ðɛɹ fˈɔːɹlɪmz wɜː smˈɔːl ænd pˈædəllˈaɪk, ænd ʌnlˈaɪk lˈɪvɪŋ kɹˌɑːkədˈɪliənz, ðeɪ lˈɔst ðɛɹ ˈɑːstɪˌoʊdɜːmz"ˈɑːɹmɚ skjˈuːts".
Their forelimbs were small and paddle-like, and unlike living crocodylians, they lost their osteoderms ("armour scutes").