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9) 
FISHES OF WESTERN SOUTH AMERICA 
Pimelotropis Gill, 1859, Proc. Acad. Nat. Sci. Phila., 196, lateralis = macropterus. 
Pseudocallophysus Bleeker, 1863, Nederl. Tijdsch. Dierk., I, 102, ctenodus = macropterus. 
Type: Pimelodus macropterus Lichtenstein 
The Amazons northward 
Only one series of teeth in lower jaw, two in the upper, the inner much the 
smaller and more or less concealed; first dorsal and pectoral rays not spine-like nor 
longer than the following rays; adipose long and narrow; wedge-shaped fontanel 
between the eyes and a circular one at the base of the occipital crest. 
10. CALLOPHYSUS MACROPTERUS (Lichtenstein) 
Pimelodus macropterus Lichtenstein, 1819, Wiede. Zool. Mag., I, iii, 59, Brazil. 
Callophysus macropterus Miller and Troschel in Schomburgk, 1848, Brit. Guiana, 629, Essequibo; 
Ginther, 1864, Cat. Fish. Brit. Mus., V, 137; 
Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 95; 
Kigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 382; 
EKigenmann, 1912, Mem. Carnegie Mus., V, 148; 
Fowler, 1939 (1940), Proc. Acad. Nat. Sei. Phila., XCI, 222, Contamana. 
Pimelotropis lateralis Gill, 1859, Proc. Acad. Nat. Sci. Phila., 196. 
Callophysus lateralis Giinther, 1864, Cat. Fish. Brit. Mus., V, 136; 
Steindachner, 1876, Sitzb. Kk. Akad. Wiss. Wien, LX XIV, 105, Tabatinga; 
Cope, 1878, Proc. Amer. Phil. Soc., XVII, 676, Peruvian Amazon; 
Regan, 1913, Ann. Mag. Nat. Hist., (8), XII, 281, Rio Ucayali. 
Pimelodus ctenodus Castelnau, 1855, Anim. Amér. Sud, Poiss., 35. 
Amazon valley northward to Caribbean 
Subfamily: PIMELODINAE 
That division of the family having a free union of gill-membranes and teeth 
in villiform bands. 
Genus 4: PIMELODINA Steindachner 
Pimelodina Steindachner, 1876, Sitzb. Kix. Akad. Wiss. Wien, LX XIV, 101; 
Bigenmann and Higenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 101; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 383. 
Type: Pimelodina flavipinnis Stemdachner 
Throughout Amazon valley 
A genus distinguished for its elongated, nearly conical snout projecting beyond 
lower jaw; teeth weak and in narrow bands; adipose fin long; dorsal and pectoral 
fins with first rays elongated and articulated; dorsal and anal fins emarginate. 
11. PIMELODINA FLAVIPINNIS Steindachner 
Pimelodina flavipinnis Steindachner, 1876, Sitzb. KK. Akad. Wiss. Wien, LXXIV, 102, pl. xii, 
fig. 2, Para; 
