Folding-door spider

Description:

Black spider a little more than an inch long (see fir needles in the picture for comparison). The end of the abdomen had two "spikes". Large palps indicate it was a male. Shiny black legs with prominent long hairs, shiny black main segment, fuzzy abdomen. Running along the ground fairly quickly until it felt threatened when I was taking its picture and it drew its legs inward.

Habitat:

Old mixed forest 3 miles inland from the Pacific coast, about 500' elevation.

Notes:

I've entertained thoughts that this is a trapdoor spider (it looks like the pictures) but have not heard of such a creature in our woods. We have black ground spiders that move quickly, but they stay in the grass and are quite a bit smaller. LATER: Apparently they're here but stay hidden. These spiders are similar to tarantulas in that their fangs slice down rather than pinching.