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The development of insect mouthparts from the primitive chewing mouthparts of a grasshopper in the centre (A), to the lapping type (B) of a bee, the siphoning type (C) of a butterfly and the sucking type (D) of a female mosquito.
In entomology, the labrum amounts to the "upper lip" of an insect mouth, the corresponding "lower lip" being the labium. The evolutionary origin, embryogenesis, and morphological development of the labrum have proved to be some of the most controversial and challenging topics in the study of arthropod head structures.
Lizards have evolved several modes of communication, including visual, chemical, tactile, and vocal. [9] [2] Chemical and visual communication are widespread, with visual communication being the most well-studied, while tactile and vocal communication have traditionally been thought to occur in just a handful of lizard species; however, modern scientific techniques have allowed for greater ...
Upper head-scales unequal, strongly keeled; a compressed prominent scale on the posterior part of the superciliary region; 7 to 11 upper labials. The male's gular appendage very large, always much longer than the head, and frequently twice as long; female also with a well-developed but smaller gular sac. Male with a very small nuchal crest.
This lizard feeds on small invertebrates such as ants, flies, grasshoppers and ground beetles. When rain falls, it stands with its hind legs straightened, its front legs bent and its head lowered, so that water landing on its back trickles towards its mouth. [4] A female becomes sexually mature when about 9 cm (3.5 in) long.
Breeding males are the colorful ones, with an orange or red head, indigo blue or black body, and a tail that is bluish white at the base with an orange middle segment and a black tip, the FWC said.
Phrynocephalus persicus, commonly known as the Persian toad-headed agama, is a small diurnal desert lizard of the family Agamidae.It is the westernmost representative of the Central Asian genus of toad-headed agamas Phrynocephalus and is only known from deserts and semideserts of Iran and possibly Azerbaijan.
The viperfish is a swift swimmer, easily catching up to its prey. Once it reaches a small shrimp or fish, it unhinges its enormous jaw to impale the creature and trap it inside its mouth.