original description
(of Eustrongylosoma orthogona Silvestri, 1898) Silvestri, F. (1898). Alcuni nuovi Diplopodi della N. Guinea. Annali del Museo civico di storia naturale di Genova, serie 2, 19: 441-450. Genova, available online at http://biodiversitylibrary.org/page/7932847
page(s): 442, figs 1-2 [details]
additional source
Attems, C. M. T. Graf von (1915). Myriopoden von Neu-Guinea II. Gesammelt während der Expeditionen 1904-1909. Nova Guinea, 13: 1-38. Leiden, available online at https://www.biodiversitylibrary.org/page/40339145
page(s): 21; note: Orthomorpha (Helicorthomorpha) orthogona [details]
new combination reference
Attems, C. M. T. Graf von. (1914). Die indo-australischen Myriopoden. <em>Archiv für Naturgeschichte.</em> 80A(4): 1-398. Berlin., available online at https://www.biodiversitylibrary.org/page/13260451
page(s): 198; note: Orthomorpha (Helicorthomorpha) orthogona [details]
From editor or global species database