■•,:;,v';v, ■ ■■ ; v._/: , . - ■ ,,.- 311 



of ichthyofaunal endemism, amd A. polystictus can be added to the preliminary list of 

 species compiled by Goulding et al. (1988:99). At present it is impossible to 

 speculate about any ecological factors that ]iTmtA.pofystictus to this blackwater 

 system, or prevent it from dispersing into the main Amazon river channel or 

 Whitewater tributaries. 



Etymolo g y : ,^ \\ '^'^-^ ., - 



From the Greek poly, neuter singular oi polys, meaning many, and stiktos, 

 meaning dotted, in reference to the characteristic spotted pigmentation pattern of 



tnis species. ■ rr-- '■ ■; "^"^t f'^;. ■v- t t'i**'<. 



. ' \'-^ -^ •<^-.' j1 '* *■■"' ''''■■ 



■ ■■ ■ '-.■' '■,-,'/■ 



Material Examined f^fV'^'fr^^ C ^^^ 



Typg Material. -HplotypQ: NMW 47839 (male, 185), mouth of Rio Negro, J. 

 D. Haseman. 



Brazn. -Amazonas: MZUSP 6160 (female, 255), Rio Negro, above Manaus, 

 22-25 April 1967, EPA. MZUSP 6200 (male, 345), Ig. Jaraqui, m. esq. do Rio 

 Negro, above Manaus, 22-24 April 1967, EPA. MZUSP uncat. (MG 27249-27251; 3 

 males, 210-230), Rio Dara^ cataract of Aracii, 10 February 1979, M. Goulding. 

 MZUSP uncat. (MG 27264; female, 385), confluence of Rio Negro and Rio 

 Marauia, 27 May 1979, M. Goulding. MZUSP uncat. (MG 27265-27267; 3 females, 

 285-310), Rio Negro, Anavilhanas, Igapb, July 1980, M. Goulding. MZUSP uncat. 

 (MG 27268; female, 270), Rio Negro, Anavilhanas, September 1980, M. Goulding. 

 MZUSP uncat. (MG 27269; male, 230), Rio Negro at confluence with Rio Arirard, 8 

 October 1979, M. Goulding. MZUSP uncat. (MG 27270; female, 360), Rio Negro, 

 Anavilhanas, Igap6, July 1980, M. Goulding. MZUSP uncat. (MG 27273; male, 



