horned viper, cerastes, sand viper, horned asp, Cerastes cornutus
['chambered nautilus, pearly nautilus, nautilus', 'weasel', 'cougar, puma, catamount, mountain lion, painter, panther, Felis concolor', 'barn spider, Araneus cavaticus', 'sea slug, nudibranch', 'flatworm, platyhelminth', 'earthstar']