New species in old mountains: integrative taxonomy reveals ten new species and extensive short-range endemism in Nesticus spiders (Araneae, Nesticidae) from the southern Appalachian Mountains

southwestern Nesticus reclusus epigynal variation. North Carolina, Graham Co., Appalachian Trail, S of Stecoah Gap, MCH 02_165, ventral (A), dorsal (B). North Carolina, Graham Co., ENE of Fontana Village, MCH 07_120, ventral (C), dorsal (D). North Carolina, Cherokee Co., Beaver Creek Road, MCH 04_057, ventral (E), dorsal (F). Georgia, Gilmer Co., Rock Creek Road, N of Rich Mountain Wilderness, MCH 07_102, MCH specimen #N1160, ventral (G), dorsal (H). North Carolina, Clay Co., Tusquitee Mountains, Long Branch of Fires Creek, MCH 02_144, ventral (I), dorsal (J). North Carolina, Macon Co., Ball Road, SE of Beechertown, MCH 04_072, ventral (K). Scale bar: 0.5 mm.