Scattergram of Bishop Museum shell measurements comparing shell width (y-axis) by shell length (x-axis) of 48 P. langfordi from Aguigan and 47 P. lutaensis sp. nov. from Rota. The mean shell length and width plus standard deviation of each species are encircled. All shells were lipped indicating snails were mature and had reached terminal growth.

 
 
  Part of: Sischo DR, Hadfield MG (2021) The tree snail on Rota Island, Northern Mariana Islands, long identified as Partula gibba (Partulidae), is a different species. ZooKeys 1037: 105-118. https://doi.org/10.3897/zookeys.1037.56303