The hills near Missoula, Montana, are changing, native grasses and other plants increasingly squeezed out by nonnative plants. Knapweed, cinquefoil, and other weeds aren’t only changing the look of this ecosystem but its very structure. As ecologist Dean Pearson’s research has shown, however, some species are benefitting from the changed habitat in unexpected ways. You just have to look closely to see them. Photo Credit: Dean Pearson read moreDuration: 5:02Published: Wed, 10 Aug 2011 16:30:48 +0000
Figures 1–5. Habitus of Dictyna palmgreni sp. n. 1–2 from Pallastunturi, Dictyna schmidti 3 from Yakutia and Dictyna major 4–5 from Pyhtaa. 1, 3–4 male; 2, 5 female.
Figures 6–11.Prosoma and abdomen of Dictyna palmgreni sp. n. 6–9 and Dictyna schmidti 10–11. 6, 10 – male carapace, lateral 7 male abdomen, dorsal 8–9 female abdomen, dorsal 11 prosoma, frontal 6 10–11 from the Upper Kolyma 7 from Krasnoyarsk Province 8–9 from Basegi (Ural).
Figures 12–17. Male prosoma of Dictyna palmgreni sp. n. 12–13 from Pallastunturi, Dictyna schmidti 14–15 from Yakutia and Dictyna major 16–17 from Pyhtaa 12, 14, 16 lateral 13, 15, 17 frontal.
Figures 22–27. Male palp of Dictyna palmgreni sp. n. 22–23 from Pallastunturi, Dictyna schmidti 24–25 from Yakutia and Dictyna major 26–27 from Pyhtaa 22, 24, 26 ventral 23, 25, 27 retrolateral.
Figures 28–31. Epigyne of Dictyna palmgreni sp. n. 28–30 from Basegi (Ural) and Dictyna schmidti 31. 28, 31a epigyne, ventral 29, 31b sclerotised part of receptacula 30a,b left receptaculum, different aspects. 31 after Danilov (2000), sub. Dictyna shilenkovi.
Figures 32–39. Epigyne of Dictyna palmgreni sp. n. 32–33 from Pallastunturi and Dictyna major 34–39 from Pyhtaa 32, 34, 36, 38 macerated epigyne, ventral 33, 35, 39 macerated epigyne, dorsal 37 macerated epigyne showing sac-like structure, frontal. Sac-like structure on Fig. 39 collapsed and sclerotised parts of epigyne became closer.