Variable in italic for plot title

Here is an example how to plot a title in italic using a variable.

layout(1)
i <- "Caretta caretta"
plot(1, main=substitute(expr = paste("Species name: ", italic(i)), 
                        env = list(i=i)))

Or simpler:

i <- "Caretta caretta"
plot(1, main=bquote("Species name: "*italic(.(i))))

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