Canadian Journal of Arthropod Identification

Orthoptera of Alaska: A photographic key, new records, and synonymy of Melanoplus gordonae

CJAI 44 -- April 23, 2021

Adam Haberski1*, Derek A. Woller2, and Derek S. Sikes1

1University of Alaska Museum, 1962 Yukon Dr., University of Alaska Fairbanks, Fairbanks, Alaska, 99775, United States

2USDA APHIS PPQ S&T Phoenix Lab Rangeland Grasshopper and Mormon Cricket Management Team, 3645 East Wier Ave., Phoenix, Arizona, 85040, United States

* Corresponding author:

| Abstract | Introduction | Checklist | Materials & Methods | Taxonomy | DNA Barcoding | Species Key | Acknowledgments | References | PDF | Cite |


Currently, 18 species of Orthoptera are known from Alaska, representing the families Acrididae, Tetrigidae, and Rhaphidophoridae. There is considerable overlap in fauna between Alaska and the adjacent provinces of British Columbia (BC) and the Yukon Territory. Thirteen of the species known from Alaska also occur in both BC and the Yukon, two others are shared with just BC, two with just the Yukon, and one species is known only from Alaska and the Palearctic. We here present a photographic dichotomous key to adults of all 18 species, as well as updated distribution maps and a review of the available DNA barcode data. Stethophyma grossum (Linnaeus, 1758) is added as a new state and continent record based on a combination of molecular and morphological evidence. Stethophyma lineatum (Scudder, 1862) is subsequently removed from the Alaskan fauna. Melanoplus gordonae Vickery, 1969, previously believed to be an Alaskan endemic, is synonymized under Melanoplus borealis (Fieber, 1853). DNA barcoding results suggest that there may be undocumented diversity within Alaskan Pseudochorthippus curtipennis and Tetrix subulata (Linnaeus, 1758).


Orthoptera of Alaska

Arphia conspersa Scudder (photo by Brian Lotze)