16 ANTHURIDEA • ANTHURIDAE 



Key to families of Anthuridea 



1 . Mouthparts adapted for piercing and sucking, together forming 



conelike structure Paranthuridae p^l 



Mouthparts adapted for cutting, lamina dentata and molar usually 

 present 2 



2. Pereopod 1 subchelate, with propodus expanded; pleonites generally 



fused; if free, much shorter than wide Anthuridae </ 



Pereopods 1-3 subchelate, subsimilar; pleonites free, often as long as 



wide Hyssuridae fCo 



Family Anthuridae Leach, 1814 



DIAGNOSIS Mouthparts adapted for cutting. Pereopod 1 usually markedly 

 different from remaining pereopods, subchelate with propodus more or less 

 inflated. Exopod of pleopod 1 operculiform, covering remaining pleopods. 

 Pleonites 1-5 fused, with fusion marked ventrolaterally by short slits, occa- 

 sionally with dorsal grooves marking lines of fusion, or free; if free, length of 

 each pleonite much less than width. Pleotelson with pair of statocysts, or 

 single medial statocyst, or lacking statocysts. 



Key to genera of Anthuridae 



1 . Pleopod 1 , both rami contributing to operculum 2 



Pleopod 1 , only exopod operculiform 6 



2. Antennal peduncle bearing serrate process Licranthura H> 



Antennal peduncle lacking any serrate process 3 



3. Pleopod 1 in 9 , rami to some degree fused Eisothistos ^ 



Pleopod 1 in 9 , rami free 4 



4. Pereopods 1 and 2 subchelate, of similar size, propodi not noticeably 



inflated 5 



Pereopod 1 much larger and propodus more expanded, than 



pereopod 2 Minyanthura 



