I see a few spiders, but nothing specifically based on a trapdoor spider. I was thinking two-stage evolution with the first stage based on
https://en.wikipedia.org/wiki/Sydney_brown_trapdoor_spider and the second on
https://en.wikipedia.org/wiki/Sydney_funnel-web_spiderAs far as types go, bug/ground into poison/ground maybe?
To represent the burrowing behaviour, I was thinking of was a Ground-type signature move that hides it underground; it remains underground until it uses a different move, at which point it unburrows.
Moveset-wise, Sticky Web is a must due to how the actual species sets up silk trip-lines; you can make a similar argument for Spikes, Toxic Spikes, and devious boulders. Poison Fang is also obvious, and basically everything gets Toxic. Venom Drench, Venoshock, and anything else exploiting Poisoned targets go with the general "highly venomous" theme too.
Pic related is not a funnel-web, just some type of trapdoor spider, but seems a nice illustration of the species' behaviour.
