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Diffusible iodine‐based contrast‐enhanced computed tomography (diceCT): an emerging tool for rapid, high‐resolution, 3‐D imaging of metazoan soft tissues
TLDR
A critical review of the recent contributions to iodine‐based, contrast‐enhanced CT research is provided to enable researchers just beginning to employ contrast enhancement to make sense of this complex new landscape of methodologies.
Linking the evolution of body shape and locomotor biomechanics in bird-line archosaurs
TLDR
Digital body reconstructions are used to quantify evolutionary trends in locomotor biomechanics (whole-body proportions and centre-of-mass position) across the clade Archosauria and suggest that the evolution of avian flight is linked to anatomical novelties in the pelvic limb as well as the pectoral.
A new small enantiornithine bird from the Jehol Biota, with implications for early evolution of avian skull morphology
TLDR
The results indicate that the quadratojugal is an inverted L-shaped element, morphologically similar to that of more basal birds Archaeopteryx bavarica, Jeholornis prima, Confuciusornis sanctus and Sapeornis chaoyangensis, contributing to the refinement of the cranial kinesis in early birds.
A New Specimen of Large-Bodied Basal Enantiornithine Bohaiornis from the Early Cretaceous of China and the Inference of Feeding Ecology in Mesozoic Birds
TLDR
It is hypothesized that cranial morphology as well as the number and shape of the preserved stones in Bohaiornis may be most consistent with a raptorial ecology previously unknown for Enantiornithes and considered rare for Avialae.
On the horizon of Protopteryx and the early vertebrate fossil assemblages of the Jehol Biota
Protopteryx, a monotypic fossil bird discovered from the Sichakou basin in Fengning, Hebei, is the most primitive enantiornithine currently known. The bird-bearing strata do not contain the index
Comparison and Evaluation of the Effectiveness of Two Approaches of Diffusible Iodine-Based Contrast-Enhanced Computed Tomography (diceCT) for Avian Cephalic Material.
TLDR
A clear positive relationship between glycogen concentration and grayscale values measured within muscle, epithelia, nervous tissues, and glands is found and the use of ethanol for tissue fixation and following I2 E staining outperforms I2 KI-formaldehyde by providing higher efficiency for acquiring greater contrast both between different soft tissues and between mineralized and nonmineralized tissues.
Fossil evidence of the avian vocal organ from the Mesozoic
TLDR
The first remains, to the authors' knowledge, of a fossil syrinx from the Mesozoic Era are described, preserved in three dimensions in a specimen from the Late Cretaceous of Antarctica and show the fossilization potential of the avian vocal organ and beg the question why these remains have not been found in other dinosaurs.
Identity and novelty in the avian syrinx
TLDR
The syrinx falls into an unusual category of novel structures: those having significant functional overlap with the structures they replace, and may more commonly involve structural changes that contribute to or modify an existing function rather than those that enable new functions.
Insight into the growth pattern and bone fusion of basal birds from an Early Cretaceous enantiornithine bird
Significance We report an Early Cretaceous bird from 120 My ago that has a completely fused carpometacarpus and pelvis, pushing back the date for these avian traits by over 40 My. We suggest that
Functional morphology of the Alligator mississippiensis larynx with implications for vocal production
TLDR
Morphology and laryngeal biomechanics are used to model the boundaries of the alligator's available acoustic space, providing a systematic description of the possible acoustic space that could be available to an alligator larynx.
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