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Rhynchocephalia (/ ˌ r ɪ ŋ k oʊ s ɪ ˈ f eɪ l i ə /; lit. ' beak-heads ') is an order of lizard-like reptiles that includes only one living species, the tuatara (Sphenodon punctatus) of New Zealand. Despite its current lack of diversity, during the Mesozoic rhynchocephalians were a speciose group with high morphological and ecological ...
Tuatara, along with other now-extinct members of the order Rhynchocephalia, belong to the superorder Lepidosauria, as do the order Squamata, which includes lizards and snakes. Squamates and tuatara both show caudal autotomy (loss of the tail-tip when threatened), and have transverse cloacal slits.
Rhynchocephalia — an order of lizard-like reptiles, slightly broader than the near-equivalent Sphenodontia; Subcategories. This category has only the following ...
Rhynchocephalia was a formerly widespread and diverse group of reptiles in the Mesozoic Era. [4] However, it is represented by only one living species: the tuatara (Sphenodon punctatus), a superficially lizard-like reptile native to New Zealand. [5] [6]
Rhynchocephalia is an order of lizard-like reptiles that includes only one living species of tuatara, which in turn has two subspecies (Sphenodon punctatus punctatus and Sphenodon punctatus guntheri), which only inhabit parts of New Zealand.
Lepidosauromorpha (in PhyloCode known as Pan-Lepidosauria [2] [3]) is a group of reptiles comprising all diapsids closer to lizards than to archosaurs (which include crocodiles and birds). The only living sub-group is the Lepidosauria , which contains two subdivisions, Squamata , which contains lizards and snakes , and Rhynchocephalia , the ...
Sphenodontidae is a family within the reptile group Rhynchocephalia, comprising taxa most closely related to the living tuatara (Sphenodon punctatus).Historically the taxa included within Sphenodontidae have varied greatly between analyses, and the group has lacked a formal definition. [2]
Amphisbaenia / æ m f ɪ s ˈ b iː n i ə / (called amphisbaenians or worm lizards) is a group of typically legless lizards, comprising over 200 extant species. Amphisbaenians are characterized by their long bodies, the reduction or loss of the limbs, and rudimentary eyes.