Late Cenozoic Ostracodes — Holden 
3 
TABLE 1 
Species Check List of Late Cenozoic Hawaiian Ostracodes from the Hawaiian Islands, 
Clipperton Island, and Easter Island 
Relative abundances are made with reference to the total population: 0-5% rare (R) ; 5-15% common (C) ; 
15-40% abundant (A); 40-100% very abundant (VA). 
SPECIES 
EASTER ISL. 
HAWAIIAN ISLANDS 
EASTER ISL. 
CLIPPERTON 
ISL. 
INC O GENE 
RECENT 
EA-2 
T-l 
T-2 
T-4 
T— 7 
00 
iL 
T-ll 
T-l 2 
AR 
S-23 
T-l 3 
HA 
EA-I 
CL 
Cythereiioidea monodenticuiata n. sp. 
R 
Bairdia kauaiensis n. sp. 
A 
VA 
C 
A 
A 
VA 
A 
A 
A 
A 
L 
C 
Bairdia sp. 
R 
Bairdia hanaumaensis n. sp. 
R 
C 
R 
Bairdia ritugerda n. sp. 
C 
VA 
VA 
C 
C 
R 
Bairdia attenuate Brady, I860 
R 
R 
C 
R 
C 
C 
R 
Bairdia expansa Brady, 1880 
R 
1 
Macrocypris gracilis (Brady), 1890 
R 
C 
A 
A 
R 
Propontocypris simplex (Brady), 1880 
R 
R 
i 
d 
$ 
Mi 
1 
<c 
R 
I 
Bythoceratina monstruosa n. sp. 
C 
R 
R 
R 
Paracytheridea sp. 
R 
1 
Hemicythere obesa n. sp. 
R 
R 
Hemicythere sp. 
R 
R 
R 
| 
Mutiius (M.) oahuensis n. sp. 
A 
MutHusf?) coa/escens n. sp. 
C 
C 
Jagosocytheris venuiosus n. sp. 
R 
R 
Quadracythere hornibrooki n. sp. 
C 
R 
C 
Loxoconcha bati n. sp. 
R 
C 
C 
R 
R 
Loxoconcha condyta n. sp. 
1 
R 
R 
C 
R 
Loxoconcha Jongispina Key, 1953 
C 
C 
A 
R 
R 
Loxoconchetta honoiutiensis (Brady), 1880 
C 
C 
A 
R 
R 
Loxoconchetta a noma la (Brady), 1880 
R 
c 
R 
C 
C 
R 
Loxoconcha sp. 
R 
Paradoxostoma sp. A 
• | 
R 
Paradoxostoma sp. B 
R 
Para dostoma cf. P rubrum Muller, 1894 
c 
Sderochitus sp. A 
R 
— 
Sc/erochi/us sp. B 
R 
Cietocythereis bradyi n. sp. 
C 
R 
Hermanites sp. 
C 
Neocaudites terryi n. sp. 
1 
R 
1 
Xestoteberis nana Brady, I860 
I 
c 
A A 
A 
VA 
c 
C 
c 
C 
R 
R 
Anchistroche/es fumata Brady, 1890 
R 
“Cy there" caudate Brady, 1890 
1 
R 
R 
TOTAL NUMBER OF OSTRACODES 
110 
32 
14 
15 
45 
7 
49 
493 
34 
35 
63 
350 
60 
87 
reservations about the age assessment due, pri- 
marily, to the occurrence of Globorotalia trun- 
catulinoides. The sample from the deepest sta- 
tion of the present study, station S-23 from the 
north side of Kauai at 355 fathoms, contains 
many specimens of Globorotalia truncatuli- 
noides, which is considered to be of Pliocene to 
Recent age (Geiger, 1962; Todd, 1964). 
Station S-23, unlike the other stations, is lithol- 
ogically distinct, being composed of alternating 
fine beds of calcareous sand and volcanic ash; 
hence, the foraminifers obtained from the sand 
are contemporaneous with deposition. The lack 
of Miocene and older foraminifers also sug- 
gests that the terraces are probably no older 
than' Pliocene. Unfortunately, a definite age 
cannot be assigned at present to any of the 
terraces, and all must be considered here as 
Neogene to possibly Pleistocene, or late Ceno- 
zoic. 
Ostracodes previously described and dealt 
with here are mostly South Pacific forms. All 
are found living at depths far shallower than 
the present depths of the terraces. Information 
concerning ostracodes with known depth distri- 
butions is summarized in Table 2. It is interest- 
ing to note that most have been found exclu- 
sively in water shallower than 50 fathoms. 
None of the Recent ostracodes from the 
drowned terraces are deep water forms ; all 
occur in water less than 160 fathoms deep, with 
the exception of a single valve of Bairidia at- 
tenuata from 370 fathoms off the west coast of 
Africa (Egger, 1901). Unfortunately, very 
