Liriomyza brassicae (Riley)

Eiseman, Charles S. & Lonsdale, Owen, 2018, New state and host records for Agromyzidae (Diptera) in the United States, with the description of thirty new species, Zootaxa 4479 (1), pp. 1-156 : 48-49

Liriomyza brassicae (Riley)

( Fig. 137 )

Material examined. CALIFORNIA: Lassen National Forest, 1.vii.2015, em. 20–25.vii.2015, E. LoPresti, ex Streptanthus tortuosus , #CSE1856, CNC564704 , CNC564705 (1♂ 1♀) ; NORTH CAROLINA: Scotland Co., Laurinburg, St. Andrews University, 26.iv.2016, em. 18.v.2016, T.S. Feldman, ex Lepidium virginicum , #CSE2470, CNC653934 (1♀) .

Tentatively identified material. NEW YORK: Essex Co., Upper Jay , by Ausable River, East Branch, 2.vi.2012, em. by 23.vi.2012, C.S. Eiseman, ex Cardamine diphylla (1♀) ; NORTH CAROLINA: Durham Co., Durham, Pelham Road , 21.vi.2017, em . 8.vii.2017, T.S. Feldman, ex Cleome hassleriana , #CSE3909, CNC939820 (1♀).

Hosts. Asteraceae : Ambrosia acanthicarpa Hook. ( Goeden and Ricker 1974) , A. psilostachya DC. (Lonsdale 2011); Brassicaceae : Alliaria petiolata (M. Bieb.) Cavara & Grande ( Lonsdale 2017) , Arabidopsis arenicola (Richardson ex Hook.) Reidar Elvin et al. ( Spencer 1969) , Barbarea vulgaris W.T. Aiton ( Tavormina 1982) , Brassica napus L., B. nigra (L.) W.D.J. Koch, B. oleracea L., B. rapa L., Erysimum inconspicuum (S. Watson) MacMill. , Lepidium virginicum L., Raphanus sativus L., Rorippa palustris (L.) Besser, Sinapis arvensis L., Sisymbrium altissimum L., * Streptanthus tortuosus Kellogg , Thlaspi arvense L. ( Tavormina 1982); Cleomaceae : Cleome spinosa Jacq. ( Spencer & Stegmaier 1973) ; Tropaeolaceae : Tropaeolum L. ( Stegmaier 1967a). The origin of Spencer & Steyskal’s (1986) record of Capparis L. ( Capparaceae ) is unclear; those of Nasturtium R. Br. (Brassicaceae) and Cleome gynandra L. (as “ Gynandropsis ”) are from Hawaii ( Stegmaier 1967a). Specimens reared from Lantana camara L. ( Verbenaceae ) in California and Mexico possibly represent a distinct species, given the unusual host, adult morphology, and larvae said to form blotch mines rather than linear as is typical of Liriomyza brassicae (Lonsdale 2011) . Spencer (1969) reported the following additional hosts for L. brassicae based only on leaf mines: Brassicaceae : Berteroa incana (L.) DC., Erysimum asperum (Nutt.) DC., Lepidium densiflorum Schrad., Lobularia maritima (L.) Desv.; Cleomaceae : “ Cleome gigantea ”; Tropaeolaceae : Tropaeolum majus L. Our tentatively identified females were reared from Cardamine diphylla (Michx.) Alph. Wood (Brassicaceae) and Cleome hassleriana Chod. (Cleomaceae) .

Leaf mine. ( Fig. 137 ) Whitish, linear; often rather contorted and sometimes partially forming a secondary blotch. The frass is black, typically in more or less connected threads. In our Lepidium mines the frass was mostly in beaded strips, in some cases deposited in discrete, well-spaced grains toward the end. Portions of the mines on Cardamine were on the lower leaf surface.

Puparium. Yellow; formed outside the mine.

Distribution. Widespread in Nearctic, Neotropical, Oriental, Afrotropical, and Australasian Regions; Europe; Arabian Peninsula; Japan (Lonsdale 2011).

Comments. These are the first records of a North American agromyzid from Cardamine , and of any agromyzid from Streptanthus .

Figures

FIGURES 133–143. leaf mines; 133: Liriomyza arctii Spencer in Ƒerbesina alternifolia; 134: L. asclepiadis Spencer in Asclepias exaltata; 135: L. baccharidis Spencer in Erigeron annuus, lower surface (left) and upper surface (right); 136: L. blechi Spencer in Plantago virginica; 137: L. brassicae (Riley) in Lepidium virginicum; 138: L. eupatoriella Spencer in Ageratina altissima; 139: L. eupatoriella in Ƒernonia baldwinii; 140: L. eupatorii (Kaltenbach) in Baccharis halimifolia; 141: L. fricki Spencer in Trifolium repens; 142: L. galiivora (Spencer) in Galium circaezans (transmitted light); 143: L. ivorcutleri spec. nov. in Silphium perfoliatum.