Nature School Game Contact Blog Project Noah Facebook Project Noah Twitter

A global citizen science platform
to discover, share and identify wildlife

Join Project Noah!
nature school apple icon

Nature School For Teachers - Fall 2020 Launch! visit nature school

Folding-door spider

Antrodiaetus pacificus

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.

Species ID Suggestions



Sign in to suggest organism ID

5 Comments

shebebusynow
shebebusynow 3 years ago

I'm currently thinking this is a Ummidia sp.

shebebusynow
shebebusynow 3 years ago

Thanks, Daniele! Hope to upload lots more pics this winter; been busy taking them & trying to I.D. Felix, I agree it looks like a trapdoor spider. Hadn't seen one around here before, but it sure matches the descriptions. It hunkered down when threatened so I'm sure it isn't a funnel-web (if we even have them here, which I don't think we do). I'm thinking it's shiny cephalothorax might mean it's not a mouse spider.

DanielePralong
DanielePralong 3 years ago

Nice to see you around Project Noah again shebebusynow!

Felix Fleck
Felix Fleck 3 years ago
Felix Fleck
Felix Fleck 3 years ago

It looks like some kind of Trapdoor Spider.

shebebusynow
Spotted by
shebebusynow

Oregon, USA

Spotted on Sep 25, 2017
Submitted on Oct 5, 2017

Related Spottings

Trap door spider (male) Folding-door Spider Trapdoor Spider Unknown Spider

Nearby Spottings

Brush rabbit Spotting Spotting Pileated woodpecker
Noah Guardians
Noah Sponsors