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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| O'Mahony, E. | 1944 | Macroplea appendiculata Panzer (Coleoptera: Chrysomelidae) in Ireland | Journal | Ent. Monthly Mag. | Details... |
| O'Mahony, E. | 1948 | Anommatus 12-striatus Mull. (Coleoptera: Colydiidae) and Adalia bipunctata (Coleoptera: Coccinellidae) in Co. Dublin | Journal | Ent. Monthly Mag. | Details... |
| O'Mahony, E. | 1949 | Lyctus brunneus Steph. (Coleoptera: Lyctidae) and Heterobostrichus aequalis Waterh. (Coleoptera: Bostrichidae) in Ireland | Journal | Ent. Monthly Mag. | Details... |
| O'Riain, S., Ryan, M.F. & McNaeidhe, F. | 1977 | Carabid beetles and the biological control of the cabbage root fly | Book | | Details... |
| Oliver, G.A. & Healy, B. | 1998 | Records of aquatic fauna from coastal lagoons in Ireland | Journal | Bull. Ir. biogeog. Soc. | Details... |
| Orr, H.L. | 1899 | The dispersal of Mollusca etc. | Journal | Ir. Nat. | Details... |
| Owen, J. | 1997 | Heterocerus fenestratus (Thunberg) (Coleoptera), new to Ireland | Journal | Ir. Nat. J. | Details... |
| Owen, J.A. | 1994 | Badister anomalous Perris, Carpelimus impressus (Lacordaire) and Stenus kiesenwetter Rosenhauer Coleoptera new to Ireland | Journal | Ir. Nat. J. | Details... |
| Owen, J.A. | 1995 | A note on Otiorhynchus uncinatus Germar. (Coleoptera) in Co. Tipperary | Journal | Ir. Nat. J. | Details... |
| Owen, J.A. | 1995 | Three species of Coleoptera new to Ireland | Journal | Coleopterist | Details... |
| Owen, J.A. | 1997 | Beetles (Coleoptera) recorded from various Irish sites in 1993, 1994 and 1996 | Journal | Bull. Ir. biogeog. Soc. | Details... |
| Owen, J.A. | 2001 | Bledius femorlais (Gyllenhal) (Coleoptera) new to Ireland | Journal | Ir. Nat. J. | Details... |
| Owen, J.A. & Owen, D.D. | 1993 | Beetles collected from various Irish sites | Unpublished | | Details... |
| Patterson, R. | 1885 | A list of Coleoptera collected mainly by the late Robert Patterson, Esq., F.R.S. in the year 1829. (ed. S.A. Stewart) | Appendix | Proc. Belf. Nat. Fld. Club | Details... |
| Patterson, W.H. & Donnan, W.D. | 1892 | Coleoptera of the Holywood District | Journal | Ir. Nat. | Details... |
| Peacock, E.R | 1993 | Adults and larvae of Hide, Larder and Carpet Beetles and their Relatives (Coleoptera: Dermestidae) and of Derodontid Beetles (Coleoptera: Derodontidae) | Book | | Details... |
| Pearce, E.J. | 1937 | Notes on, and additional records for, some Irish Haliplidae (aquatic Coleoptera), with special reference to Lough Derg | Journal | Ir. Nat. J. | Details... |
| Pearce, E.J. | 1957 | Coleoptera: Pselaphidae | Book | | Details... |
| Phillips, J.C.L. | 1991 | Excursion: Rea's Wood, Antrim | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Phillips, K.C.J. | 1923 | The larva of a hydrophilid beetle, Megasternum boletophagum | Journal | Ir. Nat. | Details... |
753 references found.