Data from: The hatching mechanism of 130-million-year-old insects: an association of neonates, egg shells and egg bursters in Lebanese amber
Pérez-de la Fuente, Ricardo, Oxford University Museum of Natural History
Engel, Michael S., American Museum of Natural History, University of Kansas
Azar, Dany, Institute of Geology, Lebanese University
Peñalver, Enrique, Instituto Geológico y Minero de España
Published Dec 20, 2018 on Dryad.
Cite this dataset
Pérez-de la Fuente, Ricardo; Engel, Michael S.; Azar, Dany; Peñalver, Enrique (2018). Data from: The hatching mechanism of 130-million-year-old insects: an association of neonates, egg shells and egg bursters in Lebanese amber [Dataset]. Dryad. https://doi.org/10.5061/dryad.bd203r4
Hatching is a pivotal moment in the life of most animals. Diverse chemical, behavioural and mechanical methods have evolved in metazoans to break the egg membranes. Among them, many arthropod and vertebrate embryos hatch using ephemeral, frequently convergent structures known as egg bursters. However, the evolutionary processes by which hatching mechanisms and related embryonic structures became established in deep time are poorly understood due to a nearly complete absence from the fossil record. Herein we describe an exceptional c. 130‐million‐year‐old association in Lebanese amber composed of multiple neonate green lacewing larvae, Tragichrysa ovoruptora gen. et sp. nov. (Neuroptera, Chrysopoidea), and conspecific egg remains. Egg bursters with a serrated blade bearing a short process are attached to three longitudinally split egg shells. Embryos of extant green lacewing relatives (Chrysopidae) utilize this egg burster morphotype to open a vertical slit on the egg, after which the burster is moulted and left joined to the empty egg shell. Additionally, the new larval species has extremely elongate dorsal tubercles, an adaptation to carry exogenous debris for protection and camouflage also known from other Cretaceous chrysopoids but absent in modern relatives. The present discovery demonstrates that the hatching mechanism of modern green lacewings was established in the chrysopoid lineage by the Early Cretaceous and proves through direct fossil evidence how some morphological traits related to hatching and linked behaviours, at least in insect embryos, have been subject to a high degree of evolutionary conservatism.
Supporting Information for "The hatching mechanism of 130-million-year-old insects: an association of neonates, egg shells, and egg bursters in Lebanese amber"
This Supporting Information document contains a single Supplementary File including Supplementary Text (“Review on egg bursters” and “Extended data for Figure 6”), Supplementary Table 1 (“Morphological features of the egg in extant neuropterid taxa”), and Supplementary References.
Supporting Information for The hatching mechanism of 130-million-year-old insects an association of neonates, egg shells, and egg bursters in Lebanese amber.docx