Pentagnostus facts for kids
Quick facts for kids Pentagnostus |
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| Pentagnostus brighamensis, 6mm, Spence Formation | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| Order: |
Agnostida
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| Suborder: |
Agnostina
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| Superfamily: |
Agnostoidea
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| Family: |
Peronopsidae
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| Genus: |
Pentagnostus
Lermontova, 1940
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| subgenera | |
and see text for species |
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Pentagnostus is a type of ancient sea creature called a trilobite. These small animals lived only during the Middle Cambrian period, which was about 500 million years ago. Their fossil remains have been found in many places around the world. These include Siberia, Australia, North America, Scandinavia, and Kazakhstan.
Contents
What is Pentagnostus?
Pentagnostus is a specific group, or genus, of trilobites. Trilobites were a very successful group of Arthropods. They lived in the oceans for millions of years. Pentagnostus was a small trilobite, often only a few millimeters long.
Scientists believe that an older trilobite called Archaeagnostus was the ancestor of Pentagnostus. This means Archaeagnostus came before Pentagnostus in the family tree.
Types of Pentagnostus
There are two main groups, or subgenera, within Pentagnostus. Scientists call these Pentagnostus (Pentagnostus) and Pentagnostus (Meragnostus).
The first group, Pentagnostus (Pentagnostus), appeared earlier in time. Over time, this group changed and developed. It eventually led to the second group, Pentagnostus (Meragnostus). It also led to another family of trilobites called Ptychagnostidae.
Species of Pentagnostus (Pentagnostus)
Here are some of the known species in this group:
- P. anabarensis
- P. ademptus
- P. brighamensis
- P. shergouldi
- P. veles
Species of Pentagnostus (Meragnostus)
Here are some of the known species in this group:
- P. bonnerensis
- P. bulkurensis
- P. remotus
- P. segmentus
- P. shabactensis
