Figures 41-46 from: Soto-Adames F (2011) New species of springtails in the Proisotoma genus complex from Vermont and New York, USA with descriptive notes on Ballistura alpa Christiansen & Bellinger 1980 (Hexapoda, Collembola, Isotomidae). ZooKeys 147: 19-37. https://doi.org/10.3897/zookeys.147.2093

Figures 41-46 - Pachyotoma alpa (Christiansen & Bellinger) 41 dorsal chaetotaxy of Th. 2-Abd. 5, s= sensilla, ms= microsensilla 42 Ant. 4 subapical sense organ 43 Ant. 3 sense organ and associated sensilla, arrow points anteriorly 45 Mucro 46 Lateral anal valve 47 Chaetotaxy of anterolateral (al), anteromedial (am) and posterior (p) furcula subcoxae and their position relative to tenaculum (ten).