A unique, large-sized stem Odonata (Insecta) found in the early Pennsylvanian of New Brunswick (Canada)
<p>A stem relative of dragon- and damselflies, <i>Brunellopteron norradi</i> Béthoux, Deregnaucourt and Norrad gen. et sp. nov., is documented based on a specimen found at Robertson Point (Grand Lake, New Brunswick, Canada; Sunbury Creek Formation; early Moscovian, Pennsylvanian) a...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Pensoft Publishers
2021-07-01
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| Series: | Fossil Record |
| Online Access: | https://fr.copernicus.org/articles/24/207/2021/fr-24-207-2021.pdf |
| Summary: | <p>A stem relative of dragon- and damselflies,
<i>Brunellopteron norradi</i> Béthoux, Deregnaucourt and Norrad gen. et sp. nov., is documented
based on a specimen found at Robertson Point (Grand Lake, New Brunswick,
Canada; Sunbury Creek Formation; early Moscovian, Pennsylvanian) and
preserving the basal half of a hindwing. A comparative analysis of the
evolution of wing venation in early odonates demonstrates that it belongs to
a still poorly documented subset of species. Specifically, it displays a
MP <span class="inline-formula">+</span> CuA fusion, a CuA <span class="inline-formula">+</span> CuP fusion, and a CuP <span class="inline-formula">+</span> AA fusion, but it lacks the
“extended” MP <span class="inline-formula">+</span> Cu <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M5" display="inline" overflow="scroll" dspmath="mathml"><mo>/</mo></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="8pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="93e47eb16cb371fe6916d3191efc4f1d"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="fr-24-207-2021-ie00001.svg" width="8pt" height="14pt" src="fr-24-207-2021-ie00001.png"/></svg:svg></span></span> CuA fusion and the “extended” (CuP <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M6" display="inline" overflow="scroll" dspmath="mathml"><mo>/</mo></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="8pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="073414a2b77546d8d5847ae97897d626"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="fr-24-207-2021-ie00002.svg" width="8pt" height="14pt" src="fr-24-207-2021-ie00002.png"/></svg:svg></span></span> CuA <span class="inline-formula">+</span> CuP) <span class="inline-formula">+</span> AA fusion,
the occurrence of which is typical of most Odonata, including <i>Meganeura</i>-like species. The
occurrence of intercalary veins suggests that its closest relative might be
<i>Gallotypus oudardi</i> Nel, Garrouste and Roques, 2008, from the Moscovian of northern France.</p> |
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| ISSN: | 2193-0066 2193-0074 |