Cambrian
101Ordovician — Period 488.3–443.7 million years ago …
102Microdictyon — Temporal range: Early Cambrian–Middle Cambrian Microdictyon sinicum reconstruction Scientific classification Kingdom …
103Chancelloriidae — Temporal range: Early Cambrian–Late Cambrian …
104Dawkins vs. Gould —   First edition cover …
105Paleontology — Palaeontology redirects here. For the scientific journal, see Palaeontology (journal). Paleontology studies the entire history of life on Earth. Paleontology (pronounced /ˌpælɪɒnˈtɒlədʒi/; British: palaeontology; from Greek: παλαιός… …
106Mollusca — Temporal range: Cambrian–Recent …
107Trace fossil — Chirotherium footprints in a Triassic sandstone …
108Sponge — This article is about the aquatic animal. For the porous cleaning tool, see Sponge (material). For other uses, see Sponge (disambiguation). Sponge Temporal range: Ediacaran–Recent …
109Trilobite — ] Highly complex compound eyes are another obvious feature of the cephalon (see below). Figure 3 shows gross morphology of the cephalon. The cheeks (genae) are the pleural lobes on each side of the axial feature, the glabella. When trilobites… …
110Wiwaxia — Taxobox fossil range = Early–Middle Cambrian regnum = Animalia superphylum = Lophotrochozoa phylum = incertae sedis unranked classis = Halwaxiida familia = Wiwaxiidae familia authority = Walcott, 1911 genus = Wiwaxia binomial = Wiwaxia corrugata… …
