Otiorhynchus porcatus (Herbst, 1795)

Hoebeke, E. Richard & Griffin, Sean R., 2015, First Record of the Palearctic Root WeevilOtiorhynchus porcatus (Herbst) (Coleoptera: Curculionidae: Entiminae) in The United States and Additional Records of Other Adventive Weevils Occurring on the Isles of Shoals (Maine and New Hampshire), The Coleopterists Bulletin 69 (4), pp. 679-686 : 680

Otiorhynchus porcatus (Herbst, 1795) ( Curculionidae : Entiminae ) ( Fig. 1)

Specimens Examined. M A I N E: A p p l e d or e Island (42.989167°, − 70.6144°), 12 June (1), 22 June (2). New country record. Specimens were taken from pitfall traps.

Remarks. Otiorhynchus porcatus is one of 14 non-native root weevils of the genus Otiorhynchus Germar established in North America (Bright and Bouchard 2008). It is widespread across much of central and northern Europe (Alonso-Zarazaga 2013; Majka and MacIvor 2009). In North America, O. porcatus is known from eastern Canada: Ontario (Killarney), Québec (Montréal), Newfoundland (Conception Bay and St. John’ s, Avalon Peninsula), and Nova Scotia (Halifax) (Bright and Bouchard 2008; Majka and MacIvor 2009). An online image of O. porcatus (bugguide.net/node/view/474181; accessed 5 August 2015) from Coquitlam, British Columbia, photographed in 2010, represents the first Pacific Northwest record.

Among all other immigrant species of Otiorhynchus established in North America, O. porcatus ( Fig. 1) is uniquely characterized by the strongly elevated and tuberculate alternate elytral interstriae and by the strongly tuberculate pronotum (Bright and Bouchard 2008).

Majka and MacIvor (2009) reported O. porcatus as a component of the insect fauna of green roof sites and adjacent areas in Halifax, Nova Scotia, on two collection dates in June and October 2009. Potential host plants likely include Solidago canadensis L. and Solidago rugosa Mill. ( Asteraceae ), Lonicera canadensis W. Bartrum ex Marshall ( Caprifoliaceae ), and Lysimachia punctata L. ( Primulaceae ) at these sites. In Europe, O. porcatus is polyphagous on plants of several families, including Asteraceae , Rosaceae , and Saxifragaceae . The phenology of O. porcatus in Halifax, Nova Scotia is illustrated by Majka and MacIvor (2009).

Perapion curtirostre (Germar, 1817) ( Brentidae : Apioninae )