Data from: Ankylosaurian body armor function and evolution with insights from osteohistology and morphometrics of new specimens from the Late Cretaceous of Antarctica ...
The body armor of ankylosaurians is a unique morphological feature among dinosaurs. Despite being studied for decades, paleohistological analyses have only started to uncover the details of its function. Yet, there has been an overall bias toward sampling ankylosaurian remains from the Northern Hemi...
| Main Authors: | , , , , , , |
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| Format: | Dataset |
| Language: | English |
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Dryad
2023
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5061/dryad.ht76hdrkx https://datadryad.org/stash/dataset/doi:10.5061/dryad.ht76hdrkx |
| Summary: | The body armor of ankylosaurians is a unique morphological feature among dinosaurs. Despite being studied for decades, paleohistological analyses have only started to uncover the details of its function. Yet, there has been an overall bias toward sampling ankylosaurian remains from the Northern Hemisphere and limited quantitative studies on the morphological and functional evolution. Here, we describe new ankylosaurian materials recovered from the Late Cretaceous of Antarctica that, in combination with data compiled from the literature, reveal new insights into the evolution of the ankylosaurian body armor. Based on histological microstructure and phylogenetic results, the new Antarctic material can be assigned to Nodosauridae. This group shares the absence/poor development of the basal cortex and highly ordered sets of orthogonal structural fibers in the superficial cortex. Our morphospace analyses indicate that large morphological diversity is observed among both nodosaurids and ankylosaurids, but they ... : Material The figures of specimens CAV-4 and 5 before the paleohistological sections are available in Supplementary Fig. 1. There is no figure for the specimen CAV-10. Statistical Analyses The dataset compiled from the literature for our linear morphometric analyses is available in the file “Dataset_osteoderms.xlsx”. The compiled specimens are listed in Table 1. The entire dataset of PAST files to osteoderms is available in “Dataset_osteoderms.dat”. The abbreviations and description of variables used in both datasets are: B, thickness of the osteoderm basal cortex; BI, basal index (BI = 100B/T); CI, cortical index (CI = 100*(S + B)/T); Co, thickness of the osteoderm core; CoI, core index (CoI = 100Co/T); Group, main group that the specimens are assigned (Ankylosauridae, Nodosauridae or Titanosauria); Osteoderm, shape of the osteoderm; Group+osteodem, classification joining main group and shape of osteoderm; S, thickness of the osteoderm superficial cortex; S+B, sum of osteoderm superficial and basal cortex ... |
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