Similarly, typhlopids appear to have reached Australia from Southeast Asia or Indonesia about 28 million years ago. South American typhlopids appear to have evolved from African typhlopids that rafted across the Atlantic about 60 million years ago they, in turn, dispersed to the Caribbean about 33 million years ago. Typhlopids, initially isolated on Madagascar, then dispersed to Africa and Eurasia. Scolecophidians are believed to have originated on Gondwana, with anomalepidids and leptotyphlopids evolving in west Gondwana (South America and Africa) and the Typhlopoidea (typhlopids, gerrhopilids, and xenotyphlopids) on east Gondwana, initially on the combined India/ Madagascar land mass, during the Mesozoic. Within Typhlopoidea, Gerrhopilidae likely diverged from the Xenotyphlopidae-Typhlopidae clade during the Early Cretaceous, and Xenotyphlopidae and Typhlopidae likely diverged from one another during the Late Cretaceous. Most tropical and many subtropical regions all over the worldĭespite only having fossils as early as the Cretaceous, Scolecophidia itself likely originated in the Middle Jurassic, with Anomalepididae, Leptotyphlopidae, and Typhlopoidea diverging from one another during the Late Jurassic. India, Southeast Asia, Indonesia, the Philippines, and New Guinea Southern Central America and South America It refers to their shape and fossorial lifestyle. The infraorder name Scolecophidia derives from the two Ancient Greek words σκώληξ or σκώληκος ( skṓlēx, genitive skṓlēkos), meaning "earthworm", and ὄφις ( óphis), meaning "snake". The Scolecophidia infraorder is most likely paraphyletic. Five families and 39 genera are recognized. All are fossorial (adapted for burrowing). They range in length from 10 to 100 centimetres (4 to 40 inches). The Scolecophidia, commonly known as blind snakes or thread snakes, are an infraorder of snakes.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |