Archosaurian Bipedalism as a Sensory Optimization: The Synsacrum and LSO as a Solid-State Kinetic Chain for Real-Time Seismic Integration and Substrate Analysis

Abstract Current paleontological models of bipedalism are physically untenable as they ignore the Neural Latency Paradox and the laws of acoustic impedance. This paper demonstrates that bipedalism in the Archosaurian lineage was a mandatory hardware upgrade for sensory survival and predatory stealth. By transitioning to a bipedal stance, dinosaurs achieved Cascading Structural Integration, coupling the substrate directly to the lumbosacral organ (LSO) via a solid-state bone matrix at a transmission speed of 3,000 meters per second. This configuration functions as an inverted bilateral "rabbit-ear" antenna array, providing the sub-millisecond data required for predator triangulation, passive ambush predation, and substrate analysis—capabilities that are physically impossible in "cold," high-latency quadrupedal systems.