Chromatomyia 'atricornis' auctt.
[Diptera: Agromyzidae]


Phytomyza syngenesiae group; Spencer, 1972. Handbk ident. Br. Ins. 10(5g): 113.
Chromatomyia 'atricornis' auctt.; Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 386.


Leaf-mine: See syngenesiae (Hardy) and horticola (Goureau).

Larva: See syngenesiae (Hardy) and horticola (Goureau).

Puparium: See syngenesiae (Hardy) and horticola (Goureau).

Comments: Two highly polyphagous species of Chromatomyia, with indistinguishable mines, have been recorded in Britain. These are syngenesiae (Hardy) and horticola (Goureau). Griffiths (1967b), after critical examination of male genitalia, confirmed that the hosts of syngenesiae are almost exclusively genera of Asteraceae, with just two exceptions, one on Daucus [Apiaceae] in Denmark and the other on Pisum [Fabaceae] in California, U.S.A. C. horticola mines numerous plant families including Asteraceae. The two species can only be distinguished by the structure of the male genitalia.

British records of syngenesiae, horticola or 'atricornis' on hosts other than Asteraceae in Britain, are assumed to represent horticola.

British records of horticola and syngenesiae on Asteraceae hosts not based on examination of the genitalia of associated males are treated here as Chromatomyia 'atricornis' and may represent either horticola or syngenesiae..

Hosts cited here include 55 plant genera in the family Asteraceae worldwide and 31 plant genera in Britain.

As the mines of horticola and syngenesiae are indistinguishable, the chalcidoid parasitoids recorded from these two species are listed below, as 'atricornis', horticola and/or syngenesiae.

Chrysanthemum segetum is treated as Glebionis segetum (Corn Marigold) and Picris echioides is treated as Helminthotheca echioides (Bristly Oxtongue) by Stace (2010).

Hosts in Britain:

Asteraceae      
Achillea filipendulina Fern-leaf Yarrow Robbins, 1991: 115, as horticola
Achillea millefolium Yarrow Robbins, 1991: 115, as horticola
Achillea millefolium Yarrow Spencer, 1972: 111, as syngenesiae
Achillea ptarmica Sneezewort Robbins, 1991: 115, as horticola
Achillea ptarmica Sneezewort Mines in BMNH
Achillea ptarmica Sneezewort Spencer, 1972: 111, as syngenesiae
Achillea sibirica   Mines in BMNH
Ageratum houstonianum Flossflower Mines in BMNH
Anthemis     Pitkin and Plant
Anthemis cotula Stinking Chamomile Mines in BMNH
Anthemis cotula Stinking Chamomile Spencer, 1972: 111, as syngenesiae
Arctium     Robbins, 1991: 119, as syngenesiae
Arctium lappa Greater Burdock Spencer, 1972: 111, as syngenesiae
Argyranthemum     Pitkin and Plant
Artemisia     Robbins, 1983: 25, as horticola
Artemisia absinthium Wormwood Mines in BMNH
Artemisia vulgaris Mugwort Mines in BMNH
Artemisia vulgaris Mugwort Spencer, 1972: 111, as syngenesiae
Artemisia vulgaris Mugwort Robbins, 1991: 119, as syngenesiae
Aster novae-angliae Hairy Michaelmas-daisy Mines in BMNH
Aster novae-angliae Hairy Michaelmas-daisy Spencer, 1972: 111, as syngenesiae
? Bidens     Robbins, 1991: 109, as horticola
Bidens cernua Nodding Bur-marigold Mines in BMNH
Bidens tripartita Trifid Bur-marigold Mines in BMNH
Bidens tripartita Trifid Bur-marigold Spencer, 1972: 112, as syngenesiae
Centaurea     Robbins, 1983: 25, as horticola
Centaurea     Robbins, 1983-7, as syngenesiae
Centaurea     Robbins, 1991: 122, as horticola
Centaurea cyanus Cornflower Pitkin and Plant, as syngenesiae
Centaurea cyanus Cornflower Spencer, 1972: 112, as syngenesiae
Centaurea montana Perennial Cornflower Robbins, 1991: 122, as horticola
Centaurea jacea Brown Knapweed Mines in BMNH
Centaurea nigra Common Knapweed Mines in BMNH
Centaurea nigra Common Knapweed Spencer, 1972: 112, as syngenesiae
Centaurea scabiosa Greater Knapweed Mines in BMNH
Centaurea scabiosa Greater Knapweed Spencer, 1972: 112, as syngenesiae
Chrysanthemum     Robbins, 1983-7, as syngenesiae
Chrysanthemum     Robbins, 1991: 116, as syngenesiae
Chrysanthemum     Robbins, 1983: 26, as horticola
Chrysanthemum     Robbins, 1991: 116, as horticola
Chrysanthemum argyrophyllum   Pitkin and Plant
Chrysanthemum morifolium   Mines in BMNH
Chrysanthemum parthenium Feverfew Mines in BMNH
Chrysanthemum segetum Corn Marigold Mines in BMNH
Chrysanthemum segetum Corn Marigold Mines in BMNH, as syngenesiae
Cicerbita     Mines in BMNH
Cichorium intybus Chicory Mines in BMNH
Cichorium intybus Chicory Spencer, 1972: 112, as syngenesiae
Cirsium arvense Creeping Thistle Spencer, 1972: 112, as syngenesiae
Cirsium vulgare Spear Thistle Mines in BMNH
Cirsium vulgare Spear Thistle Spencer, 1972: 113, as syngenesiae
Crepis     Robbins, 1991: 124, as horticola
Cynara scolymus Globe Artichoke Pitkin and Plant, as horticola
Dahlia     Robbins, 1991: 109, as horticola
Echinops banaticus Blue Globe-thistle Mines in BMNH
Echinops banaticus Blue Globe-thistle Spencer, 1972: 113, as syngenesiae
Erigeron canadensis Canadian Fleabane Mines in BMNH
Erigeron canadensis Canadian Fleabane Spencer, 1972: 113, as syngenesiae
Eupatorium     Robbins, 1983: 26, as horticola
Eupatorium     Robbins, 1991: 113, as syngenesiae
Eupatorium     Mines in BMNH
Eupatorium cannabinum Hemp-agrimony Spencer, 1972: 113, as syngenesiae
Galinsoga parviflora Gallant-soldier Mines in BMNH
Gazania     Mines in BMNH
Gerbera jamesonii   Pitkin and Plant
Helianthus     Pitkin and Plant
Helianthus rigidus   Mines in BMNH
Hieracium     Spencer, 1972: 87, as syngenesiae
Hieracium     Mines in BMNH
Hieracium umbellatum Umbellate Hawkweed Spencer, 1972: 113, as syngenesiae

? Iva

    Pitkin and Plant
Lactuca     Pitkin and Plant
Lactuca serriola Prickly Lettuce Mines in BMNH
Lactuca virosa Great Lettuce Mines in BMNH
Lapsana     Robbins, 1991: 124, as horticola
Lapsana     Robbins, 1991: 124, as syngenesiae
Lapsana communis Nipplewort Pitkin and Plant
Leucanthemum     Robbins, 1991: 116, as syngenesiae
Leucanthemum x superbum Shasta Daisy Mines in BMNH, as Chrysanthemum maximum
Leucanthemum x superbum Shasta Daisy Robbins, 1991: 116, as horticola on Chrysanthemum maximum
Mycelis     Pitkin and Plant, as atricornis and horticola
Mycelis muralis Wall Lettuce Mines in BMNH
Pericallis hybrida Cineraria Pitkin and Plant
Picris     Pitkin and Plant
Picris echioides Bristly Oxtongue Mines in BMNH

? Pulicaria

dysenterica ? Common Fleabane Pitkin and Plant
Rudbeckia     Robbins, 1983: 26, as horticola
Senecio     Robbins, 1983: 26, as horticola
Senecio     Pitkin and Plant, as atricornis and syngenesiae
Senecio aquaticus Marsh Ragwort Spencer, 1972: 114, as syngenesiae
Senecio cruentatus   Spencer, 1972: 114, as syngenesiae
Senecio erucifolius Hoary Ragwort Pitkin and Plant, as syngenesiae
Senecio jacobaea Common Ragwort Mines in BMNH
Senecio squalidus Oxford Ragwort Mines in BMNH
Senecio squalidus Oxford Ragwort Spencer, 1972: 114, as syngenesiae
Senecio sylvaticus Heath Groundsel Mines in BMNH
Senecio sylvaticus Heath Groundsel Spencer, 1972: 114, as syngenesiae
Senecio vulgaris Groundsel Mines in BMNH
Sonchus     Robbins, 1983: 26, as horticola
Sonchus     Robbins, 1991: 121, as syngenesiae
Sonchus     Robbins, 1991: 121, as horticola
Sonchus arvensis Perennial Sow-thistle Mines in BMNH
Sonchus asper Prickly Sow-thistle Mines in BMNH
Sonchus oleraceus Smooth Sow-thistle Mines in BMNH
Sonchus palustris Marsh Sow-thistle Spencer, 1972: 115, as syngenesiae
Sonchus scorpioides   Mines in BMNH
Tanacetum parthenium Feverfew Mines in BMNH
Tanacetum parthenium Feverfew Robbins, 1991: 117, as horticola
Tanacetum vulgare Tansy Mines in BMNH
Tanacetum vulgare Tansy Robbins, 1991: 117, as horticola
Taraxacum     Mines in BMNH
Taraxacum     Pitkin and Plant, as atricornis and syngenesiae
Taraxacum     Robbins, 1991: 121, as horticola
Taraxacum officinale Dandelion Mines in BMNH
Taraxacum officinale Dandelion Pitkin and Plant, as syngenesiae
Tripleurospermum maritimum x inodora   Spencer, 1972: 114, as syngenesiae group

Hosts elsewhere:

Asteraceae      
Achillea     Spencer, 1990: 301
Ambrosia     Spencer, 1990: 316
Anacyclus     Spencer, 1990: 301
Anaphalis     Spencer, 1990: 273
Anaphalis     Bladmineerders van Europa, as cf. syngenesiae
Andryala     Spencer, 1990: 259
Arctium     Spencer, 1990: 251
Arnica     Bladmineerders van Europa, as cf. syngenesiae
Arnoseris    

Bladmineerders van Europa, as cf. syngenesiae

Anthemis     Bladmineerders van Europa, as cf. syngenesiae
Asteriscus     Bladmineerders van Europa, as cf. syngenesiae
Carlina     Spencer, 1990: 249
Chondrilla     Spencer, 1990: 259
Cicerbita     Spencer, 1990: 259
Cnicus     Spencer, 1990: 251
Cynara     Spencer, 1990: 251
Echinops     Spencer, 1990: 249
Eupatorium     Spencer, 1990: 289
Filago     Spencer, 1990: 273
Guizotia     Spencer, 1990: 316
Hieracium     Spencer, 1990: 259
Hypochaeris     Spencer, 1990: 259
Iva     Spencer, 1990: 316
Jurinea     Spencer, 1990: 251
Lapsana     Spencer, 1990: 259
Leontodon     Spencer, 1990: 259
Leontopodium     Spencer, 1990: 273
Mycelis     Spencer, 1990: 259
Onopordum     Spencer, 1990: 251
Pulicaria     Spencer, 1990: 273
Reichardia     Spencer, 1990: 259
Santolina     Spencer, 1990: 301
Saussurea     Spencer, 1990: 251
Serratula     Spencer, 1990: 251
Telekia     Spencer, 1990: 273
Tragopogon     Spencer, 1990: 259
Xanthium     Spencer, 1990: 316

Time of year - mines: See syngenesiae (Hardy) and horticola (Goureau).

Time of year - adults: See syngenesiae (Hardy) and horticola (Goureau).

Distribution in Great Britain and Ireland: See syngenesiae (Hardy) and horticola (Goureau).

Distribution elsewhere: See syngenesiae (Hardy) and horticola (Goureau).

NBN interactive distribution map(s) of known host species in Great Britain and Ireland and elsewhere: See syngenesiae (Hardy) and horticola (Goureau).

Parasitoids in Britain and elsewhere [may include records of 'atricornis', horticola and/or syngenesiae]

Aphelinus asychis Walker, 1839 Hymenoptera: Aphelinidae
Chrysocharis liriomyzae Delucchi, 1954 Hymenoptera: Eulophidae
Chrysocharis orbicularis (Nees, 1834) Hymenoptera: Eulophidae
Chrysocharis pentheus (Walker, 1839) Hymenoptera: Eulophidae
Chrysocharis pubicornis (Zetterstedt, 1838) Hymenoptera: Eulophidae
Chrysocharis viridis (Nees, 1934) Hymenoptera: Eulophidae
Cirrospilus vittatus Walker, 1838 Hymenoptera: Eulophidae
Closterocerus trifasciatus Westwood, 1833 Hymenoptera: Eulophidae
Diglyphus chabrias (Walker, 1838) Hymenoptera: Eulophidae
Diglyphus crassinervis Erdös, 1958 Hymenoptera: Eulophidae
Diglyphus isaea (Walker, 1838) Hymenoptera: Eulophidae
Diglyphus minoeus (Walker, 1838) Hymenoptera: Eulophidae
Hemiptarsenus ornatus (Nees, 1834) Hymenoptera: Eulophidae
Neochrysocharis formosa (Westwood, 1833) Hymenoptera: Eulophidae
Pediobius metallicus (Nees, 1834) Hymenoptera: Eulophidae
Pnigalio soemius (Walker, 1839) Hymenoptera: Eulophidae
Cyrtogaster vulgaris Walker, 1833 Hymenoptera: Pteromalidae
Halticoptera circulus (Walker, 1833) Hymenoptera: Pteromalidae
Miscogaster maculata Walker, 1833 Hymenoptera: Pteromalidae
Miscogaster rufipes Walker, 1833 Hymenoptera: Pteromalidae
Xestomnaster chrysochlorus (Walker, 1846) Hymenoptera: Pteromalidae


External links: Search the internet:
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British leafminers
Encyclopedia of Life
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