

210 



other doradoids, the PCP of both Tetranematichthys and>4. fcrevij is very weak, 

 which I assume is a derived condition relative to outgroups, but primitive with 

 respect to other species of Ageneiosus. This reduction or loss of the PCP is 

 analogous to the absence of an adipose fin in some catfishes, such as in Helogenes, in 

 which both character states were observed to be present among individuals in the 

 same population (Vari and Ortega 1986). . ; • 



Material Examined 



Ii2e^laterial.-NMW 47801 (2, 95-104, syntypes of y4. fcrevis [see 

 designations above]), Coary (= Coari), Brazil. 



Bolivia . - Beni : AMNH 56069 (1, 63.2), Rio Mamore, Puerto Siles, 4 

 December 1965, S. Anderson. FMNH 58143 (holotype of ^4. madeirensis; probable 

 male, 102), San Joaquin, 6 September 1909, J. D. Haseman. FMNH 58144 (14 

 paratypes of ^4. madeirensis; 32.8-108.3 [1 c/s]), San Joaquin, 6 September 1909, J. 

 D. Haseman. MZUSP 27805 (2 males, 119.6-124.0; 3 females, 79.5-110.8), Laguna 

 San Jose, Trinidad, September 1983, Conv. Pise. ORSTOM-UTB. MZUSP 27818 

 (3, 51.2-69.0), canal San Greg6rio, Trinidad, September 1983, Conv. Pise. 

 ORSTOM-UTB. 



Brazil. - Amazonas : MCZ 7733 (1, 74.8), Coaiy (Thayer expedition), L. 

 Agassiz. MCZ 36190 (1, 93.5), Coary (Thayer expedition). MNRJ 962 (syntypes of 

 A. rondoni, 2 females, 134.4-160.4), Rio Negro at Manaus, 1908, A. Miranda- 

 Ribeiro. MZUSP 6998 (male, 59.0), Rio Madeira, 25 km below Nova de Olinda, 27 

 November 1967, EPA. MZUSP uncat. (3 males, 63.2-66.0; 1 female, 65.4), mouth of 

 Rio Ituxi, 22 December 1974, P. E. VanzoUni. MZUSP uncat. (1, 58.1), mouth of 

 Rio Paci^ 23 December 1974, P. E. Vanzolini. MZUSP uncat. (3, 47.5-49.8), Rio 

 Purus, Cassia, 3 January 1975, P. E. Vanzolini. MZUSP uncat. (1, 65.1), Rio Purus, 



