© Norwegian Journal of Entomology. 12 December 2017

Plant bugs on Tanacetum vulgare with tanaceti (Fallén, 1807) new to Norway (, , )

THOR JAN OLSEN, JØRN R. GUSTAD, CARL-CEDRIC COULIANOS & SIGMUND HÅGVAR

Olsen, T.J., Gustad, J.R., Coulianos, C.-C. & Hågvar, S. 2017. Plant bugs on Tanacetum vulgare with Megalocoleus tanaceti (Fallén, 1807) new to Norway (Hemiptera, Heteroptera, Miridae). Norwegian Journal of Entomology 64, 130–133.

The plant bug Megalocoleus tanaceti (Fallén, 1807) (Hemiptera, Heteroptera, Miridae) is reported new to Norway. It has probably colonised the county Østfold from Sweden. Since the species is morphologically similar to two other Miridae living on the host plant Tanacetum vulgare L., a short identification key is presented to separateM. tanaceti from M. molliculus (Fallén, 1807) and punctipes Reuter, 1875. The Norwegian distribution of the three species is given.

Key words: Heteroptera, Megalocoleus tanaceti, Tanacetum vulgare, Norway.

Thor Jan Olsen, P.O. Box 1062 Valaskjold, NO-1705 Sarpsborg, Norway. E-mail: [email protected]

Jørn R. Gustad, Faculty of Business Administration and Social Sciences, Molde University College - Specialized University in Logistics, P.O. Box 2110, NO-6402 Molde, Norway. E-mail: [email protected]

Carl-Cedric Coulianos, Kummelnäsvägen 90, SE-13237 Saltsjö-Boo, Sweden. E-mail: [email protected]

Sigmund Hågvar, Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, NO-1432 Ås, Norway. E-mail: [email protected]

Introduction Reuter, 1875. The last two species are monophagous on Tanacetum vulgare, The perennial plant Tanacetum vulgare L. has the first breeds mainly on L. many visitors when it is flowering in July– and also on other including Tanacetum September. Among them are several species of vulgare. true bugs, especially from the families Miridae, All three species are phytophagous and feeds Rhopalidae and Pentatomidae. Most of them are on buds, leaves and flowers of their food plants. plant bugs (Miridae), and in southern Sweden, They overwinter as eggs inserted in the upper 21 species from this family regularly visit this parts of the stems of their breeding plant. Adults of plant. Most of them are using it only as a food O. punctipes can be found from mid-June to early plant, but the following three species belonging September, M. molliculus from late June to early to the tribe are more closely associated September and M. tanaceti from early July to the with it and have Tanacetum vulgare as their end of September. (Kullenberg 1944, Wachmann breeding plant: (Fallén, et al. 2003, Skipper 2013). 1807), Megalocoleus tanaceti (Fallén, 1807) and M. molliculus and O. punctipes have since

130 Norwegian Journal of Entomology 64, 130–133 (2017) long been recorded from Norway and we here report M. tanaceti as new to Norway.

Material and methods

A male and a female of Megalocoleus tanaceti were sweep-netted 10 August 2013 on the tip of Øra peninsula, Fredrikstad, Østfold, EIS 20 (N59.17877, E10.9679) (leg. et coll. J.R. Gustad). The habitat was strongly influenced by disposed soil and gravel, but rich in various flowers. Another pair was taken by sweep-netting the next day, 11 August 2013, in Vistergropa, Sarpsborg, Østfold, EIS 20 (N59.29322, E9.53925) (leg. et coll. T.J. Olsen). The locality was a rather dry sand quarry, which contained plenty of its host plant, Tanacetum vulgare. The species seems to be established here, since one additional specimen was found 5 September 2015, and two specimens on 17 August 2016 (leg. et coll. T.J. Olsen). An identification key to adults are given in Table 1.

Discussion FIGURE 2. Megalocoleus tanaceti (Fallén, 1807). Photo: Karsten Sund, NHM, Oslo. As can be seen from the distribution maps of M. molliculus and O. punctipes (Figures 4 and 5), the three species associated with Tanacetum vulgare

FIGURE 1. Oncotylus punctipes Reuter, 1875 on FIGURE 3. Megalocoleus molliculus (Fallén, 1807). Tanacetum vulgare L. Photo: Liselotte Sjue. Photo: Geir Drange.

131 Olsen et.al.: Plantbugs on Tanacetum vulgare and Megalocoleus tanaceti new to Norway

TABLE 1. An identification key to adults. The three species mentioned in the introduction Megalocoleus( molliculus (Fallén, 1807), Megalocoleus tanaceti (Fallén, 1807) and Oncotylus punctipes Reuter, 1875) are often found together on the flowers of Tanacetum vulagre. They can be identified by the following key (be aware of specimens with abraded/absent hairs). 1. The black spines on hind tibiae arise from black spots. Bright green with dense black pubescence. Rostrum short, reaching the middle part of the midcoxae ...... Oncotylus punctipes Reuter, 1875 (Figure 1) - The black spines on hind tibiae do not arise from black spots ...... 2 2. Upper side greenish-yellow (females) or orange (males) with slight grey mottling. Pubescence of long, black hairs. Rostrum not reaching beyond hind coxae ...... Megalocoleus tanaceti (Fallén, 1807) (Figure 2) - Upper side variably pale yellowish-green with diffuse darker mottling. Pubescence of fine, brown-light brown hairs. Rostrum reaching the middle of the abdomen ...... Megalocoleus molliculus (Fallén, 1807) (Figure 3)

18 9 18 9 8 8 8 8 1 8 5 1 8 5 18 7 1 18 7 1 86 1 84 86 1 84 1 83 1 83 1 78 1 78 1 82 1 1 82 1 1 17 7 1 17 7 1 8 6 1 8 6 1 80 17 69 1 80 17 69 1 79 75 1 1 79 75 1 1 68 1 68 1 74 1 1 74 1 17 3 17 3 1 72 7 1 72 7 17 1 1 6 6 0 17 1 1 6 6 0 17 0 1 66 1 17 0 1 66 1 1 6 5 1 6 5 1 6 4 59 1 6 4 59 16 3 1 16 3 1 1 62 1 58 1 62 1 58 16 1 1 57 16 1 1 57 1 56 1 56 1 55 1 51 1 55 1 51 1 54 15 0 1 54 15 0 1 52 15 3 14 9 1 52 15 3 14 9 48 48 1 47 1 1 47 1 45 14 6 45 14 6 1 43 1 44 1 1 43 1 44 1 1 1 42 1 1 42 40 1 4 40 1 4 3 8 13 9 1 3 8 13 9 1 13 6 1 37 1 13 6 1 37 1 4 1 35 4 1 35 1 33 1 3 1 33 1 3 2 2 0 1 31 1 3 0 1 31 1 3 12 9 13 12 9 13 2 7 12 8 2 7 12 8 1 25 12 6 1 1 25 12 6 1

3 12 4 3 12 4 12 1 12 2 12 12 1 12 2 12 11 9 12 0 11 9 12 0 11 7 1 18 11 7 1 18 16 16 1 1 3 1 14 1 15 1 1 1 3 1 14 1 15 1 1 12 1 12 1 0 9 1 10 1 11 1 0 9 1 10 1 11

1 0 5 1 06 1 07 1 08 1 0 5 1 06 1 07 1 08 4 4 1 0 0 1 0 1 1 02 1 03 1 0 1 0 0 1 0 1 1 02 1 03 1 0

9 5 9 6 97 9 8 9 9 9 5 9 6 97 9 8 9 9

9 0 9 1 92 9 3 9 4 9 0 9 1 92 9 3 9 4

8 3 8 4 85 8 6 8 7 8 8 8 9 8 3 8 4 85 8 6 8 7 8 8 8 9

7 5 7 6 7 7 7 8 7 9 80 81 8 2 7 5 7 6 7 7 7 8 7 9 80 81 8 2

6 6 67 6 8 6 9 70 7 1 7 2 7 3 7 4 6 6 67 6 8 6 9 70 7 1 7 2 7 3 7 4

5 7 5 8 5 9 6 0 6 1 6622 6 3 6 4 6 5 5 7 5 8 5 9 6 0 6 1 62 6 3 6 4 6 5

4 8 49 5 0 5 1 5 2 5 3 545 4 555 5 5 6 4 8 49 5 0 5 1 5 2 5 3 5 4 555 5 5 6

3 9 4 0 41 4 2 4 3 4 4 454 5 4 6 4 7 3 9 4 0 41 4 2 4 3 4 4 4 5 4 6 474 7

30 3 1 3 2 3 3 34 35 363 6 3737 338 8 30 3 1 3 2 3 3 34 3535 363 6 37 3 8

22 2 3 2 4 2 5 26 27 2828 292 9 22 2 3 2 4 2 5 26 27 2828 2 9

13 1 4 1 5 16 17 181 8 191 9 202 0 2 1 13 1 4 1 5 16 17 181 8 191 9 2 0 2 1

7 8 9 1 0 111 1 12 7 8 9 1 0 1 1 12

3 4 5 66 3 4 5 66

1 122 1 12

FIGURE 4. Distribution of Megalocoleus molliculus FIGURE 5. Distribution of Oncotylus punctipes (Fallén, 1807) in Norway. Reuter, 1875 in Norway. are recorded in Norway only from the SE part of (Warloe 1927) and of Megalocoleus molliculus the country, indicating that they have arrived from from Aker in Oslo 18. July 1845 (Siebke SW Sweden where the species are common. As the 1874). Although the main host plants are county of Østfold is one of the best investigated widely distributed in Norway, up to Finnmark, parts of Norway regarding Heteroptera, it can it is notable that these species still are recorded be assumed that M. tanaceti has arrived to the only from SE Norway. This cannot depend on country rather recently. underrecording as other parts of the country, for On the other hand, the two other Tanacetum- instance the Bergen-area, are well investigated. associated species have been known from Norway Climatic factors can hardly be limiting as these for a long time. The first record of Oncotylus species are widely distributed in Sweden, where punctipes is from Drammen 5 September 1924 the two Megalocoleus-species are commonly

132 Norwegian Journal of Entomology 64, 130–133 (2017) found northwards to the province of Norrbotten Kullenberg, B. 1944. Studien über die Biologie der and Oncotylus punctipes to the province of Capsiden. Zoologiska bidrag från Uppsala Bd. 23, Hälsingland (Coulianos & Ossiannilsson 1976). 1–522. The situation in Norway calls for further Siebke, H. 1874. Enumeratio Insectorum Norvegi- investigation and we recommend collectors and corum. Fasc.1. Catalogum Hemipterorum et Orthopterorum continens. Univ.-program for andet observers to search for these species on Tanacetum semester 1874, I–XII, 1–60. vulgare and Achillea millefolium. Skipper, L. 2013. Danmarks blomstertæger. Danmarks Dyreliv 12. Apollo Booksellers, 407 pp. Wachmann, E., Melber, A. & Deckert, J. 2003. Wanzen References Bd. 2. Die Tierwelt Deutschlands 75. Teil. Goecke & Evers, Keltern. 288 pp. Coulianos, C.-C. & Ossiannilsson, F. 1976. Catalogus Warloe, H. 1927. Nye fund og findesteder. Hemiptera. Insectorum Sueciae. Hemiptera-Heteroptera. 2nd Ed. Norsk Entomologisk Tidsskrift 2 (3), 153–156. Entomologisk Tidskrift 97, 135–173. Received: 26 October 2017 Accepted: 10 November 2017

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