Helen E. Ryan

ORCID: 0000-0002-4748-4191
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About
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Research Areas
  • Paleontology and Evolutionary Biology
  • Ichthyology and Marine Biology
  • Fish Biology and Ecology Studies
  • Geological and Geophysical Studies
  • Paleontology and Stratigraphy of Fossils
  • Geology and Paleoclimatology Research
  • Pleistocene-Era Hominins and Archaeology
  • Plant-Derived Bioactive Compounds
  • Seedling growth and survival studies
  • Mollusks and Parasites Studies
  • Evolution and Paleontology Studies
  • Morphological variations and asymmetry
  • Menstrual Health and Disorders
  • Terrorism, Counterterrorism, and Political Violence
  • Forest Insect Ecology and Management
  • Geochemistry and Geologic Mapping
  • Archaeology and ancient environmental studies
  • Forensic Anthropology and Bioarchaeology Studies

Australian Museum
2015-2023

Western Australian Museum
2015-2023

University of Dundee
1994

University College Cork
1988

(1988). Fanaticism, political suicide and terrorism. Terrorism: Vol. 11, No. 2, pp. 91-111.

10.1080/10576108808435703 article IT Terrorism 1988-01-01

Twenty-eight women performed two demanding sustained attention tasks in the premenstrual and intermenstrual phases of menstrual cycle. Mood was assessed before after performance. No effects phase were found on perceptual sensitivity response criterion, but time less slower phase. There no pre-task mood, following performance, lower energy pleasantness mood. Moods varied with irrespective usage contraceptive pill, stronger non-pill users. Performance data suggest that speed visual...

10.1080/00140139408964918 article EN Ergonomics 1994-08-01

Abstract The latest early Campanian archipelago deposits of the Kristianstad Basin, southern Sweden, yield one most diverse Cretaceous chondrichthyan faunas collected from a narrow stratigraphical interval. Building on previous descriptions various selachians, squatiniform and synechodontiform sharks are added to faunal list. Squatinidae is represented by Squatina ( ) lundegreni sp. nov. fortemordeo poorly preserved type specimens nominal hassei Maastrichtian Netherlands were recently...

10.1144/sp434.9 article EN Geological Society London Special Publications 2015-12-16

10.1080/03115518.2024.2347595 article EN Alcheringa An Australasian Journal of Palaeontology 2024-04-02

Abstract Ancient protein studies have demonstrated their utility for looking at a wide range of evolutionary and historical questions. The majority palaeoproteomics to date been restricted high latitudes with relatively temperate environments. A better understanding preservation lower is critical disentangling the mechanisms involved in deep-time survival ancient proteins, broadening geographical applicability palaeoproteomics. In this study, we aim assess level collagen Australian fossil...

10.1038/s43247-023-01114-8 article EN cc-by Communications Earth & Environment 2023-11-25

Siversson, M., Cook, T.D., Ryan, H.E., Watkins, D.K., Tatarnic, N.J., Downes, P.J. & Newbrey, M.G. 5 June 2018. Anacoracid sharks and calcareous nannofossil stratigraphy of the mid-Cretaceous Gearle Siltstone Haycock Marl in lower Murchison River area, Western Australia. Alcheringa 43, 85–113.Extensive bulk sampling over past 20 years greatly improved stratigraphic control permitted a meaningful revision previously described anacoracid from 'upper' Isolated teeth anacoracids are rare three...

10.1080/03115518.2018.1462401 article EN Alcheringa An Australasian Journal of Palaeontology 2018-06-04

Fossil Bothriembryon specimens were recovered from the northwestern edges of Nullarbor Plain, Western Australia, ∼300 km inland current southern coastline. This locality is significant because extant species are confined to within 50 Principle component analysis (PCA) was used compare with a morphologically comparable Eucla Basin, barretti, and geographically closest fossil species: kremnobates praecursor. Results showed strong support for new herein described as pilkiensis sp. nov....

10.1080/03115518.2024.2323472 article EN Alcheringa An Australasian Journal of Palaeontology 2024-04-02

Examination of isolated shark teeth from the uppermost lower Campanian Gonioteuthis quadrata scaniensis Zone southern Sweden revealed presence a rare, previously undescribed lamniform shark. The unusually small-sized anterior teeth, variable short and shallow median groove, cusplet shape outline posterior indicate dallasiellid affinity species is formally described as Dallasiella brachyodon sp. nov. It youngest record dallasiellids adds to extraordinarily high diversity sharks in...

10.1080/11035897.2022.2097737 article EN GFF 2022-04-03

The land snail genus Bothriembryon Pilsbry, 1894, endemic to southern Australia, contains seven fossil and 39 extant species, forms part of the Gondwanan family Bothriembryontidae.Little published data on geographical distribution exists.In this study, modern from nine Australian museums institutes were mapped for first time.The collection in Western Museum was curated current taxonomy.Using set, geological age species documented.Twenty two identified collection, with 15 these having a...

10.18195/issn.0312-3162.34(1).2019.038-050 article EN Records of the Western Australian Museum 2019-01-01

"RAISING TRANSPLANTS OF PINUS RADIATA IN THE KNYSNA DISTRICT WITHOUT USING BOXES." Journal of the South African Forestry Association, 27(1), pp. 90–91

10.1080/03759873.1956.9630787 article EN Journal of the South African Forestry Association 1956-01-01
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