USGS Home
Contact USGS
Search USGS
Science Topics
Maps, Imagery, and Publications
Hazards
Newsroom
Education
Jobs
Partnerships
Library
About USGS
Podcasts/RSS
You are here:
Topics
>
Organisms
>
Animals
>
Invertebrates
>
Arthropods
Help
Trilobites
Extinct marine arthropods of the class Trilobita with segmented bodies and jointed appendages found as Paleozoic fossils in many parts of the world.
Subtopics:
(none)
Related topics:
Fossils
Invertebrate paleontology
Results 1 - 1 of 1 listed by similarity [
list alphabetically
]
Early Paleozoic biochronology of the Great Basin, western United States
[
New Window
]
Publication (PDF format) in three parts on the biostratigraphy and lithostratigraphy of the Ibexian Series in the North American Ordovician, with sections on the southern Egan Range, Nevada and the biostratigraphy of the eastern Great Basin.
Search USGS
Alphabetical Index of Topics
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
Find a topic in this index: