LINGULIDE BRACHIOPODS AND THE TRACE FOSSIL LINGULICHNUS FROM THE TRIASSIC OF WESTERN CANADA: IMPLICATIONS FOR FAUNAL RECOVERY AFTER THE END-PERMIAN MASS EXTINCTION

摘要: Abstract The environmental distribution of lingulide brachiopods in western Canadian Triassic marine successions, their relationship with other infaunal organisms occupying the same ecospace, and role aftermath Permian-Triassic extinction event is summarized. Western Canada an ideal location to assess patterns as upper Paleozoic lower Mesozoic strata are extensively exposed, lingulides (cf. Lingularia Biernat Emig) trace fossil Lingulichnus Hakes both common. A comparison situ concordantly emplaced shells shell beds shows clearly that latter a poor indicator true these suspension feeders. Lingulides rare uppermost study area. Most occurrences consist isolated valves or abraded material erosional lags. remain minor components communities during earliest Tr...