Fig. 2From: Armored catfish (Siluriformes: Loricariidae) from the Miocene of southern Pampas and its palaeobiogeographical implicationsIndeterminate Loricariidae (MMH-CH-85-4-140), left pectoral spine in: a anterior; and b posterior views. aap anterior articular process, br basal recess, dap dorsal articular process, ls longitudinal sulcus, vap ventral articular process. Scale bar equals 10 mmBack to article page