| 释义 |
telson Zool.|ˈtɛlsən|
[a. Gr. τέλσον a limit.]
The last segment of the abdomen or its median axis in certain crustaceans and arachnidans, as the middle flipper of a lobster's tail-fin, the long sharp spine of the king-crab, or the sting of the scorpion.
1855C. Spence Bate in Brit. Assoc. Rep. 28 The last [appendage of the abdomen], which for convenience we shall designate by the name of Telson,..is a rudimentary appendage, modified upon the type of the preceding three. 1872Nicholson Palæont. 144 The last segment of the abdomen is known as the ‘telson’, and it is variously regarded as a somite without appendages, or as an unpaired appendage placed in the middle line of the body. 1880Huxley Crayfish i. 19 The abdomen [has] a terminal flap which is called the telson.
Hence telˈsonic a.
1934in Webster. 1946Nature 28 Dec. 935/2 The caudal segment was probably composed of the sixth abdominal segment with which the telson had become fused, and thus these appendages must be telsonic. 1981Israel Jrnl. Zool. XXX. 115 The more primitive Hyssuridae have no telsonic statocysts. |
