(ofPseudopallene difficile Arango, 2009)Arango, C.P. (2009). New species and new records of sea spiders (Arthropoda: Pycnogonida) from deep waters in Western Australia. Zootaxa, 1977: 1–20.[details]
Bamber, R.N.; El Nagar, A.; Arango, C.P. (Eds) (2024). Pycnobase: World Pycnogonida Database. Pallenella difficile (Arango, 2009). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1509509 on 2024-05-02
original description(ofPseudopallene difficile Arango, 2009)Arango, C.P. (2009). New species and new records of sea spiders (Arthropoda: Pycnogonida) from deep waters in Western Australia. Zootaxa, 1977: 1–20.[details]