A new genus of Isotomidae, Bellisotoma gen. n., is described. The new genus is a member of the Proisotoma genus complex and is characterized by a combination of having a bidentate mucro with wide dorsal lamellae that join clearly before the end of mucronal axis without forming a tooth and one strong ventral rib with basal notch that articulates with dens; having abundant chaetotaxy on both faces of dens; and abundant tergal sensilla. Bellisotoma gen. n. shows a furcula adapted to a neustonic mode of life, and may be a Isotopenola-like derivative adapted to neustonic habitats. Subisotoma joycei Soto-Adames & Giordano, 2011 and Ballistura ewingi James, 1933 are transferred to the new genus. (c) Felipe N. Soto-Adames et al.
Soto-Adames, F. N., Giordano, R., & Christiansen, K. (2013). Bellisotoma, a new genus of Isotomidae from North America (Hexapoda, Collembola). ZooKeys, 283, 7--13. https://doi.org/10.3897/zookeys.283.3277