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The Ancestor's Tale

Primate skulls, from Adapis (Eocene) at left to New World monkey, Old World monkey and gibbon at right Primate evolution sketch Tetonius sp., partial lower jaw with two teeth overlaid on drawing, Lower Eocene, Big Horn Basin, Wyoming Cantius, basal primate jaw (25 mm) showing four teeth, Early Eocene, Wildwood Formation, Bighorn Basin, Wyoming
Palaeolagus haydeni, 43 mm skull, Oligocene, Brule Formation, Pennington County, South Dakota Hyracotherium, 5 cm lower jaw with four teeth, Wildwood Formation, Lower Eocene, Bighorn Basin, Wyoming Mammuthus primigenius, 30 cm, Lena River, Siberia. Subadult showing worn p4 and m1. Eutherian stem placental, 22 mm right lower jaw with teeth. Hell's Creek Formation, near Jordon, Montana. Late Maastrichtian.
Cimolodon sp, multituberculate incisor, Hell Creek Formation, Late Maastrichtian, Montana, USA Morganucodon watsoni triconodont tooth, Late Triassic, Glamorgan, Wales Barasaurus besairiei (Piveteau 1955), Upper Permian Lower Sakamena Formation, Morondava Basin, Madagascar Balanerpeton woodi, 11 cm long, Lower Carboniferous (Visean, Brigantian), East Kirkton Quarry, Bathgate, Scotland.
Tristichopteris tetrapodomorph limb bones in pectoral fin highlighted Pentlandia macroptera, 15 cm, Eday Flagstone/John o' Groats Sandstone Group of South Ronaldsay, Orkney. Caridosuctor populosum, 225 mm, a large complete coelacanth. Bear Gulch, Montana. Mazon Creek Elonichthys palaeoniscid
Bear Gulch Harpagofututor volsellorhinus 16cm Diplacanthus crassisimus, 52 mm, Middle Devonian, Orkney. Gemuendina stuertzi, a 21 cm rhenanid placoderm from Bundenbach. Thyestes verrucosus, a Silurian osteostracan, Ludlow Series, Upper Silurian, Rootzkull, Oesel, Estonia
Tremataspis mammilata headshield, 32 mm, both dorsal and ventral sides exposed, Wenlock, Silurian, Elda Cliff, Osel Mazon Creek Mayomyzon pieckoensis a 45 mm complete lamprey. Haikouella lanceolata to 3 cm long, Lower Cambrian, Chengjiang biota. 6 pairs of branchial arches are visible as is an eye. Vetulicola cuneata
Parvancorina Horodyskia, 1.4 billion years, Australia, 'one of the oldest multicellular and coenocytic macro-organisms'

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