original description
Müller, G. W. (1906). Ostracoda. <em>Wissenschaftliche Ergebnisse der deutsche Tiefsee-Expedition auf dem Dampfer "Valdivia".</em> 8: 27-154. [details]
From editor or global species database
Taxonomy The two forms of P. oblonga are determined by the positions of the right Symmetrical Gland. The CO1 gene sequences imply the two forms are separate species although they do co-occur [details]