MARLNTE GAMMARIDEAN AMPHIPODA 175 



Antenna 1 shorter than antenna 2; accessory flagellum absent; 

 lower lip with slight inner lobes; gnathopodal palms distinct, article 5 

 slightly longer than article 6 and occasionally elongate, articles 5-6 

 together not elongate, article 5 of gnathopod 1 lacking posterior lobe; 

 telson pointed, toothed, emarginate or rounded; coxa 4 slightly longer 

 than coxa 1 (Haliragoides) ; calceoli absent on male antennae (Halirages) . 

 Species: 16, biboreal, littoral. 



Atylopsis Stebbing 



Atylopsis Stebbing, 1888; 1906. 



Type-species: A. emarginatus Stebbing, 1888 (present selection). 



Antenna 1 shorter than antenna 2 in type but otherwise variable in 

 length ; accessory flagellum shorter than article 1 of primary flagellum ; 

 lower lip with inner lobes; gnathopodal palms distinct, articles 5 and 6 

 together not elongate, article 5 on gnathopod 2 shorter than 6, article 

 5 of gnathopod 1 as long as 6 or shorter than 6, lacking posterior lobe; 

 gnathopod 2 occasionally slightly elongate; telson with deep notch, 

 broad or narrow. Species: 3, antiboreal, subantarctic, littoral 

 (one species to 567 m). 



Bouvierella Chevreux 



Bouvierella Chevreux, 1900. 



Type-species: Paramphithoe carcinophilus Chevreux, 1889 (mono- 



typy)- 



Antenna 1 slightly longer than antenna 2; accessory flagellum 

 absent; lower lip without inner lobes; gnathopodal palms distinct, 

 article 5 of gnathopod 1 slightly shorter than article 6, with weak 

 posterior lobe, articles 5 and 6 together on gnathopods slightly 

 elongate; telson emarginate; pereopods 1-5 minutely subcheliform 

 (Apherusa, Calliopiella, and Halirages). Very close to Leptamphopus 

 but gnathopod 2 not fully elongate and outer ramus of uropod 3 

 nearly as long as inner. Species: 1, Atlantic bathyal (620-1,386 m). 



Calliopiella Schellenberg 



Calliopiella Schellenberg, 1925b. 

 Type-species: Calliopiella michaelseni Schellenberg, 1925b (mono- 



typy)- 



Antenna 1 slightly shorter than antenna 2 ; accessory flagellum scale- 

 like (type) or absent; lower lip without inner lobes; gnathopodal palms 

 distinct, article 5 shorter than article 6, together not elongate, article 

 5 with slight posterior lobe; telson rounded. Species: 3, W. Africa, 

 N. Pacific temperate, littoral. 



