Plant-insect interaction on leaves of Bennettitales at the Middle Jurassic locality Cerro el Matador, Otlaltepec Formation (Puebla)
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Abstract
The Otlaltepec Formation outcropped in the south of the state of Puebla. It is characterized by the content of gymnospermae flora with low diversity, in which Bennettitales predominate. Given the state of preservation exhibited by fossils, they correspond to autochtonous components of the locality “Cerro el Matador”. Two types of plant-insect interactions represent the oldest record in Mexico to this date. Discontinuous feeding at the leaf’s margin is observed in both Otozamites and Zamites genera, the size being variable between the two of them. The second interaction is of the mining type and it is found in the same genera. However, the greatest number of temporal minings is located in Otozamites hespera and thus it is proposed that they were caused by a monophagous insect. It is important to emphasize that such interactions are rare in the Jurassic, but when they are observed, they are associated with Cycadophytes. In this study, the presence of two types of damage is observed on the same host.
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References
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