Phrynotettix robustus, known generally as the robust toad lubber or robust toad hopper, is a species of lubber grasshopper in the family Romaleidae.[1][2][3][4] It is found in North America.[2][5]
Subspecies
These three subspecies belong to the species Phrynotettix robustus:[2][3][4]
Phrynotettix robustus manicola Rehn and Grant, 1959
Phrynotettix robustus occultus Rehn and Grant, 1959
Arnett, Ross H. Jr. (2000). American Insects: A Handbook of the Insects of America North of Mexico. Vol. 2nd Edition. CRC Press. ISBN0-8493-0212-9.
Bland, Roger (2003). The Orthoptera of Michigan: Biology, Keys, and Descriptions of Grasshoppers, Katydids, and Crickets. Michigan State University Extension. ISBN978-1565250178.
Otte, Daniel (1997). "Orthoptera". In Poole, Robert W.; Gentili, Patricia (eds.). Nomina Insecta Nearctica: A Check List of the Insects of North America: vol. 4: Non-Holometabolous Orders. Entomological Information Services. pp. 581–634. ISBN1-889002-04-6.