Holotype of Indonaiarectangularis (Tapparone-Canefri, 1889), comb. nov. [MSNG]. A, B Shell, lateral view: inner side of the left valve and outer side of the right valve (A); vice versa (B) C shell, dorsal view D original label [probably by C.M. Tapparone-Canefri] E, F secondary labels [probably by B. Prashad]. Scale bar: 5 mm. (Photos: Ilya V. Vikhrev).