Although in most arachnids these particles resemble those of
insect HDLs called “lipophorins”, in two arachnid species they differ from lipophorins in their apoproteins, total mass and lipid composition. The
hemolymph of P. pythagoricus and L. mirabilis contains another HDL of higher density, while P. pythagoricus and E. californicum hemolymph contain a
third lipoprotein of very high density (VHDL).