Threadfins from the Eastern Pacific— Klawe and Alverson 
169 
TABLE 2 
Location, Number, Size-Range, and Date of Capture of P. opefcularis and 
P. approximans BY SCIENTIFIC PERSONNEL 
DATE 
LOCATION 
Lat. N Long. W 
NO. OF 
SPECI- 
MENS 
SIZE-RANGE 
(mm) * 
COLLECTOR OR REFERENCE 
Polydactylus opercularis 
1946 
5° 52.3' S 
81° 28.3' 
1 
p 
Hildebrand (1946) 
p 
8 ° 16' 
79° 37' 
1 
87.0 
USNM No. 41218 
1 8— III— 5 1 
13° 49' 
9i° or 
3 
25.0-29.0 
USNM No. 181258 
24-111-54 
Galapagos Is., Ecuador 
1 
25.0 
USNM No. 181257 
14-IV-54 
11 ° 43' 
87° 12' 
4 
30.0-49.0 
USNM No. 181262 
l-XI-55 
9° 35' 
86 ° 17' 
1 
27.0 
M. B. Schaefer & B. M. Shimada 
6-XI-55 
9° 12 ' 
87° 06' 
1 
32.5 
A. Ebling 
2-XII-55 
11 ° 48' 
88 ° 25' 
7 
3.0-25.5 
B. M. Shimada 
16-1-56 
5° 27' S 
81° 27' 
1 
37.5 
G. C. Broadhead & G. W. Bane 
4— II— 5 6 
18° 02 ' 
104° 02 ' 
1 
58.0 
J. A. Renner & R. Hark 
11-111-56 
21 ° 05' 
106° 43' 
10 
28.0-39.0 
C. J. Orange 
11-111-56 
21 ° 05' 
106 ° 43' 
92 
25.0-65.0 
C. J. Orange 
25-IV-56 
12 ° 08' 
88 ° 12 ' 
5 
18.0-28.0 
? 
9-V-56 
16 ° 16 ' 
100 ° 19' 
2 
20.0-24.0 
USNM No. 181254 
11 -VI-5 6 
SE Is. Cleopha, Tres Marias 
1 
20.0 
USNM No. 181274 
4-XI-56 
20 ° 53' 
106° 28' 
1 
44.0 
Fish & Wildlife Service 
4— II— 57 
18° 02 ' 
104° 02' 
1 
57.0 
J. A. Renner & R. Hark 
13-11-57 
22 ° 26' 
106 ° 06' 
48 
21.0-53.0 
J. A. Renner & R. Hark 
9-IV-57 
12 ° 22 ' 
87° 39' 
7 
18.5-39.5 
C. J. Orange 
17-IV-57 
12° 57' 
89° 55' 
3 
38.0-40.0 
C. J. Orange & P. N. Sund 
18-IV-57 
3° 03' 
89° 52' 
40 
21.0-51.5 
C. J. Orange & P. N. Sund 
23-IV-57 
6 ° 36' 
78° 14' 
4 
17.0-23.0 
W. L. Klawe 
16- VI-5 7 
6 ° 18' 
77° 47' 
3 
26.5-42.5 
F. M. Larmie & R. Kirschman 
10-VI-58 
0 ° 22 ' S 
80° 50' 
4 
15.0-19.1 
C. L. Peterson & R. Hetzler 
ll-VI-58 
17° 36.5' 
102 ° 23' 
1 
32.0 
W. L. Klawe 
15- Vi-5 8 
21 ° 37' 
106° 31.5' 
4 
7.0-21.0 
W. L. Klawe 
18 -VI-58 
0 ° 22 ' S 
80° 50' 
4 
16 . 0 - 29.0 
C. L. Peterson & R. Hetzler 
22 -VI -58 
2° 01'S 
81 ° or 
2 
21 . 0 , 22.0 
C. L. Peterson & R. Hetzler 
■ j— II— 59 
12 ° 41' 
9 1° 35 ' 
1 
30.0 
R. C. Hennemuth 
14-11-59 
15° 00 ' 
93° 00 ' 
3 
44.0,45.0,46.0 
P. N. Sund 
19— III— 59 
23° 55' 
108° 00 ' 
9 
24.5-27.5 
p 
10-XI-59 
18° 56' 
104° 10 ' 
1 
43.0 
p 
22-III-60 
20 ° 34' 
105° 54' 
6 
16.5-32.5 
IATTC tagging cruise 
20 -VI I -60 
9 ° 21 ' 
85° 07' 
1 
22 . 0 , 
H. Sobrado 
21-VII-60 
9° 21 ' 
85° 07' 
1 
10.0 
H. Sobrado 
14- IV -61 
19° 06' 
105° 19' 
9 
20.5-31.5 
F. J. Hester & R. R. Whitney 
2 5—2 6 — III— 62 
11 ° 34.4' 
87° 00' 
1 
19.0 
W. L. Klawe 
27-111-62 
10 ° 24' 
85° 53' 
1 
28. 0 
W. L. Klawe 
? 
6 ° 46' 
78° 00' 
1 
34.0 
R. C. Griffiths & D. R. Pruden 
Polydactylus approximans 
VIII-07 
Taboga Is., Panama 
1 
27.0 
USNM No. 62925 
VII- 12 
Chame Pt., Panama 
2 
30.0, 32.0 
USNM No. 82027 
8— III— 1 3 
Chame Pt., Panama 
3 
20.0-37.0 
USNM No. 82195 
26-VII-13 
Chame Pt., Panama 
20 + 
22 . 0 - 110.0 
USNM No. 82193 
? 1913 
Chame Pt., Panama 
1 
55.0 
USNM No. 82194 
1946 
5° 52.3' S 81° 28.3' 
1 
? 
Hildebrand (1946) 
* Fish measured from tip to snout to the shortest median ray in caudal fin. 
