Prosobonia, BONAPARTE, 1850

De Pietri, Vanesa L., Worthy, Trevor H., Scofield, R. Paul, Cole, Theresa L., Wood, Jamie R., Mitchell, Kieren J., Cibois, Alice, Jansen, Justin J. F. J., Cooper, Alan J., Feng, Shaohong, Chen, Wanjun, Tennyson, Alan J. D. & Wragg, Graham M., 2021, A new extinct species of Polynesian sandpiper (Charadriiformes: Scolopacidae: Prosobonia) from Henderson Island, Pitcairn Group, and the phylogenetic relationships of Prosobonia, Zoological Journal of the Linnean Society 192, pp. 1045-1070 : 1053

PROSOBONIA BONAPARTE, 1850

The Henderson bones ( Fig. 5) can be attributed to Prosobonia and no other genus within Scolopacidae based on the following combination of features: humerus with fossa pneumotricipitalis dorsalis dorsoventrally wide (wider than ventral fossa), crista deltopectoralis only just surpassing distally crista bicipitalis, crista bicipitalis straight, tip of processus supracondylaris dorsalis with distinct proximal orientation; ulna with tubercle proximal of incisura tendinosa prominent dorsally; carpometacarpus with wide spatium intermetacarpale; femur with prominent tuberculum musculi gastrocnemialis lateralis, wellmarked impressiones ansae musculi iliofibularis and cranially salient medial crest of sulcus patellaris; tarsometatarsus with trochlea metatarsi II flaring medially, noticeable widening of shaft distally; sternum with spina externa rostrally extended, bifurcated tip that projects dorsally, pars cardiaca shallow, incisurae laterales reduced (not preserved in Henderson specimens).