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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 650.940.800.575.912.250.401.906 Trifolium B01.650.940.800.575.912.250.401. ...
  2. New RefSeq annotations! - NCBI Insights 
    https://ncbiinsights.ncbi.nlm.nih.gov/.../02/17/refseq-annotations-4
    ... clarkii (red swamp crayfish) Salmo salar (Atlantic salmon) Trifolium pratense (eudicot) Ursus americanus (American black bear) See ...