MARINE GAMMARIDEAN AMPHIPODA 



475 



Genera of Thaumatelsonidae 



Prothaumatelson Schellenberg 



Prothaumatelson Schellenberg, 1931. — Gurjanova, 1938. 



Type-species: Thaumatelson nasutum Chevreux, 1912a; 1912b 

 (monotypy). 

 Species: 2, bipolar, littoral. 



Pseudothaumatelson Schellenberg 



Pseudothaumatelson Schellenberg, 1931. — Gurjanova, 1938. 

 Parathaumatelson Gurjanova, 1938. 



Type-species: P. patagonicum Schellenberg, 1931 (present selec- 

 tion) . 



Species: 3, subantarctic, littoral. 



Figure 171. — Thaumatelsonidae: Mouthparts, Thaumatelson herdmani Walker (1907): 

 a, mandible; b,c, maxillae 1, 2; d, maxilliped. Prothaumatelson nasutum (Chevreux, 

 1912b): e, maxilHped. Gnathopod 1:/, Thaumatelson walkeri Chilton (1912b); g, Pro- 

 thaumatelson carinatum Shoemaker (1955). Gnathopod 2: h, Thaumatelson herdmani; 

 i, Thaumatelson walkeri; j, Prothaumatelson carinatum. Uropod 3: k, Prothaumatelson 

 nasutum. Urosome and pleonite 3, urosomites coalesced, bearing 3 uropods and large 

 telson: /, Thaumatelson walkeri. 



285-135 O - 69 - 31 



