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  1. More Images

    Anapsid

    Subclass of reptiles

    An anapsid is an amniote whose skull lacks one or more skull openings near the temples. Traditionally, the Anapsida are considered the most primitive subclass of amniotes, the ancestral stock from which Synapsida and Diapsida evolved, making anapsids paraphyletic. It is, however, doubtful that all anapsids lack temporal fenestra as a primitive trait, and that all the groups traditionally seen as anapsids truly lacked fenestra. Wikipedia

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  2. sciencedirect.com

    Anapsid is a term for reptiles that lack temporal fenestrae in their skulls, such as turtles and some fossil forms. Learn about the evolution, diversity, and classification of anapsids and their relatives in the Paleozoic and Mesozoic eras.
  3. notesonzoology.com

    In this article we will discuss about the classification of reptilia. Reptilia # Subclass Anapsida: Primitive Reptilia in which the bones of the skull join to form an uninterrupted roof. Order Cotylosauria (extinct): 1. The vertebrae are gastrocentrous. 2. The limbs are typically reptilian with five digits. Examples. Diadectes, Procolophon, etc. Order Chelonia: 1. The broad trunk is encased in ...
  4. encyclopedia.com

    Anapsida Group of reptiles characterized by a skull that lacks apertures in the temple regions behind the eyes. This was the condition in the earliest reptiles, the Cotylosauria or 'stem reptiles'. Four groups flourished in the late Palaeozoic: the Captorhinomorpha; the Mesosauria; the Pareiasauridae; and the Procolophonia, which survived into the Triassic.
  5. wikiwand.com

    An anapsid is an amniote whose skull lacks one or more skull openings (fenestra, or fossae) near the temples. [1] Traditionally, the Anapsida are considered the most primitive subclass of amniotes, the ancestral stock from which Synapsida and Diapsida evolved, making anapsids paraphyletic.It is, however, doubtful that all anapsids lack temporal fenestra as a primitive trait, and that all the ...
  6. Throughout these pages then, anapsida and parareptilia are used synonymnously and interchangeably MAK120323. Links: Introduction to the Anapsids; Phylogeny & Classification of Amniotes; Parareptiles; Reptiles - Subclass Anapsida; Anapsida -- The Dinosauricon; Anapsida; Basal Anapsida after Berman et al., 2000, Lee, 1993, 1996 and ...
  7. simple.wikipedia.org

    General diagram of the anapsid skull. An anapsid is an amniote whose skull does not have openings on the sides behind the eyes. [1] This is A primitive ('basal') condition for early amniotes in the Mississippian (early Carboniferous).; A secondary ('derived') condition of some other reptile groups, probably including turtles ().; Some other groups were anapsids, such as the mesosaurs.

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