300 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 95 
Genus CREAGRUTUS Giinther 
Creagrutus GUNTHER, Catalogue of the fishes in the British Museum, vol. 5, 
p. 38389, 1864. (Type, Creagrutus muiillert Giinther=Leporinus miillert - 
(non Steindachner) Giinther, 1859.) 
Although Higenmann revised this genus in 1927 and Myers in the 
same year split off the genus Creagrudite, considerable work needs to 
be done on these genera before they are well understood. In fact, I 
cast serious doubt on the distinctness of Creagrudite from Creagrutus 
but am unable to reach a definite conclusion at this time because of 
lack of specimens. Most of the specimens from Venezuela have the 
teeth in the upper jaws arranged as shown in figure 48, but there is 
some variation. 
KEY TO THE SPECIES OF CREAGRUTUS FROM VENEZUELA 
la. A black spot at base of middle rays of caudal fin, pigment not embedded; 
humeral bar, usually with intensification of blackish pigment at midaxis, 
this bar not crescent shaped; dorsal origin over or a little in front of a 
vertical line through pelvic insertion; usually 10 scales (occasionally 9 
and 11) between dorsal origin and tip of supraoccipital process; anal rays 
iii, 10 to iii, 12; depth 3% to 3% and head 3% to 3%, in standard length; 
eye 3 to 3% in head; when alive dorsal side of eye reddish. — 
Creagrutus hildebrandi, new species 
1b. No black pigment spot at base of midcaudal fin rays. 
2a. Humeral bar crescent-shaped, with concavity anteriorly 78; adipose origin 
over base of last dorsal ray; scales 37 or 38; anal rays iii, 9 or iii, 10. 
3a. Head 4%, depth 4%, in standard length; dorsal origin directly over pelvic 
insertion; anal origin under tips of depressed last dorsal ray; second 
suborbital equals eye; crescent-shaped humeral bar over a black 
humeral spot; anal 11 (probably iii, 10) _.Creagrutus phasma Myers 
3b. Head 3% to 4, depth 34 to 4 in standard length; dorsal origin directly 
over to a little in front of pelvic insertion; anal origin under a third to 
a half of the way out depressed last dorsal’ray; width of second subor- 
bital equals % eye; no black spot in crescent-shaped humeral bar; anal 
rays iil, 9, rarely iii, 8 or iii, 1O______-_ Creagrutus bolivari, new species 
2b. Humeral bar not crescent-shaped; head 3% to 4, depth 3 to 3%, in standard 
length; anal rays iii, 10 or iii, 11, occasionally iii, 12; usually 11 scales in 
front of dorsal origin; adipose origin over a vertical through half the way 
out depressed last anal ray; origin of dorsal usually a little behind or 
sometimes over pelvic insertions; dorsal origin an equal distance be- 
tween snout tip and one-fourth to one-third eye diameter behind adipose 
GYD sey VAIN Dh AUS TEEN tl a eg Creagrutus beni HKigenmann 
CREAGRUTUS HILDEBRANDI, new species 
Figures 47, 48 
Holotype.—U.S.N.M. No. 121482, a specimen 50 mm. in standard 
length, taken by Leonard P. Schultz, April 1, 1942, in the Rio Tachira, 
7 km. north of San Antonio, Catatumbo system, Venezuela. 
28 The shape of the humeral bar and elongate shape of the body are very similar to pl. 45, fig. 1, Mem. Car= 
negie Mus., vol. 5, 1912 and pl. 34, fig. 2, Mem. Mus. Comp. Zool., vol. 43, pt. 4, 1927, both of Creagrutus 
melanzonus. 
