Fossils of large terrestrial arthropods from the Lower Devonian of Canada

  title={Fossils of large terrestrial arthropods from the Lower Devonian of Canada},
  author={William A. Shear and Patricia G. Gensel and Andrew J. Jeram},
TERRESTRIAL arthropods have a fossil record that reaches back to at least the Upper Silurian (420 million years ago). Most available data on these early land animals comes from a few sites at which abundant microarthropod remains are preserved as organic cuticle fragments. Such cuticle assemblages imply that early terrestrial ecosystems were dominated by small arthropods of the soil and litter. We describe here new impression and impression/compression fossils from the Emsian stage of New… 
Devonian terrestrial arthropods from Gondwana
The first atelocerates from the Devonian stages of Gondwana are described; these are perhaps the earliest known remains of Australian land animals and add substantially to knowledge of the anatomy of this problematic arthropod.
A new mid-Silurian aquatic scorpion—one step closer to land?
It is postulate that these animals were aquatic, but occasionally ventured into extremely shallow water, or onto a transient subaerially exposed surface while moulting, before returning to deeper water.
Ichnology of the Devonian (Emsian) Campbellton Formation, New Brunswick, Canada
The Campbellton Formation has long been known to yield a fossil assemblage of Devonian (Emsian) fish and eurypterids at its westernmost exposure near Campbellton and Atholville, and a well described
Water-to-Land Transitions
Arthropods are, by a considerable margin, the most species-rich group of animals alive today and have long been a major component of the Earth’s biodiversity. Exact counts of the total number of
Abstract The Paleozoic spread of plants, beginning in the Ordovician and reaching a phase of accelerated diversity and dispersal in the Early Devonian, was a critical episode in Earth history. The
Lower Devonian Coaly Shales of Northern New Brunswick, Canada: Plant Accumulations in the Early Stages of Terrestrial Colonization
Abstract We describe two Early Devonian occurrences of coaly shale composed mainly of the compacted remains of early plants, such that they resemble coal. Among the earliest thick phytodebris
Early Terrestrial Animals, Evolution, and Uncertainty
An introduction to this period in life’s history, first presenting background information, before focusing on one animal group, the arthropods, to illustrate the importance of both uncertainty and scientists’ freedom to express doubt while a consensus is being built.


Early Land Animals in North America: Evidence from Devonian Age Arthropods from Gilboa, New York
The centipedes and possible insects found at a new fossil site near Gilboa, New York, may represent the earliest records known for these groups of terrestrial arthropods.
The ecology of Paleozoic terrestrial arthropods: the fossil evidence
It is postulated that herbivory, defined as predation on living plants, may have been rare in early Paleozoic terrestrial ecosystems, and that most primary productivity of terrestrial arthropods was diverted into higher trophic levels.
Land animals in the silurian: arachnids and myriapods from shropshire, England.
The presence of predatory arthropods suggests that complex terrestrial ecosystems were in place by the late Silurian (414 x 10(6) years before present) and that the animal invasion of the land occurred earlier than was previously thought.
The Silurian-Devonian Fossil Record of the Myriapoda
  • J. Almond
  • Environmental Science, Geography
  • 1985
The oldest recorded terrestrial invertebrates are various small Diplopods (millepedes) from the Lower Old Red Sandstone of Britain which were probably preserved preferentially due to their robust
Record of Palaeozoic pseudoscorpions
PSEUDOSCORPIONS (Class Arachnida; Order Pseudoscor-piones) represent a diverse and abundant group of small predatory arthropods1–4. Approximately 3,000 living species occupy habitats ranging from sea
A subaerial arthropod trackway from the Upper Silurian Clam Bank Formation of Newfoundland
Trackways are reported for the first time from Silurian rocks in Newfoundland. They occur in the Clam Bank Formation of the Port au Port Peninsula. At least one of the trackways represents one of the
Limb structure, affinity and diet of the Carboniferous ‘centipede’ Arthropleura
A juvenile specimen of Arthropleura has lycopod fragments preserved as gut contents, proving that this creature was herbivorous and not carnivorous as suggested by Waterlot, one of several features indicating parallel evolution of the Arthropoda and the living polydesmid millipedes.
Depositional environment and preservation of biota in the Lower Devonian hot-springs of Rhynie, Aberdeenshire, Scotland
The Lower Devonian plant- and arthropod-bearing cherts of the Rhynie area of Aberdeenshire, NE Scotland, were deposited from silica-rich waters emanating from the hot-springs of a precious-metal (Au)
Palaeophysiology of terrestrialisation in the Chelicerata
New and well-preserved material of the earliest demonstrably terrestrial scorpions from the Lower Carboniferous suggests that book-lungs developed directly from book-gills by suturing of the covering plate to leave stigmata for diffusion of air, supporting the ideas of early authors that the scorpion mesosomal ‘sternites’ are fused plates.
Book-lungs in a Lower Carboniferous scorpion
Portions of book-lungs have now been discovered in two specimens of a fossil scorpion with abdominal plates from a Lower Carboniferous limestone in Scotland, providing the first direct evidence ofbook-l Lungs and also the earliest evidence of air-breathing in a Palaeozoic scorpion.