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(Coleoptera, Diptera, Hymenoptera and Lepidoptera)
by
Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds
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MENTZELIA.
White-stemmed Stickleaf and Golden Bartonia. [Loasaceae]
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Two
species of Mentzelia are recorded in Britain. Both are introduced
and include White-stemmed Stickleaf (M. albicaulis) and Golden
Bartonia (M. lindleyi).
Two British miners are recorded on Mentzelia. |
Key for the identification of the known mines of British
insects (Diptera and non-Diptera) recorded on Mentzelia
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1a > Leaf-miner: Mine
generally follows the leaf margin, widening from the initial linear
section into an irregular broad blotch; it is dark green when fresh
but quickly turns blackish (Spencer, 1972b: 34 (fig. 90); Spencer,
1976: 138-9, fig. 246).
Full
depth corridor that mostly starts near the leaf margin, and never
begins with a series in close, intestine-like curves. Further on
the corridor strongly widens, and usually remains close to the leaf
margin. Often several larvae in a mine. Frass in lumps or short
rods, never in long threads.
Puparium reddish brown |
On Urtica, but not yet on Mentzelia, in Britain and Humulus and possibly Parietaria eslewhere. Widespread and common in Britain. Also recorded in the Republic of Ireland. Widespread in continental Europe.
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Agromyza
reptans Fallén, 1823 [Diptera: Agromyzidae]. |
1b > Leaf-miner: A distinctive mine primarily above mid-rib, with irregular short
lateral offshoots into leaf blade. Pupation external (Spencer, 1972:
51 (fig. 172), 55; Spencer, 1976:
270, 271 (fig. 486)).
Branched,
whitish, upper-surface corridor; main axis overlying the midrib;
side branches overlying the main lateral veins. (In Campanula and Phyteuma the mine is much less branched, sometimes nothing
more than a corridor on top of the midrib). Frass in rather long
strings. Usually the mines begins as a long and narrow, shallow,
tortuous lower-surface corridor that ends upon the midrib but otherwise
is not associated with the leaf venation. Often this initial corridor
is filled with callus, and then even less conspicuous. Pupation
outside the mine.
A
linear mine on the upper surface, usually following the midrib and
showing side branches along the veins. The frass is in strings. |
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Polyphagous. On more than 40 host genera in 15 families, but not yet on Mentzelia, in Britain. Widespread
throughout Britain. Also recorded in the Republic of Ireland. Widespread in continental Europe.
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Liriomyza
strigata (Meigen, 1830) [Diptera: Agromyzidae]. |
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