Occurrences by Geologic Period
Classification Summary
By Phylum
| NO_PHYLUM_SPECIFIED |
198
|
| Rhodophyta |
161
|
| Pteridophyta |
113
|
| Pteridospermophyta |
103
|
| Tracheophyta |
77
|
| Chlorophyta |
76
|
| Psilophytophyta |
63
|
| Lycophyta |
41
|
| Ginkgophyta |
29
|
| Coniferophyta |
21
|
| Lycopodophyta |
20
|
| Gymnospermae |
17
|
| Spermatophyta |
10
|
| Sphenophyta |
10
|
| Equisetophyta |
8
|
| Cycadophyta |
6
|
| Bryophyta |
5
|
| Peltaspermophyta |
5
|
| Lycopodiophyta |
2
|
| Charophyta |
2
|
| Angiospermae |
1
|
| Zosterophyllophyta |
1
|
| Embryophyta |
1
|
By Class
| NO_CLASS_SPECIFIED |
550
|
| Rhodophyceae |
78
|
| Chlorophyceae |
54
|
| Psilophytopsida |
40
|
| Polypodiopsida |
31
|
| Gymnospermopsida |
30
|
| Ginkgoopsida |
29
|
| Florideophyceae |
24
|
| Pteropsida |
18
|
| Chuariophyceae |
15
|
| Algae |
12
|
| Lycopsida |
12
|
| Cladoxylopsida |
11
|
| Sphenopsida |
10
|
| Pteridopsida |
8
|
| Equisetopsida |
8
|
| Ulvophyceae |
6
|
| Cycadopsida |
6
|
| Pinopsida |
5
|
| Lycopodiopsida |
2
|
| Peltaspermopsida |
2
|
| Dicotyledoneae |
1
|
| Charophyceae |
1
|
| Rhyniopsida |
1
|
| Cordaitopsida |
1
|
| Lyginopteridopsida |
1
|