Chordata: Vertebrata: Lampreys: Heterostraci: Osteostraci: Gnathostomata: Placodermi: Chondrichthyes: Actinopterygii: Teleostei: Sarcopterygii: Tiktaalik: Ichthyostega: Tetrapoda: Lissamphibia: MYA 4600 4000 T 2500 Had Arc Pro Precambrian 440 420 Cm OSD Paleozoic 320 300 25 200 14 Ms Pn P Tr JK C 56 34 23 Pa E O Paleogene Mesozoic Phanerozoic 5.3 2.6 0.01 M Pli Pls H Neogene Cenozoic Tertiary present A Quaternary

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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Draw a line above the geologic time scale below to mark the age range for each clade.
**Evolutionary Timeline of Vertebrates and Related Groups**

This timeline illustrates the appearance of various vertebrate groups throughout Earth's history, plotted against geologic time periods. It outlines the emergence of key groups along a chronological scale measured in millions of years ago (MYA).

**Chart Explanation:**

- **Geologic Time Scale:** 
  - The timeline at the bottom is divided into eons, eras, and periods.
  - Eons include Precambrian and Phanerozoic, further subdivided into the eras: Paleozoic, Mesozoic, and Cenozoic.

**Eons and Eras:**
- **Precambrian (Had, Arc, Pro):**
  - Had (Hadean)
  - Arc (Archean)
  - Pro (Proterozoic) – up to 540 million years ago.

- **Phanerozoic (540 MYA to present):**
  - **Paleozoic Era:** 
    - Cm (Cambrian)
    - O (Ordovician)
    - S (Silurian)
    - D (Devonian)
    - Ms (Mississippian)
    - Pn (Pennsylvanian)
    - P (Permian)
  
  - **Mesozoic Era:**
    - Tr (Triassic)
    - J (Jurassic)
    - K (Cretaceous)

  - **Cenozoic Era:**
    - Paleogene:
      - Pa (Paleocene)
      - E (Eocene)
      - O (Oligocene)
    - Neogene:
      - M (Miocene)
      - Pli (Pliocene)
    - Quaternary:
      - Pls (Pleistocene)
      - H (Holocene)
      - A (Anthropocene – recent, not officially recognized)

**Groups and Their Appearance:**

Each group listed marks its first appearance on the timeline:

- **Chordata**
- **Vertebrata**
- **Lampreys**
- **Heterostraci**
- **Osteostraci**
- **Gnathostomata**
- **Placodermi**
- **Chondrichthyes**
- **Actinopterygii**
- **Teleostei**
- **Sarcopterygii**
- **Tiktaalik** (a transitional form between fish and tetrapods)
- **Ich
Transcribed Image Text:**Evolutionary Timeline of Vertebrates and Related Groups** This timeline illustrates the appearance of various vertebrate groups throughout Earth's history, plotted against geologic time periods. It outlines the emergence of key groups along a chronological scale measured in millions of years ago (MYA). **Chart Explanation:** - **Geologic Time Scale:** - The timeline at the bottom is divided into eons, eras, and periods. - Eons include Precambrian and Phanerozoic, further subdivided into the eras: Paleozoic, Mesozoic, and Cenozoic. **Eons and Eras:** - **Precambrian (Had, Arc, Pro):** - Had (Hadean) - Arc (Archean) - Pro (Proterozoic) – up to 540 million years ago. - **Phanerozoic (540 MYA to present):** - **Paleozoic Era:** - Cm (Cambrian) - O (Ordovician) - S (Silurian) - D (Devonian) - Ms (Mississippian) - Pn (Pennsylvanian) - P (Permian) - **Mesozoic Era:** - Tr (Triassic) - J (Jurassic) - K (Cretaceous) - **Cenozoic Era:** - Paleogene: - Pa (Paleocene) - E (Eocene) - O (Oligocene) - Neogene: - M (Miocene) - Pli (Pliocene) - Quaternary: - Pls (Pleistocene) - H (Holocene) - A (Anthropocene – recent, not officially recognized) **Groups and Their Appearance:** Each group listed marks its first appearance on the timeline: - **Chordata** - **Vertebrata** - **Lampreys** - **Heterostraci** - **Osteostraci** - **Gnathostomata** - **Placodermi** - **Chondrichthyes** - **Actinopterygii** - **Teleostei** - **Sarcopterygii** - **Tiktaalik** (a transitional form between fish and tetrapods) - **Ich
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