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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| O'Meara, E. | 1875 | Report on the Irish Diatomacea | Journal | Proc. Roy. Ir. Acad. | Details... |
| O'Meara, E. | 1878 | List of Diatomaceae found in the counties of Dublin and Wicklow | Journal | Sci. Proc. R. D. S. | Details... |
| O'Riordan, C.E. | 1964 | Notes on rare Irish fishes in the National Museum of Ireland | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1966 | Parasitic copepods in the collections of the National Museum of Ireland | Journal | Proc. Roy. Ir. Acad. | Details... |
| O'Riordan, C.E. | 1966 | The copepod fauna of the inshore plankton of Dalkey, Co. Dublin | Journal | Proc. Roy. Ir. Acad. | Details... |
| O'Riordan, C.E. | 1967 | Cirripedes in Ireland (Irish cirripedes in the collections of the National Museum of Ireland and in the literature) | Journal | Proc. Roy. Ir. Acad. | Details... |
| O'Riordan, C.E. | 1968 | Some interesting fauna from the Dingle area | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1969 | A catalogue of the collection of Irish marine Crustacea in the National Museum of Ireland | Published | | Details... |
| O'Riordan, C.E. | 1971 | Further interesting fauna from the Dingle area | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1972 | Some noteworthy Crustacea and Mollusca from the Dingle Bay area | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1977 | Review: 'List of Irish fishes' by A.E.J. Went & M. Kennedy | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1981 | A review of the provisional list of Cetacea stranded or captured on the Irish coast | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1984 | Some interesting fishes and other marine fauna from the Porcupine Bank | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1986 | Marine fauna notes from the National Museum of Ireland - 10. | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. & O'Connor, J.P. | 1985 | Notes on the collection of Porifera housed in the National Museum of Ireland, with provisional lists of contained putative types | Journal | Ir. Nat. J. | Details... |
| O'Sullivan, G. | 1983 | The intertidal fauna of Aughinish Island, Shannon, Co. Limerick | Journal | Ir. Nat. J. | Details... |
| O'Sullivan, G. | 1984 | Seasonal changes in the intertidal fish and crustacean populations of Aughinish Island in the Shannon Estuary | Journal | Ir. Fish. Invest. | Details... |
| Ogilby, J.D. | 1885 | Notes on some Irish fishes | Journal | Sci. Proc. R. D. S. | Details... |
| Ossiannilsson, F. | 1983 | Auchenorhyncha (Homoptera) of Fennoscandia and Denmark. Part 3: the family Cicadellidae: Deltocephalinae, catalogue, literature and index | Journal | Fauna Entomol. Scand. | Details... |
| Pack-Beresford, D.R. | 1909 | A supplementary list of the spiders of Ireland | Journal | Proc. Roy. Ir. Acad. | Details... |
747 references found.