2026-10-12T11:21:43Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34034556 2026-09-30T17:26:06Z category_16 category_24 category_272 category_39 category_734 portal_5 item_type_1 month_year_09_2026

<p>Segmented paranasal sinuses of <i>Falcarius utahensis</i> (NCSM 39000).</p> William J. Freimuth (22495838) Joshua R. Lively (9409306) Lindsay E. Zanno (11506677) Physiology Evolutionary Biology Environmental Sciences not elsewhere classified Ecology Biological Sciences not elsewhere classified suarez site bonebed shared maxillary proportions labially convex morphology div >< p phylogenetic analyses recover monodominant therizinosaurian bonebed isolated maxilla recovered geminiraptor suarezarum </ falcarius utahensis </ falcarius suarezarum </ early therizinosaurian crania geminiraptor </ phylogenetic datasets beipiaosaurus </ geminiraptor .</ early therizinosaurians usa ). understanding evolutionary sister taxon restricts definitive reidentify “< recorded member possible lacrimal poor understanding original description novel combination north america mosaic evolution morphometric analyses minute denticles like troodontidae key taxon holotype maxilla geologically oldest g ., fragmentary braincase fourth therizinosaurian earliest cretaceous cranial bones converged upon coelurosaurian maxillae carnivorous diet biogeographic patterns basal swelling <p>Maxilla in lateral (A–C; inset box in (B) corresponds to (C)), dorsal (D), ventral (E), rostral (F, G) and medial view (H, I). (F) and (H) include translucent bone, (G) and (I) display sinuses without bone. Scale bars are 1 cm (B, D–I are to scale).</p> 2026-09-30T17:25:52Z Image Figure 10.1371/journal.pone.0356471.g010 https://figshare.com/articles/figure/_p_Segmented_paranasal_sinuses_of_i_Falcarius_utahensis_i_NCSM_39000_p_/34034556 CC BY 4.0