Liriomyza zinniae Spencer

Lonsdale, Owen, 2011, The Liriomyza (Agromyzidae: Schizophora: Diptera) of California 2850, Zootaxa 2850 (1), pp. 1-123 : 113-119

Liriomyza zinniae Spencer

Figs 252–255

Liriomyza zinniae Spencer 1981: 287 . Spencer & Steyskal 1986: 131.

Wing length 1.9–2.1mm (♂), 2.0– 2.1mm (♀). Length of ultimate section of vein CuA 1 divided by penultimate section: 2.1–2.7. Eye height divided by gena height: 4.0–5.2. Scutum glossy.

Chaetotaxy: Two ori (anterior bristle sometimes reduced), two ors. Acrostichal setulae in four rows.

Colouration: Calypter margin and hairs brown. Head yellow with first flagellomere becoming darker (but not brown) apically, posterolateral corner of frons dark brown to base, or just past base of outer vertical bristle (sometimes lighter brown to base of inner vertical bristle), and clypeus and ocellar triangle dark brown. Scutum with complete yellow lateral stripe; katatergite yellow with anterior margin brown; anatergite brown, becoming dark below scutellum and yellow dorsally beside scutellum. Anepisternum with thin to broad oblique stripe; anepimeron predominantly brown or with striping on posterior margin and anterior half; meron brown with dorsal and posterior margins yellow; katepisternum brown on ventral ¾ (not including base of bristle). Legs yellow with base of fore and mid coxae brown, and basal half of hind coxa brown, base of femora brown, tibiae light brown, becoming paler to base (entirely dark brown in AZ material), and tarsi light brown (brown in AZ material), becoming paler to base. Abdominal tergites brown with lateral and posterior margins yellow.

Genitalia: Figs 252–255 . Surstylus with two widely spaced spines. Basiphallus with one pair of large triangular distolateral processes that may be homologous with paraphalli. Swollen distal section of duct long, thin, and not strongly narrowed apically. Hypophallus long, flat, dark and bare, directed posteroventrally. Mesophallus approximately as long as wide and separate from distiphallus; mesophallus and distiphallus with complete ventral suture. Distiphallus length nearly twice width and strongly narrowed to base (pronounced in lateral view); well-sclerotized basolaterally and thin-walled apically, enclosing one pair of spinulose structures. Ejaculatory apodeme with pileus ejaculatorius relatively broad and pale; blade narrow, gradually blending into stem; blade paler apically with dark apical margin.

Hosts. Asteraceae — Ambrosia psilostacha *, Encelia californica , Heterotheca grandiflora , Zinnia elegans ,

Zinnia sp.

Range. USA. Arizona *, California [Alameda, Contra Costa, Los Angeles*, Orange *, San Diego*, Santa Cruz, Ventura*].

Type material. Holotype, USA. California: Alameda Co., Albany , 14.viii.1948, ex larva on Zinnia elegans, Lot 82-1, K.E. Frick, Type No. 13944 (1♂, CASC) ; Paratypes examined, USA. California: Alameda Co., Berkeley, 2.xi.1948, ex. larva Zinnia elegans, Lot No. 82-8, K.E. Frick (1♀, CASC), Santa Cruz Co., Mount Hermon , 12.vii.1948, ex. larva Heterotheca grandiflora Nutt. Lot No. 53-4 (1♀, CASC) .

Additional material examined. USA. Arizona: Tucson, Saguara Mon , 10.iv.1935, A.L. Melander (2♂, USNM) , California: Los Angeles Co., Los Angeles , 23.viii.1940, Zinnia serpentine miner, R. M. Bohart (3♂, USNM) , Westwood, Westwood Hills , R. M. Bohart, ix.1940, x Zinnia serp. mine (3♂, UCR) , 5.ix.1940, ex Zinnia serpentine (1♀, UCR) , ix.1941, x Encelia californica (2♂ 2♀, UCR) , Orange Co., Laguna Beach , 28.iii.1935, A.L. Melander (1♂, USNM) , San Diego Co., San Diego , 28.iii.1947, W.W. Jones (1♂, EMEC) , Encelia californica (1♂, EMEC) , Ventura Co., Ventura , insectary reared on Ambrosia psilostachys Decandolle , 16.iv.1969 (2♂, UCR) , 30.vi.1969 (3♀, UCR) .

Comments. Liriomyza zinniae , here recorded for the first time outside of California, is most similar in external morphology to specimens of L. sabaziae and L. sativae , but the large, flat, dark hypophallus will easily identify it.

Figures

FIGURES 252–255. Liriomyza zinniae Spencer, male genitalia; 252: ejaculatory apodeme; 253: external components, ventral; 254: phallus, left lateral; 255: phallus, ventral.