provided by Zookeys
CAMSM B54855 consists of a fragment of the posterior portion of the mandibular symphysis. Seeley (1870) described the mandible as narrow, with parallel alveolar margins, deep mandibular sulcus, spacing between alveoli equal to the size of their diameters, and with the lateral margins forming a sharp keel, which Unwin (2001) interpreted as a dentary crest. Seeley (1870) mentioned the presence of a suture with the angular bone, which would almost reach the tip of the mandible, as a unique character for this species in comparison to the pterosaurs from Germany. We here interpret this structure as the posterior margin of a dentary crest rather than a suture.
In addition to a deep mandibular groove, CAMSM B54855 shares with Lonchodraco giganteus small and well–spaced alveoli, without significant size variation. However, it differs from this species in having straight alveolar margins in dorsal view (Seeley 1870), whereas the margins diverge in Lonchodraco giganteus. The mandibular crest of Lonchodraco machaerorhynchus is deep and its apex coincident with its terminus, with a ventral depression posterior to it. In Lonchodraco giganteus, the mandibular crest is short and blade–like, being more restricted to the length of the symphysis; the presence of a depression cannot be determined.
- Taissa Rodrigues, Alexander Wilhelm Armin Kellner
- bibliographic citation
- Rodrigues T, Kellner A (2013) Taxonomic review of the Ornithocheirus complex (Pterosauria) from the Cretaceous of England ZooKeys 308: 1–112
- Taissa Rodrigues
- Alexander Wilhelm Armin Kellner