Puneet Varma

Erettopterus

Updated on
Share on FacebookTweet on TwitterShare on LinkedIn
Kingdom  Animalia
Class  Merostomata
Family  †Pterygotidae
Rank  Genus
Subphylum  Chelicerata
Superfamily  †Pterygotioidea
Phylum  Arthropoda
Order  Eurypterid
Erettopterus
Similar  Eurypterid, Slimonia, Hughmilleria, Acutiramus, Dolichopterus

Erettopterus is a genus of prehistoric eurypterid. It was related to another large eurypterid, Pterygotus.

Contents

Description

Pterygotidae, which lived from the Ordovician to Devonian periods, were characterized by small to large exoskeletons with semilunar scales. The telson, (tail) was expanded, or flatter than it was tall. Pterygotidae also had chelicerae (claws in front of the mouth) that were large and long, with strong, well developed teeth on the claws. Their walking legs were small and slender, without spines.

Erettopterus is distinguishable from other Pterygotidae by its telson, which is bilobed. The distal margins of the chelicerae are angular. The prosoma (head) is semielliptical, with compound eyes located at the edge.

Species

  • Erettopterus Salter in Huxley & Salter, 1859
  • Erettopterus bilobus (Salter, 1856) — Silurian, Scotland
  • = Eurypterus perornatus Salter, 1856 — Silurian, Scotland
  • = Pterygotus bilobus var. acidens Woodward, 1878 — Silurian, Scotland
  • = Pterygotus bilobus var. crassus Woodward, 1878 — Silurian, Scotland
  • = Pterygotus bilobus var. inornatus Woodward, 1878 — Silurian, Scotland
  • = Pterygotus bilobus var. perornatus Woodward, 1878 — Silurian, Scotland
  • = Pterygotus perornatus var. plicatissimus Salter in Huxley & Salter, 1859 — Silurian, Scotland
  • Erettopterus brodiei Kjellesvig-Waering, 1961 — Silurian, England
  • Erettopterus canadensis (Dawson, 1879) — Silurian, Canada
  • Erettopterus exophthalmus Kjellesvig-Waering & Leutze, 1966 — Silurian, USA
  • Erettopterus gigas Salter in Huxley & Salter, 1859 — Silurian, England
  • Erettopterus globiceps Clarke & Ruedemann, 1912 — Silurian, USA
  • Erettopterus grandis Pohlman, 1881 — Silurian, USA
  • Erettopterus holmi (Størmer, 1934) — Silurian, Norway
  • Erettopterus laticauda Schmidt, 1883 — Silurian, Estonia
  • Erettopterus marstoni Kjellesvig-Waering, 1961 — Silurian, England
  • Erettopterus megalodon Kjellesvig-Waering, 1961 — Silurian, England
  • Erettopterus osiliensis Schmidt, 1883 — Siluria, Estonia,
  • Erettopterus saetiger Kjellesvig-Waering, 1964 — Silurian, USA
  • Erettopterus serratus Kjellesvig-Waering, 1961 — Devonian, USA
  • Erettopterus spatulatus Kjellesvig-Waering, 1961 — Silurian, England
  • ?Erettopterus vogti Størmer, 1934a — Devonian, Norway
  • Erettopterus waylandsmithi Kjellesvig-Waering & Caster, 1955 — Silurian, USA
  • References

    Erettopterus Wikipedia


    Similar Topics
    Acutiramus
    Dolichopterus
    Eurypterid
    Topics