Devonian sharks from Antarctica 
297 
Figure 8 A-I, Aztccodus harmseme gen. et sp. nov. A-E, Holotype (actual tooth) WAM 92.3.61, from Lashly Range 
(LA-2 site), in A, labial, B, lateral, C, lingual, D, basal and E, dorsal views, x5. F, WAM 92.3.71, in labial 
view, from Fault Bluff ("fish hotel" B horizon), x5. G, 92.3.70, (from LA-2), x5. H, 92.3.59, labial view, from 
Alligator Ridge (locality 20, top), x4.1, WAM 92,3.58, labial view, from Alligator Ridge (locality 21, top) x4. 
J, K, Amreodus slatei gen. et sp. nov. J, WAM 94.2.9, labial view, x8. K, 94.2.13, Holotype, labial view, both 
from Fault Bluff ("fish hotel" B horizon), x 8. A-G are actual specimens, others are latex peels; all specimens 
whitened with ammonium chloride. 
unequal size of cusps, and the lack of striae on 
cusps clearly distinguish this genus from the teeth 
of Antarctilamna. No other Palaeozoic shark has 
widely separated divergent cusps with a well- 
developed mesial crenulated region. As originally 
described (Young 1982: 835), this tooth type 
resembles Mcmurdodus in its elongate compressed 
form, with minor cusps at the margins of the tooth. 
