ERTH 2401 Lecture Notes - Lecture 4: Carl Linnaeus, Jigsaw Puzzle, Tyrannosauridae
26 Oct 2018
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A cat: domain: eukaryota, kingdom: animalia, phylum: chordata (have a back bone, humans in this phylum, class: mammalia (mammals, order: carnivora, family: felidae, genus: felis, species: domesticus, ex. Horse and whale both have lungs, trout does not. Protozoa: single cell, mainly aquatic, motile (can move, ex. Haikouichthys from china, 525 ma ago: cephalochordates, next step in evolution, closest relatives to vertebrates, one specimen in cambrian period, modern representatives had blood vessel branches, ex. Lancet: pikaia (way back in burgess shale, an organism with a notochord, a defining structure of the chordates, 508 ma old. Invertebrate: possibly earliest representative taxon of cephalochordates, modern cephalochordates. Large eyes for hunting, can sink deep down and still see prey: nares (nostrils, skull roof has characteristic pattern, often like to find skulls, because when have the skull, always able to identify on species and genus level.
