Complex sentence: Undescribed fossils are also known from the Paleocene of Utah and possibly the Early Eocene of Mongolia (Kurochkin "et al", 2002), and the coracoid still assigned to "Headonornis" (Dyke, 2001) may also belong into this genus.
Split into simpler sentences: Undescribed fossils are also known from the Paleocene of Utah and possibly the Early Eocene of Mongolia Kurochkin "et al" (2002). The coracoid still assigned to "Headonornis" Dyke (2001) may also belong into this genus.