Miomancalla howardi sp. n.

Mio to reflect Miocene occurrences of known species within the taxon, and mancalla to reflect the sister group relationship with Mancalla Lucas, 1901.

Miomancalla is differentiated from Mancalla by the following humeral characteristics: capital groove wider (137:0); supracoracoidial crest (sensu Fürbringer 1888; see Baumel and Witmer 1993: 98) proximally broader (113:1); ventral margin of the ventral tubercle broader and deeply grooved rather than narrow and ventrally expanded (134:1); distal margin of the primary pneumotricipital fossa concave rather than convex (126:2).

Based upon phylogenetic results (see below) and apomorphies shared with Miomancalla howardi (see diagnosis above), Praemancalla wetmorei Howard 1966is referred to Miomancalla, and becomes Miomancalla wetmorei (Howard 1966). See Appendix 1 for additional details of the taxonomic revision.