From Bar-On, Phillips, and Milo in PNAS, 2018. Immediate stats that come to mind which are maybe more applicable to astrobiology: how many calories (or molecules or glucose) produced per unit energy of sunlight, per unit mass of plants? How about per overall energy produced by the sun (decreased by distance from sun and cloud cover on Earth)? How about base pairs per unit mass of taxon? Viruses probably win that one handily. And finally - an animation over time, where we see the branches appear, mass extinctions, and finally at the end a blossoming of birds and mammals which is really just livestock (or DOES livestock actually out-mass the pre-Holocene wild mammal and bird mass?)
The only thing here that really surprises me is that molluscs are higher mass than I expected, and nematodes lower mass.
"...there is good and bad speculation, and this is not an unparalleled activity in science...Those scientists who have no taste for this sort of speculative enterprise will just have to stay in the trenches and do without it, while the rest of us risk embarrassing mistakes and have a lot of fun." - Dan Dennett