Shirley, T. C.; Storch, V. (1999). Halicryptus higginsi n.sp. (Priapulida): A Giant New Species from Barrow, Alaska. <em>Invertebrate Biology.</em> 118(4): 404-413., available online athttps://doi.org/10.2307/3227009[details] Available for editors
Neuhaus, B. (2021). World List of Priapulida. Halicryptus higginsi Shirley & Storch, 1999. Accessed through: Marine Species Traits editorial board (2021) Marine Species Traits at: http://marinespecies.org/traits/aphia.php?p=taxdetails&id=265142 on 2025-06-02
Marine Species Traits editorial board (2025). Marine Species Traits. Halicryptus higginsi Shirley & Storch, 1999. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=265142 on 2025-06-02
original descriptionShirley, T. C.; Storch, V. (1999). Halicryptus higginsi n.sp. (Priapulida): A Giant New Species from Barrow, Alaska. <em>Invertebrate Biology.</em> 118(4): 404-413., available online athttps://doi.org/10.2307/3227009[details] Available for editors