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Crinoidea (sea lilies) Asteroidea (starfishes) Ophiuroidea (brittle stars) Echinoidea (sea urchins) Holothuroidea (sea cucumbers) ...
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Hurdia from the Burgess Shale. Hurdia. Amongst the most primitive and oldest known of true arthropods. ... Survived until Early Permian (about 280 million years ago) ...
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From Late Devonian (dominant and common in Late Devonian and Carboniferous) Equisetum arvense ... Known since Late Carboniferous. Coniferophyta ('evergreens' or ' ...
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What can groups tell us about evolutionary processes? Themes of ... Walchia, a fossil fern-like plant. 280 million year old footprints from Germany. Deep Time ...
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Anura (frogs and toads) Gymnophiona (limbless amphibians) Caudata (salamanders) ... Anura (frogs and toads) Scaphiopus couchi. Anura (frogs and toads) NEW ...
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