Decapod anatomy are referred to as the "gonopods". At the end of the pleon is the tail fan, comprising a pair of biramous uropods and the telson, which bears the anus. Together, they are used for steering while swimming, and in the caridoid escape reaction. In crabs and some other carcinised decapods, the abdomen is folded under the cephalothorax. Decapod anatomy The decapod crustacean, such as a crab, lobster, shrimp or prawn, is made up of 20 body segments grouped into two main body parts, the cephalothorax and the pleon (abdomen). Each segment may possess one pair of appendages, although in various
Straight-billed hermit Straight-billed hermit The straight-billed hermit ("Phaethornis bourcieri") is a species of bird in the family Trochilidae, the hummingbirds. It is found in the Guyanas of Guyana, Suriname, and French Guiana; also the northern Amazon basin of Brazil, and Amazonian Colombia, Ecuador, and Peru; it is in eastern Venezuela and the Orinoco River Basin. Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest. Two subspecies are currently recognised: "P. b. bourcieri" and "P. b. major". However, recent molecular analysis has shown that "P. b. major" is more closely related to "Phaethornis philippii" and