Pogonognathellus flavescens (Tullberg, 1871)
P. flavescens was first recorded by Crafford in 1984 (Gabriel 1999). This introduced species is the largest of all the springtail species on Marion Island, where its distribution is restricted to P. cookii tussocks at only two coastal sites (Trypot Beach and Kildalkey, Treasure & Chown 2013). P. flavescens is easily recognized by its size and very long antennae, and is the largest species of Collembola on the island.
Gabriel AGA, Chown SL, Barendse J, Marshall DJ, Mercer RD, Pugh PJA, Smith VR (2001) Biological invasions on Southern Ocean islands: the Collembola of Marion Island as a test of generalities. Ecography 24: 421–430. doi:10.1111/j.1600–0587.2001.tb00477.x.