Palæos: Paleozoic		wenlock epoch
SILURIAN PERIOD		Wenlock

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The Wenlock

The Wenlock Epoch of the Silurian Period: 428 to 423 Mya

 

Paleozoic Era       Cambrian Period      Ordovician Period      Silurian Period         Llandovery Epoch        Wenlock Epoch            Sheinwoodian Age           Homerian Age        Ludlow Epoch         Pridoli Epoch      Devonian Period      Carboniferous Period      Permian Period

During the Wenlock the oldest known tracheophytes (land plants), of the genus Cooksonia, appear. The complexity of slightly younger (Ludlow) Gondwana plants like Barragwanatha indicates either a much longer history for vascular plants, perhaps extending into the early Silurian or even Ordovician, or else a misdating of the Barragwanatha sediments.

Stratigraphy  

Marine Invertebrates

Subclass Trilobita Order Phacopida Family Calymenidae Calymene blumenbachi Horizon: Wenlock Mudstone Locality: near Wenlock Edge in Shropshire, England Size: slightly over 5 cm long notes: collected by Tom Levinson

Subclass Trilobita Order Phacopida Family Calymenidae Calymene cerebra Horizon: Niagara Group Locality: Wisconsin, USA Size: (scale bar in cm)

Vertebrates

Jawless fishes

Class: Osteostraci	Class: Anaspida
Ateleaspis	Pharyngolepis	Lasanius