New and important pennaraptoran specimens continue to be discovered on a regular basis.
Yet, with these discoveries the number of viable phylogenetic hypotheses has increased�…

Introduction/Michael Pittman and Xing Xu--Section 1. Systematics, fossil record, and
biogeography--Chapter 1. Pennaraptoran systematics/Michael Pittman, Jingmai O'Connor�…

This chapter will cover clade definitions, the relationships within clades as well as the
occasional controversial relationships between different clades. Phylogenies arising from a�…

The phylogenetic relationships of the species commonly referred to as 'hypsilophodontids'
remain one of the key questions in ornithischian dinosaur research, having profound�…

Ankylosauria is a diverse clade of quadrupedal ornithischian dinosaurs whose remains are
known from Middle Jurassic to latest Cretaceous sediments worldwide. Despite a long�…

The anurognathids are an enigmatic and distinctive clade of small, non‐pterodactyloid
pterosaurs with an unusual combination of anatomical traits in the head, neck, wings and�…

The recently described maniraptoran theropod Zhongornis haoae, known from a single
juvenile specimen, was originally identified as a bird. However, morphological re-evaluation�…

Ornithischians form a large clade of globally distributed Mesozoic dinosaurs, and represent
one of their three major radiations. Throughout their evolutionary history, exceeding 134�…

An unabated surge of new and important discoveries continues to transform knowledge of
pennaraptoran biology and evolution amassed over the last 150+ years.! is chapter�…

Coelurosauria is the most diverse clade of theropod dinosaurs. Much of this diversity is
present in Paraves—the clade of dinosaurs containing dromaeosaurids, troodontids, and�…