| Hämäläinen, M & Clayhills, T. (1972): An interesting colour form of Coccinella septempunctata L: (Col., Coccinellidae). Annales Entomologici Fennici 38 (3):158-159. |
| Clayhills, T & Markkula, M. (1974): The abundance of coccinellids on cultivated plants. Annales Entomologici Fennici 40 (2):49-55. |
| Clayhills, T. (1982): The distribution of Ipidia sexguttata sexguttata (Coleoptera, Nitidulidae). Notulae Entomologicae 62:145-146. |
| Clayhills, T & Rutanen, I. (1987): Hyperaspis inexpectata found in Finland (Coleoptera, Coccinellidae). Notulae Entomologicae 67:209. |
| Koponen, S & Clayhills, T. (1988): Notes on Corticaria dentiventris (Coleoptera, Latridiidae). Notulae Entomologicae 68:131-132. |
| Clayhills, T. (1991): The distribution and habitat of Stenus (Hemistenus) audax J. Sahlberg 1900 (Coleoptera, Staphylinidae) in Finland. Entomologica Fennica 2:25-26. |
| Clayhills, T. (1992): Coleoptera finds from the coastal area of the Bothnian Bay. Entomologica Fennica 3:98. |
| Clayhills, T. (1993): Phloeopora opaca Bernhauer (Coleoptera, Staphylinidae) new to Finland. Entomologica Fennica 4:16. |
| Clayhills, T. (1993): Interesting Coleoptera finds from southwestern Finland. Entomologica Fennica 4:17 |
| Clayhills, T. (1996): On the identity of Bledius fontinalis (Coleoptera, Staphylinidae) and its distribution in Finland. Entomologica Fennica 7:67-68. |
| Clayhills, T. (1997): Interesting finds of Coleoptera from the SW Finnish Archipelago. Entomologica Fennica 7:186. |
| Koponen, S., Rinne, V. & Clayhills, T. (1997): Arthropods on oak branches in SW Finland, collected by a new trap type. Entomologica Fennica 8:177-183. |
| Rinne, V., Clayhills, T. & Koponen, S. (1998): On invertebrates of protected oak groves in southwestern Finland. Metsähallituksen luonnonsuojelujulkaisuja A:76 pp. (In Finnish, with English summary). |
| Clayhills, T. (2000): On the occurrence of the genus Hyperaspis (Col. Coccinellidae) in Fenno- Scandian countries. Entomologica Fennica 11:109-112 +errata 13:182. |
| Clayhills, T., Rinne, V. & Koponen, S. (2000): Arthropods in the Southwestern National Park: beetles, bugs and spiders in heritage landscapes and sandy islands. Metsähallituksen luonnonsuojelujulkaisuja A:87 pp. (In Finnish with English summary). |
| Clayhills, T. (2002): The occurrence of the long-horned beetles Stenostola ferrea (Schrank) and S. dubia (Laicharting) in Finland (Coleoptera, Cerambycidae). Sahlbergia 7.2:100. (In Finnish with English summary). |
| Clayhills, T. (2002): Interesting finds of beetles from Finland 1998 (Coleoptera). Sahlbergia 7.2:101. (In Finnish with English summary). |
| Smetana, A. & Clayhills, T. (2004): Gabronthus sulcifrons (Scharp, 1889), a new addition to the fauna of Finland and Europe (Coleoptera, Staphylinidae). Entomologisk tidskrift 125:121-123. |
| Clayhills, T. (2008): Aleochara haematoptera Kraatz, 1858 (Coleoptera, Staphylinidae) found in Finland. Sahlbergia 14.2:53 |