Calycomyza platyptera ( Thomson, 1869 )

Monteiro, Nilton Juvencio Santiago, Barbosa, Rodrigo Rendeiro & Esposito, Maria Cristina, 2019, Agromyzidae (Diptera: Schizophora) in the state of Pará: new species and new records in Brazil, Zootaxa 4624 (2), pp. 151-182 : 167-168

Calycomyza platyptera ( Thomson, 1869)

Agromyza platyptera Thomson, 1869: 608 .

Phytobia (Calycomyza) platyptera, Frick, 1952: 395

Calycomyza platyptera, Spencer, 1981: 307 .

Diagnosis. Wing length 1.5–2 mm. Fronto-orbital plate predominantly yellowish, darkened to upper fronto-orbital seta; face black in upper half, yellowish below; pedicel brown; legs brown; calypter yellowish, fringe yellowish. Aedeagus (Fig. 878 and 879 in Spencer & Steyskal 1986): basiphallus slightly sclerotized; mesophallus elongated, wider basally; reniform sclerite present between mesophallus and distiphallus; distiphallus short, forming two lobes and with paired distal processes.

Host-plants. Asteraceae— Ambrosia artemisiifolia L., Arctium sp., Artemisia douglasiana Besser , Artemisia ludoviciana Nutt. , Artemisia vulgaris L., Bidens Pilosa L. , Baccharis salicifolia (Ruiz & Pav.) Pers. , Erigeron sp., Erigeron canadensis L., Gamochaeta pensylvanica (Willd.) Cabrera , Grindelia squarrosa (Pursh) Dunal , Helianthus annuus L., Helianthus exilis A. Gray , Heterotheca grandiflora Nutt. , Iva frutescens L., Mikania micrantha Kunth , Mikania scandens (L.) Willd., Silphium laciniatum L., Silphium perfoliatum L., Solidago caesia L., Soli- dago tortifolia Elliot., Symphyotrichum simmondsii (Small) G.L. Nesom , Xanthium strumarium L., Zinnia elegans (Jacq.) .

Distribution. Argentina, Brazil, Canada, Cuba, Ecuador, Guadeloupe, Jamaica, USA.

Material examined. BRAZIL, Pará state, Belém: Campus de Pesquisa do Museu Paraense Emílio Goeldi , 1º26′56.3″S, 48º26′43.2″W, 21-IX-1991, M.C. Esposito [collector], ex leaf of Zinnia elegans (4 ♂); same location, 21-IX-1991, M.C. Esposito [collector], ex leaf of Zinnia elegans (3 ♀) .

Comments. Calycomyza platyptera has already been associated to 19 genera of host-plants belonging to the Asteraceae family ( Benavent-Corai et al. 2005; Eiseman & Lonsdale 2018), forming blotches on the surface of the leaf. The yellowish fronto-orbital plate, white calypter and fringe, legs completely brown and the tubular aedeagus are helpful to distinguish C. platyptera from many others species of Calycomyza . Among species of this genus with a tubular aedeagus, especially that mining Asteraceae , C. platyptera has an aedeagus similar to C. obscura Spencer , C. promissa (Frick) , C. minor (Spencer) e C. solidaginis (Kaltenbach) , distinguished by the sclerotized extensions present apically in the distiphallus. This set of characteristics are useful to distinguish C playtera from others species of Calycomyza .