Palaeophonus

Palaeophonus
Temporal range: Wenlock–Early Devonian

[1][2]

Model of Palaeophonus nuncius
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Arachnida
Order: Scorpiones
(unranked): Protoscorpiones
Genus: Palaeophonus
Thorell & Lindström, 1884

Palaeophonus (meaning ancient killer) is the oldest known genus of scorpion.[2]

Fossil records

Palaeophoneus nuncius fossil from Sweden

This genus is known in the fossil record from the Silurian to the Carboniferous (age range: 428.2 to 314.6 million years ago). Fossils have been found in Europe, United States and Canada.[3]

Description

Palaeophonus was virtually identical to modern scorpions. It grew to a lengths of 2.5–3.5 inches (64–89 mm). [4] These animals did not have eyes and therefore they were blind. [5]

Until a few decades ago it was thought that Palaeophonus, similarly to many other scorpions of the Silurian, was one of the earliest animals to have conquered the land. In fact, a closer examination of the fossils has determined that these animals possess well developed gills, very similar to those of contemporary Eurypterids (or sea scorpions). [6]

It is likely, therefore, that Palaeophonusand its relatives were water scorpions, living in the estuaries to hunt small prey. In any case, it is highly likely that these animals reached from time to time the mainland [7] and would have preyed upon small creatures that lived alongside it, including primitive springtails and millipedes.

Species

Restoration of dorsal side of Palaeophonus nuncius

Species within this genus include: [3]

References

  1. Laurie, M. (2012). "XIX.—On a Silurian Scorpion and some additional Eurypterid Remains from the Pentland Hills". Transactions of the Royal Society of Edinburgh 39 (3): 575. doi:10.1017/S0080456800035109.
  2. 1 2 Dunlop, J. A. (2010). "Geological history and phylogeny of Chelicerata". Arthropod Structure & Development 39 (2–3): 124. doi:10.1016/j.asd.2010.01.003.
  3. 1 2 Paleobiology Database
  4. G. A. Polis The Biology of scorpions
  5. The Eurypterida of New York Volume 1.pdf/408
  6. Alexander Petrunkevitch Paleozoic and Mesozoic Arachnida of Europe
  7. Ellie Zolfagharifard Ancient scorpion reveals its land legs: 430 million-year-old fossils suggest the sea creatures may have walked out of the ocean
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