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Patagia on a flying squirrel. The patagium (pl.: patagia) is a membranous body part that assists an animal in obtaining lift when gliding or flying.The structure is found in extant and extinct groups of flying and gliding animals including bats, theropod dinosaurs (including birds and some dromaeosaurs), pterosaurs, gliding mammals, some flying lizards, and flying frogs.
Fgf8 is expressed in bat interdigit tissue during a time when apoptosis occurs which does not occur in mice. Thus, FGFs may play a role in blocking the apoptotic effects of BMPs in the bat wing interdigit. Finally, applying ectopic BMPs and FGF antagonists to developing bat wings results in apoptosis of the patagium. [5]
A bat wing, which is a highly modified forelimb. Bats are the only mammal capable of true flight. Bats use flight for capturing prey, breeding, avoiding predators, and long-distance migration. Bat wing morphology is often highly specialized to the needs of the species. This image is displaying the anatomical makeup of a specific bat wing.
The patagium is the wing membrane; it is stretched between the arm and finger bones, and down the side of the body to the hind limbs and tail. This skin membrane consists of connective tissue, elastic fibres, nerves, muscles, and blood vessels. The muscles keep the membrane taut during flight. [64]
The head and body of the bat measures from 90–95 mm (3.5–3.7 in) in length and have a vestigial tail. The forearm length is about 50–63 mm (2.0–2.5 in). The wing membrane joins with the phalanges of the first toe rather than the second toe as typical in many other fruit bats. The bat weigh anywhere from 26–30 g (0.92–1.06 oz).
It has a comparatively small nose-leaf, with an oval to lanceolate tip. The lower lip bears a central pad surrounded by a semi-circular row of wart-like structures. The main part of the wing membrane extends down to the ankles; the bat has no tail and only a vestigial tail membrane. [6] The wings have an aspect ratio of 6 and a wing loading of ...
The wing surface extends between the legs, a membrane known as a uropatagium, and the structure of these is a characteristic in many of the genera. They have tails which are partially enclosed, a short part of which projects through the uropatagium to form a sheath.
The Molossidae, or free-tailed bats, are a family of bats within the order Chiroptera. [1] The Molossidae is the fourth-largest family of bats, containing about 110 species as of 2012. [2] They are generally quite robust, and consist of many strong-flying forms with relatively long and narrow wings with wrinkled lips shared through their genus. [3]