Agromyza ambrosivora Spencer

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 : 7-8

publication ID

https://doi.org/ 10.11646/zootaxa.4479.1.1

publication LSID

lsid:zoobank.org:pub:93C84828-6EEF-4758-BEA1-97EEEF115245

DOI

https://doi.org/10.5281/zenodo.5997581

persistent identifier

https://treatment.plazi.org/id/03D287EF-FFA6-E44D-A8E5-54D64029FD65

treatment provided by

Plazi

scientific name

Agromyza ambrosivora Spencer
status

 

Agromyza ambrosivora Spencer View in CoL

( Fig. 64 View FIGURES 63–74 )

Material examined. COLORADO: Chaffee Co., Poncha Springs , South Arkansas River, 8.vii.2015, em . 28.vii– 1.viii.2015, C.S. Eiseman, ex Helianthus annuus , #CSE1872, CNC654328–654332 (1♂ 4♀); MASSACHUSETTS: Worcester Co., Sturbridge, Leadmine Rd. , 6.vii.2013, em . 20.vii.2013, C.S. Eiseman, ex Ambrosia artemisiifolia , #CSE725, CNC392679 View Materials , CNC392680 View Materials (2♀); PENNSYLVANIA: Chester Co., Pottstown , Warwick County Park , 10.viii.2014, em . 2.ix.2014, N. D. Charney, ex Ambrosia trifida , #CSE1371, CNC384846 (1♂).

Hosts. Asteraceae : Ambrosia artemisiifolia L., A. * trifida L., * Helianthus annuus L. Some specimens from Los Angeles and Ventura Counties, California, were caught at sites where Artemisia douglasiana Besser was one of the dominant plants, and Spencer (1981) stated that it therefore seems probable that this was the host. He noted that Ambrosia is not known in these counties, but the genus is now known from both counties and several Helianthus species are also present (USDA, NRCS 2017).

Leaf mine. ( Fig. 64 View FIGURES 63–74 ) On Ambrosia artemisiifolia , “several larvae frequently feeding together to form a blackish leaf-mine, which extends from the apex of the pinnately divided leaves towards the midrib” ( Spencer 1969). In our example the apices of three lobes were disfigured by the mine. The mine on A. trifida was a brown blotch in the angle between the midrib and a lateral vein; there was a narrow initial linear portion that had been mostly obliterated. The mines on Helianthus ( Fig. 64 View FIGURES 63–74 ) began near the leaf margin in the basal half of the leaf blade and followed the margin apically, widening gradually.

Puparium. Brown; formed outside the mine.

Distribution. USA: CA, *CO, *MA, MD ( Scheffer et al. 2007), NY ( Scheffer & Lonsdale 2018), *PA; Canada: ON.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Agromyzidae

Genus

Agromyza

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