The species name Coccinella sedecimmaculata may refer to:

• Coccinella sedecimmaculata Fabricius, 1787: 58 - junior synonym of Oenopia conglobata conglobata
• Coccinella sedecimmaculata Thunberg, 1787: 34 - junior synonym of Harmonia quadripunctata
• Coccinella sedecimmaculata Thunberg, 1795: 109 - another junior synonym of Oenopia conglobata conglobata
• Coccinella sedecimmaculata Fabricius, 1801 - junior synonym of Oenopia impustulata

References

• Fabricius, J.C. 1787. Mantissa insectorum, sistens eorum species nuper detectas adiectis characteribus genericis, differentiis specificis, emendationibus, observationibus. Vol. 1: 348 pp. Christ. Gottl. Proft, Hafniae. BHL Reference page. 
• Fabricius, J.C. 1801. Systema eleutheratorum secundum ordines, genera, species: adiectis synonimis, locis, observationibus, descriptionibus. Tomus I. Impensis bibliopoli academici novi, Kiliae, 506 pp. Online. Reference page. 
• Thunberg, C.P. 1787. Museum naturalium Academiae Upsaliensis III. Donation. Thunbergianae 1785 continuat. I. Upsala, 33–42pp. BHL Reference page. 
• Thunberg, C.P. 1795. Dissertatio Entomologica sistens Insecta Svecica, IX. Upsala. 105–113pp. Google books Reference page.