
The order Bransonelliformes is erected for the genera <i>Bransonella</i> Harlton, 1933 and <i>Barbclabornia</i> Johnson, 2003 based on the distinct characters of an inverted "V"-nested pattern of ornamentation preliminary on the labial aspect at the tooth cusps, the presence of labial foramina, and the occasional occurrence of a centrally positioned lingual opening of a main nutrient canal at the bases of the teeth. The Bransonelliformes comprises the primitive sister group to the Xenacanthiformes within the Xenacanthimorpha. <br><br> Für die Gattungen <i>Bransonella</i> Harlton, 1933 und <i>Barbclabornia</i> Johnson, 2003 wird die neue Ordnung Bransonelliformes eingeführt basierend auf den Merkmalen von bevorzugt auf der labialen Seite der Zahnspitzen auftretenden, dachziegelartig ineinander geschachtelten Skulpturleisten, dem Vorhandensein labialer Foramina sowie dem häufigen Auftreten einer größeren lingualen Öffnung an der Zahnbasis, dem Durchtritt eines zentralen Nährkanals. Die Bransonelliformes stellen die ursprünglichere Schwestergruppe zu den Xenacanthiformes innerhalb der Xenacanthimorpha dar. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.200700005" target="_blank">10.1002/mmng.200700005</a>
Paleontology, QE701-760
Paleontology, QE701-760
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