Overview of micro-inclusions from the Sainte-Baume amber grains. A: tuft of actinomycetes developing centripetally at the periphery of the grain; B: verticillate structure of suspected actinomycetes with a stellate appearance developed centripetally at the periphery of the grain; C: isolated clusters of thin actinomycete filaments; D: filaments with a spiral appearance which mimics the aerial hyphae of Streptomyces; E: undetermined micro-inclusion showing a foliaceous structure developed centripetally at the periphery of the grain (black arrow); F: detail of peripheral opaque sleeve showing the entanglement between the filaments of Leptotrichites resinatus (black arrow) and the networks of Streptomyces-type filaments (white arrow); G: view of a grain with thick peripheral centripete sleeve formed by various micro-inclusions; H: detail of the dense filamentous network assigned to different types of micro-inclusions such as filaments of Leptotrichites resinatus.