There are approximately 4 species and subspecies in this genus: U. caudatus · U. dispar · U. gibbus · U. lepisma
There are approximately 12 species and subspecies in this genus: T. dybsoena · T. formosa · T. fragilis · T. patelliformis · T. punctata · T. sagittifera · T. salina · T. setifera · T. splendida · T. thomseni · T. triangulata · T. tripus
Accessed through GBIF Data Portal November 18, 2007:
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