Umm, we need to talk as I would love to have a culture of the duellica.Ditto what Davisfarm and Jsloan said. I've got myself a clan of these T.gigantea (er, duellica? What name did we settle for? :?) captive and I think they are pretty distinctive as adults, compared to other Tegenaria spiders. But it's probably because I have three species in my yard and see them often, so maybe I just have an eye for the differences now.