MARINE GAMMARIDEAN AMPHIPODA 425 



Parapleustes Buchholz 



Parapleustes Buchholz, 1874. — Sexton, 1909. 

 IncisocalUope J. L. Barnard, 1959a. 



Type-species: [P. glacilis Buchholz, 1874, =lapsus] P. gracilis 

 Buchholz, 1874 (monotypy). See Sars, 1895 (as Paramphithoe brevi- 

 cornis) . 



Mandibular molar a small smooth protuberance; article 3 of maxil- 

 lipedal palp not distally produced; gnathopods subchelate; antennae 

 "long," gnathopods usually lacking a lobe on article 5, rostrum reaching 

 only one third along article 1 (Pleustes). Species: 14, arctic-boreal, 

 littoral. 



Parepimeriella Schellenberg 



Parepimeriella Schellenberg, 1931. 



Type-species: P. irregularis Schellenberg, 1931 (monotypy). 



Mandibular molar large, ridged; article 3 of maxilHpedal palp not 

 distally produced; gnathopods simple, slender. Species: 1, Falkland 

 Islands, littoral. 



Pleustes Bate 



Pleustes Bate, 1858b.— Stebbing, 1906. 



Type-species: Amphithoe panopla Kr0yer, 1838 (monotypy and 

 subsequent synonymy). See Sars, 1895. 



Mandibular molar a small smooth protuberance; article 3 of 

 maxilHpedal palp not distally produced; gnathopods subchelate, stout; 

 antennae "short," gnathopods bearing a strong posterior lobe on article 

 5, rostrum usually reaching apex of peduncle of antenna 1 in typical 

 species [except Pleustes behningi {Gurjanova, 1938) which should be 

 transferred to Parapleustes]. Species: 7, arctic-boreal, httoral. 



Pleusymtes, new genus 



Type-species: Amphithopsis glaber Boeck, 1861 (present selec- 

 tion). See Sars, 1895. 



Species included: All species Hsted by Barnard and Given (1960, 

 p. 40) under the name "Sympleustes." 



Mandibular molar large, ridged; article 3 of maxilHpedal palp not 

 produced; gnathopods subchelate; rostrum extending less than one 

 quarter along article 1 of antenna 1 (Mesopleustes) . Species: 17, 

 arctic-boreal, littoral to abyssal. 



Stenopleustes Sars, new synonymy 



Stenopleustes Sars, 1895. — Stebbing, 1906. 



Synipleustes Stebbing, 1899d (type: Amphithoe [sic] latipes M. Sars, 1858). 



