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The elytra primarily serve as protective wing-cases for the hindwings underneath, which are used for flying. To fly, a beetle typically opens the elytra and then extends the hindwings, flying while still holding the elytra open, though many beetles in the families Scarabaeidae and Buprestidae can fly with the elytra closed (e.g., most Cetoniinae; [7]).
Microscope image of an individual elytron from Augenerilepidonotus dictyolepis.Note the fringing papillae on the border. In annelids, elytra (/-t r ə /; from Greek ἔλυτρον "sheath, cover"; sg.: elytron / ˈ ɛ l ə t r ɒ n /) are shield-like scales that are attached dorsally, one pair on each of a number of alternating segments and entirely or partly cover the dorsum.
A barrel roll attack is a military maneuver that improves the attacker's offensive position and prevents the attacker from overshooting. In this maneuver the defender breaks one direction and so the attacker performs a barrel roll in the opposite direction. The attacker pulls back on the stick more than a normal barrel roll, performing a ...
A sequence of two barrel rolls performed during an acro dance. A barrel roll turn, or simply barrel roll, is a turn that involves casting the arms up and leaping into the air and rotating 360 degrees while airborne. While airborne, the performer's back may be arched and the head may be cast back.
Barrel roll; a combination of a loop and a roll. The flight path during a barrel roll has the shape of a horizontal corkscrew and follows a helical path. Aileron roll; 360° revolution about the longitudinal axis at maximum roll rate. It consists of a pitch-up followed by a roll which is uncontrolled in the pitch axis, resulting in an initial ...
A high-g barrel roll is a combination of a loop and a snap roll. A high g barrel roll is a last-ditch defensive maneuver, performed when the attacker has achieved a suitable guns solution, in order to cause an overshoot. The high-g barrel roll is a violent maneuver which is performed much more aggressively than a normal barrel roll.
The underside and head of a female spider. Spiders, unlike insects, have only two main body parts ( tagmata) instead of three: a fused head and thorax (called a cephalothorax or prosoma) and an abdomen (also called an opisthosoma ). The exception to this rule are the assassin spiders in the family Archaeidae, whose cephalothorax is divided into ...
A heartline roll, also known as a barrel roll, is a 360-degree roller coaster inversion that rotates at the center of the train on one axis. The focus of the element is keeping the train moving in a straight line , which is accomplished by having the track change in elevation – rising and falling – throughout the inversion.