|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Reptilia - Avetheropoda - Plotopteridae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|G. J. Dyke et al. 2011||The characters listed here differentiate Tonsala buchanani from its counterpart, T. hildegardae Olson, 1980. Humerus: Shallow fossa m. brachialis in caudal view (cf. USNM 256518, where this fossa is deeper and more rounded); margin between crista brachialis and humeral shaft almost 90 degrees (this angle is markedly greater than 90 degrees in USNM 256518; Olson, 1980: fig. 2); sulcus ligamentous transversus extends all the way across the cranial surface of the proximal humerus (this sulcus does not reach the impressio coracobrachialis in USNM 256518). Coracoids much larger in size (Table 1). Carpometacarpus: processus extensorius rounded and blunt (not upturned as in T. hildegardae); os metacarpale alulare extends distally down the length of the element as a flat shelf; fossa infratrochlearis of carpometacarpus deep above processus pisiformis (this region not as excavated in T. hildegardae); cranial margin between trochlea carpalis and processus pisiformis narrow (wider in T. hildegardae).|