summary of life development in mesozoic time

the outstanding feature of the life of mesozoic time is the rise to dominance of the reptiles and their radiation into almost all modes of existence on the lands, in the waters, and in the air . chief place among the invertebrates is occupied by the cephalopods which reached at this time the culmination of their career. this is indicated by their extraordinary specialization along many lines, multitudinous variety, and the gaint stature of some forms. the characteristic plant group of the era is that of the cycaduphytes, though in cretaseous time the appearance of the highest type of seed - bearing plants, the angiospermes, introduces modern aspects in the flora . a paleontological description is given of 23 footprints of dinosaurs found in the continental liassic formations north of kerman. five different type are recognized . four of them are attributed to ornithopod dinosaurs , and one to grallator, a coelurosaurian theropod (a. f. de lapparent, et m. davoud, zadeh) .