Introduction to Paleobiology and the Fossil Record

PROTISTS 215
Allogromia
R
freshwater
M
R
T
M
R
T
Ammonia
Quinqueloculina Triloculina
M M M
Cibicides
T
R
Reophax
T
normal marine
lagoons and
carbonate platforms
R
Discoris
T
hypersaline lagoons
Miliolina
100%
90
80
10
70
60
50
40
30
20
10
20
30
40
50
60
70
80
90
10
20
40
30
60
50
80
70
90
100%
100%
Rotaliina Textulariina
most shelf seas
brackish lagoons
and estuaries
spinose planktonics
Globigerinoides
Globorotalia
100 m
shelf (neritic)
relative abundance of
planktonic foraminifera
keeled planktonics
bathyal
relative abundance of benthic Foraminifera on the sea floor
% calcareous benthic forms
0 m
50 m
100 m
3000 m
abyssal
% planktonics (Globigerinacea)
maximum diversity of calcareous
benthic forms
200 m
maximum diversity of
agglutinated forms
% agglutinated forms
3000 m
Figure 9.7 Foram test and environments: distribution of test types and genera of Foraminifera against environmental gradients.
(From Armstrong & Brasier 2005.)