Dysporus cyanops Sundevall, Physiograf. Sällsk. Tidskrift, Lund, vol. I, No. 3, p. 218, footnote, 1838.= Sula dactylatra dactylatra Lesson, 1831
Holotype ? : Semiadult, Atlantic Ocean near the Equator. 6. IX. 1827. C. Sundevall leg. (Ex. Mus. Gyllenkrook). No. 4455. - Measurements of type : wing : 422 mm.; tail : 174 mm.; culmen : 102 mm.; tarsus : 53 mm.Click on the picture for enlargement.