Scansoriopteryx heilmanni (Czerkas and Yuan 2002, CAGS02-IG-gausa-1/DM 607) is a small basal bird (as recovered by the large reptile tree). It has a bird-like pelvis, but this has not been recognized by other paleontologists who identified the displaced ischium as the pubis and the pubis as the ischium. That made it appear that the pubis did not point posteriorly, as it does in all birds and related taxa.

Yi qi (Xu et al. 2015) the authors noted a new long bony element in the fore limb of Yi qi never before seen on any bird, dinosaur, or archosaur. They labeled the new bone a ‘styliform element’ in accord with similar elements in flying squirrels. That long bone on one side is displaced radius. On the other side a displaced ulna.

Epidexipteryx hui (Zhang et al. 2008, IVPP V 15471) another scansoriopterygid also has a mistakenly identified pubis and ischium. This anurognathid-like basal bird has the largest teeth relative to its skull of any bird. Zhang et al. thought Epidexipteryx was a bizarre maniraptoran nesting just basal to birds

Omnivoropteryx sinousaorum (Czeraks and Ji 2002) nests with Epidexipteryx (above).

Czerkas SA and Yuan C 2002. An arboreal maniraptoran from northeast China. Pp. 63-95 in Czerkas, S.J. (Ed.), Feathered Dinosaurs and the Origin of Flight. The Dinosaur Museum Journal 1. The Dinosaur Museum, Blanding, U.S.A.

Czerkas SA and Ji Q 2002. A preliminary report on an omnivorous volant bird from northeast China.” In: Czerkas, SJ (editor): Feathered Dinosaurs and the origin of flight. The Dinosaur Museum Journal 1:127-135.

Xu X, Zheng X-T, Sullivan C, Wang X-L, Xing l, Wang Y, Zhang X-M, O’Connor JK, Zhang F-C and Pan Y-H 2015. A bizarre Jurassic maniraptoran theropod with preserved evidence of membranous wings. Nature (advance online publication)
doi:10.1038/nature14423

Zhang F, Zhou Z-H, Xu X, Wang X and Sullivan C 2008. A bizarre Jurassic maniraptoran from China with elongate ribbon-like feathers. Nature 455 doi:10.1038:1105-1108.

Xu X and Norell MA 2004. A new troodontid dinosaur from China with avian-like sleeping posture. Nature 431:838-841.

Gao C, Morschhauser EM, Varricchio DJ, Liu J, Zhao B 2012. Farke AA ed. "A Second Soundly Sleeping Dragon: New Anatomical Details of the Chinese Troodontid Mei long with Implications for Phylogeny and Taphonomy". PLoS ONE 7 (9): e45203. doi:10.1371/journal.pone.0045203. PMC 3459897. PMID 23028847.

wiki/Scansoriopteryx
wiki/Yi_(dinosaur)
wiki/Epidexipteryx
wiki/Omnivoropteryx