Dasornis abdoun, Bourdon & Amaghzaz & Bouya, 2010

Bourdon, Estelle, Amaghzaz, Mbarek & Bouya, Baâdi, 2010, Pseudotoothed Birds (Aves, Odontopterygiformes) from the Early Tertiary of Morocco, American Museum Novitates 2010 (3704), pp. 1-72 : 49

Dasornis abdoun , sp. nov., Bourdon

ETYMOLOGY: Refers to the phosphate basin where the holotype was found.

HOLOTYPE: OCP.DEK/GE 1033, incomplete right humerus.

TYPE LOCALITY: Ouled Abdoun Basin, Sidi Daoui (southeast of TS area, 32°50′87 N and 06°38′48 W: see Gheerbrant et al., 2003) .

TYPE HORIZON: Intercalary beds II/I (level 13), basal Ypresian, Lower Eocene (see Gheerbrant et al., 2003).

REFERRED MATERIAL: OCP.DEK/GE 1016, distal part of leπ carpometacarpus; OCP.DEK/ GE 1021, distal part of leπ carpometacarpus; OCP.DEK/GE 1022, incomplete distal end and fragment of shaπ of right ulna; OCP.DEK/GE 1030, distal part of leπ radius; OCP.DEK/GE 1031, proximal part of leπ humerus; OCP.DEK/GE 1096, fragment of shaπ of right femur; OCP. DEK/GE 1151, fragment of shaπ of right tibiotarsus close to proximal end; OCP.DEK/GE 1158, distal part of leπ carpometacarpus; OCP.DEK/GE 1191, fragment of shaπ of right tibiotarsus; MHNL 20-149225, distal end of leπ humerus.

LOCALITIES: Ouled Abdoun Basin, Sidi Daoui (Krupp, RP13 and TS areas).

HORIZONS: Intercalary beds II/I, basal Ypresian, Lower Eocene.

DIAGNOSIS: Gannet-sized odontopterygiform with a wingspan of 1.5–1.7 m that differs from D. emuinus and D. toliapica in the following features: much smaller size; humerus, distal almond-shaped foramen pneumaticum absent; intumescentia humeri displaced proximally and more developed; ulna, papillae remigales caudales smooth and narrow; radius, convexity cranial to sulcus tendinosus more prominent with a more strongly curved edge; carpometacarpus, os metacarpale majus caudocranially flattened.

MEASUREMENTS: See table 2 .