Apteronotus caudimaculosus n. sp. (Gymnotiformes: Apteronotidae), a sexually dimorphic black ghost knifefish from the Pantanal, Western Brazil, with a note on the monophyly of the A. albifrons species complex. Carlos David de Santana Zootaxa 2003 252 1 11 FYS4 Actinopterygii Apteronotidae Apteronotus Animalia Gymnotiformes 10 Chordata species rostratus    Colombia- CAS72124 [IU 13374], 1 ex.;  FMNH71201, 3 ex.;  USNM317229, 3 ex.;  USNM324044, 1 ex.;  USNM317230, 1 ex.;  Panama- AUM31623, 1 ex.;  FMNH7592, holotype;  USNM324045, 2 ex.;  Venezuela- INHS34978, 1 ex.;  INHS35364, 16 ex.;  INHS35443, 1 ex.;  INHS59949, 1 ex.;  INHS59885, 1 ex.;  INHS60284, 6 ex.;  INHS60468, 1 ex.;  MCZ48686, 2 ex.;.  MCZ 121595, 6 ex.;  USNM 121593, 3 ex.; 923903416 Colombia 923903412 Colombia 923903420 Colombia 923903401 Colombia 923903423 Colombia 923903429 Panama 923903418 Panama 923903422 Panama 923903427 Venezuela 923903405 Venezuela 923903426 Venezuela 923903435 Venezuela 923903421 Venezuela 923903431 Venezuela 923903428 Venezuela 923903434 Venezuela 923903441 Venezuela 923903430 Venezuela