Figure 1 in The Late Cenozoic Passerine Avifauna from Rackham's Roost Site, Riversleigh, Australia

Figure 1. Distal left tibiotarsi of (A) fossil malurid gen. et sp. indet. QM F30361 and (B) Stipiturus malachurus AM O.68207 in cranial aspect. Some characteristic features of Maluridae shown: 1, sulcus extensorius very shallow and displaced laterally of the medio-lateral midpoint of the shaft; 2, tuberositas retinaculi extensori lateralis situated on proximo-lateral part of pons supratendineus; 3, condylus lateralis greater in width and in proximal extent than condylus medialis. Scale bar = 2 mm.