (Araneae) are one of the most species-rich orders on Earth today, and also have one of the longest geological records of any terrestrial animal groups, as demonstrated by their… Expand