![Confirmation of Romer's Gap as a low oxygen interval constraining the timing of initial arthropod and vertebrate terrestrialization | PNAS Confirmation of Romer's Gap as a low oxygen interval constraining the timing of initial arthropod and vertebrate terrestrialization | PNAS](https://www.pnas.org/content/pnas/103/45/16818/F2.large.jpg)
Confirmation of Romer's Gap as a low oxygen interval constraining the timing of initial arthropod and vertebrate terrestrialization | PNAS
![Figure 2 from Confirmation of Romer's Gap as a low oxygen interval constraining the timing of initial arthropod and vertebrate terrestrialization | Semantic Scholar Figure 2 from Confirmation of Romer's Gap as a low oxygen interval constraining the timing of initial arthropod and vertebrate terrestrialization | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/b0be813185f69bfccc4387a1b1d9ff5c4ee332c1/4-Figure2-1.png)
Figure 2 from Confirmation of Romer's Gap as a low oxygen interval constraining the timing of initial arthropod and vertebrate terrestrialization | Semantic Scholar
![A fish and tetrapod fauna from Romer's Gap preserved in Scottish Tournaisian floodplain deposits - Otoo - 2019 - Palaeontology - Wiley Online Library A fish and tetrapod fauna from Romer's Gap preserved in Scottish Tournaisian floodplain deposits - Otoo - 2019 - Palaeontology - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/63bcba4d-185a-4fad-911d-d5d5ad476d1c/pala12395-fig-0005-m.jpg)