Identify the main topic and retell key details of a text. In addition to that RI1.
Megadermatidae false vampire bats horseshoe bats and allies Internal relationships of the Chiroptera, with the megabats subsumed within Yinpterochiroptera, according to a study  Giant golden-crowned flying foxAcerodon jubatus In the s, a hypothesis based on morphological evidence stated the Megachiroptera evolved flight separately from the Microchiroptera.
The flying primate hypothesis proposed that, when adaptations to flight are removed, the Megachiroptera are allied to primates by anatomical features not shared with Microchiroptera. For example, the brains of megabats have advanced characteristics.
Although recent genetic studies strongly support the monophyly of bats,  debate continues about the meaning of the genetic and morphological evidence. It also had longer hind legs and shorter forearms, similar to climbing mammals that hang under branches, such as sloths and gibbons.
This palm-sized bat had short, broad wings, suggesting that it could not fly as fast or as far as later bat species. Instead of flapping its wings continuously while flying, Onychonycteris probably alternated between flaps and glides in the air.
This model of flight development, commonly known as the "trees-down" theory, holds that bats first flew by taking advantage of height and gravity to drop down on to prey, rather than running fast enough for a ground-level take off. The first is that laryngeal echolocation evolved twice in bats, once in Yangochiroptera and once in the rhinolophoids.
The Eocene bats Icaronycteris 52 million years ago and Palaeochiropteryx had cranial adaptations suggesting an ability to detect ultrasound. This may have been used at first mainly to forage on the ground for insects and map out their surroundings in their gliding phase, or for communicative purposes.
After the adaptation of flight was established, it may have been refined to target flying prey by echolocation. List of bats and List of fruit bats Bats are placental mammals.
Around twenty years later, the German naturalist Johann Friedrich Blumenbach gave them their own order, Chiroptera. Microbats use echolocation for navigation and finding prey, but megabats apart from those in the genus Rousettus do not, relying instead on their eyesight.I found a great website that gives all the answers to this nice little book.
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