Liriomyza zinniae Spencer,

Eiseman, Charles S. & Lonsdale, Owen, 2019, New State and Host Records for Agromyzidae (Diptera) in the United States, with the Description of Ten New Species, Zootaxa 4661 (1), pp. 1-39: 16-17

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Liriomyza zinniae Spencer


Liriomyza zinniae Spencer 

( Figs 23, 24View FIGURES 14–26, 53, 54View FIGURES 46–56)

Material examined. ARIZONA: Maricopa Co., Tonto National Forest, east of Tortilla Flat , 6.iii.2017, em. 18– 22.iii.2017, C.S. Eiseman, ex Bahiopsis parishii  , #CSE3235, CNC940430View Materials,  CNC940431View Materials (1³ 1♀)  ; same collec- tion data, em. 19.iii.2017, #CSE3251, CNC940429View Materials (1♀)  ; CALIFORNIA: Imperial Co., Ocotillo, Shell Canyon , 7.iii.2017, em. 17–18.iii.2017, C.S. Eiseman, ex Encelia farinosa  , #CSE3217, CNC940100View Materials,  CNC940101View Materials (2³)  ; Palo Verde, Milpitas Wash Rd. (33.39528, -114.91337), 6.iii.2017, em. 18.iii.2017, C.S. Eiseman, ex Encelia farinosa  , #CSE3234, CNC940075View Materials (1³)GoogleMaps  ; TEXAS: Edwards Co., 1.3 mi NW of Camp Wood , 16.iii.2017, em. 9.iv.2017, C.S. Eiseman, ex Viguiera dentata  , #CSE3429, CNC941273View Materials  (1³).

Tentatively identified material. CALIFORNIA: San Diego Co., Hawk Canyon , 11.iii.2017, em. 21.iii.2017, C.S. Eiseman, ex Geraea canescens  , #CSE3256, CNC940066View Materials (1♀)  ; TEXAS: Edwards Co., 1.3 mi NW of Camp Wood, 16.iii.2017, em. 23.iii.2017, C.S. Eiseman, ex Verbesina virginica  , #CSE3284, CNC941274View Materials (1♀)  .

Hosts. Asteraceae  : Ambrosia psilostachya  DC., * Bahiopsis parishii (Greene) E.E. Schill. & Panero  , Calendula  L., Encelia californica Nutt., E.  * farinosa A. Gray ex Torr.  , Heterotheca grandiflora Nutt.  , * Viguiera dentata (Cav.) Spreng.  , Zinnia elegans Jacq.  (Spencer 1981; Lonsdale 2011). Our tentatively identified females were reared from Geraea canescens Torr. & A. Gray  and Verbesina virginica L. 

Leaf mine. ( Figs. 53, 54View FIGURES 46–56) Upper surface; greenish to whitish; entirely linear, with black frass in alternating strips (sometimes beaded or separated into closely spaced grains).

Puparium. ( Fig. 24View FIGURES 14–26) Brown (yellow in one instance); formed within the leaf, in a roughly circular blister on the lower surface.

Distribution. USA: AZ, CA, * TX.

Comments. The pupation mode of this species has not been reported previously. Although the habit of forming an upper surface mine and then pupating just beneath the lower epidermis is common in Ophiomyia  and Phytomyza  , it is highly unusual in Liriomyza  . It is also often, though not universally, exhibited by L. trifoliearum Spencer ( Eiseman & Lonsdale 2018)  and L. trixivora  (this paper). We found all three species in a harsh desert environment where pupating in this way would seem to be a useful adaptation; a larva dropping to the ground may have difficulty locating a pupation site where it will be safe from heat and desiccation.

Although males are needed for identification of this species, we list the specimens from Geraea  and Verbesina  here because they were reared from brown puparia in blisters on the lower leaf surface like those formed by L. zinniae  . Both host plants are in the tribe Heliantheae, which includes all of L. zinniae  ’s known hosts except for Calendula  ( Calenduleae  ) and Heterotheca  ( Astereae  ). The Verbesina  specimen was also collected within 100m or so of the Viguiera dentata  mines from which a male was reared.


Museu Carlos Machado


Chicago Academy of Sciences