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
Greek rock lizard will in some cases spit acid at other animals that annoy it. The chief threats faced by the Greek rock lizard are fires and the planting of "Eucalyptus" trees in place of the natural vegetation of the region. Although the lizard is quite common in places, its total area of occupancy is only around and as the amount of suitable habitat is reduced, its numbers are decreasing. The International Union for Conservation of Nature has listed it as being "near threatened" and bordering on "vulnerable. Greek rock lizard The Greek rock lizard ("Hellenolacerta graeca") is a species of lizard in