Pterodactyloidea Pterodactyloidea Pterodactyloidea (derived from the Greek words "πτερόν" ("pterón", for usual "ptéryx") "wing", and "δάκτυλος" ("dáctylos") "finger" meaning "winged finger", "wing-finger" or "finger-wing") is one of the two traditional suborders of pterosaurs ("wing lizards"), and contains the most derived members of this group of flying reptiles. They appeared during the middle Jurassic Period, and differ from the basal (though paraphyletic) rhamphorhynchoids by their short tails and long wing metacarpals (hand bones). The most advanced forms also lack teeth, and by the late Cretaceous, all known pterodactyloids were toothless. Many species had well developed crests on the skull, a form of
Alexis (given name) feminine variant, was the second most common name for girls born in Italy in 2006. "Alesia", a feminine variant, and "Aleksio", a masculine variant, are currently popular names for boys and girls in Albania. Alexis (given name) Alexis is a given name derived from several saints venerated by the Eastern Orthodox and Roman Catholic churches, including Saint Alexis of Rome. Alexis (Greek ἀλέξω or "aléxo") means "to help, defend". It was also used as a name for several members of the ruling house of Russia, including Tsar Alexei Mikhailovich, Tsarevich (heir apparent) Alexei Nikolaevich, and Tsarevich Alexei Petrovich. The name