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
Burton's legless lizard "L. burtonis" is not a priority for conservation as it is Australia's most widespread reptile and inhabits almost all Australian habitat types with only a few exceptions. In addition, it is not known how abundant Burton’s legless lizard is, but there has been no indication that this species is rare or rapidly declining. Consequently, while Burton’s legless lizard has not been assessed for an IUCN conservation status yet, it is predicted with a fair degree of confidence that it would be given the status of "least concern". Burton's legless lizard Burton's legless lizard ("Lialis burtonis") is a species of lizard