Mycelis, wall lettuce

Mycelis is currently included in Lactuca.

1a mine full depth => 2

1b mine under or upper-surface; larva a maggot => 3

1c gallen etc => 100

2a long narrow corridor; larva a maggot: Trypeta immaculata

2b broad irregular corridor or elongated blotch; larva with chitinised head: Orthochaetes setiger

3a blotch, not associated with the midrib; often preceded by a corridor => 4

3b corridor, may be associated with the midrib => 6

4a blotch elongated, often lobed, overlying the midrib: Trypeta immaculata

4b blotch more rounded in outline, not associated with the midrib => 5

5a larva: rear spiraculum with 3 papillae: Liriomyza puella

5b larva: rear spiraculum with 8 papillae: Liriomyza sonchi

6a mine on or (partly) within the midrib => 7

6b mine independent from the midrib => 11

7a secondary feeding lines conspicuous; broad corridor with lobed extensions: Trypeta immaculata

7b no secondary feeding lines; mine more or less pinnately branched => 8

8a mine contains stringy frass; pupation outside the mine; larva: cephalic skeleton of the Phytomyzinae-type: Liriomyza strigata

8b visible corridors almost free of frass; puparium in the base of the hollow midrib (there the frass is cumulated); larva: cephalic skeleton of the Agromyzinae-type => 9

9a larve: rear spiraculum with 8-9 papillae: Ophiomyia cunctata

9b larve: rear spiraculum with > 10 papillae => 10

10a larva: front spiraculum spine-like, erect: Ophiomyia pulicaria

10b larva: front spiraculum broad, curved: Ophiomyia beckeri

11a puparium in the mine in a, usually lower-surface, pupal chamber; corridor not exceptionally long: Chromatomyia cf. syngenesiae

11b pupation after the larva has left the mine, through a semicircular exit slit; mine begins with an exceptionally long lower-surface corridor: Phytomyza marginella

100a Nematoda => 101

100b Acari => 102

100c Coleoptera => 103

100e Diptera => 104

100f Hemiptera => 105

100d Hymenoptera => 106

100g rust fungi => 107

100h smut fungi => 108

100i powdery and downy mildews => 109

100j other causers => 110

104 – Diptera

104a Cecidomyiidae: Mycodiplosis erysiphes

105 – Hemiptera

105a Triozidae: Trioza foersteri

107 – rust fungi

107a Coleosporiaceae: Coleosporium tussilaginis

107b Pucciniaceae: Puccinia chondrillae, opizii

109 – powdery and downy mildews

109a Erysiphaceae: Golovinomyces cichoracearum

109b Peronosporaceae: Bremia lactucae

110 – other causers

110a Fungi, Synchytriaceae: Synchytrium aureum

110b Lepidoptera, Tortricidae: Phalonidia gilvicomana

Not included in the key: Agonopterix propinquella.

19/12/2016