Figure 42. Character 89 in Morphology-based phylogenetic analysis and classification of the family Rhinocryptidae (Aves: Passeriformes)

Figure 42. Character 89 and its postulated states. Musculus tracheolateralis, ventral surface, configuration: A, restricted to the lateral surfaces of the trachea – 89.0; B, both sides expand ventrally and meet along the ventral surface of the trachea – 89.1. Stippled areas are cartilaginous tissue, non-stippled areas are calcified structures. A1/B1 elements are indicated. Syringes/trachaea of (A) Teledromas fuscus (MCP 2396) and (B) Myornis senilis (QCAZ 3724) in ventral view. Scale bars = 2 mm.