Bohaiornis guoi

Overview

Bohaiornis guoi is an Early Cretaceous bird with a conspicuously short, robust snout. Connections among the head, wings, and hind limbs were studied in an adult specimen. Comparing it with ancient birds with long, slender snouts reveals a different face.^[1]

Key facts

The adult V17963 used in the study and the type specimen B00167 are different individuals. The type specimen was interpreted as a subadult. Separating fossils at different growth stages makes clearer which material informs our understanding of a species’ body.^[1][2]

Time and place

Adult V17963 is material from the Jiufotang Formation at Lamadong, Jianchang, in present-day Liaoning Province, China. The Early Cretaceous was roughly 140–100 million years ago. Body diversity can be explored by comparison with other birds from the same broad time and region.^[1][3]

The time range describes source context, not the complete duration of this species.

Size, form and skeleton

A short, robust snout and an articulated skeleton of the wings and hind limbs are described. The 47.1mm figure in the literature is this adult’s skull length. Distinguishing head measurements from total body length makes clear which region’s size is being discussed.^[1]

Habitat and reproduction

The wings connected at the shoulder and the hind limbs connected at the pelvis can be examined together. Several regions of the adult specimen provide evidence for comparing Cretaceous bird bodies. Look beyond the impression of the snout to the connections running from head to legs.^[1]

Fossil discovery

After the 2011 description, a separate adult specimen was studied in 2014. The additional individual allowed fresh comparisons of the head, wings, and hind limbs. The first fossil used to name the species and later material opened different research opportunities.^[1][2]

References

1. A new specimen of large-bodied basal Enantiornithine Bohaiornis from the Early Cretaceous of China and the inference of feeding ecology in Mesozoic birds
2. 2011 study — The description of Bohaiornis
3. International Commission on Stratigraphy (2024) — Geological time chart
4. Zhou·Zhang (2001) — Yanornis from Liaoning
5. 2014 study — An adult skeleton of Bohaiornis
6. 2011 study — The description of Bohaiornis

Research questions

What differences might a small individual and an adult show? Bohaiornis research distinguishes the growth stage of the type specimen from the separate adult. This material encourages consideration of individual growth when examining a species’ features.^[1][2]

Observation

Move your gaze from the short, robust snout to the trunk, wings, and hind limbs. Comparing head outlines with those of other Cretaceous birds from Liaoning conveys the varied forms of ancient birds.^[1]