Pyrus pear
Incl. x Sorbopyrus
(For a dichotomous table for galls on Pyrus by Hans Roskam click here)
Dichotomous table for leafminers
1a mine in fallen leaves: Neocoenorrhinus pauxillus
1b mine with an excision: Incurvaria pectinea
1c tentiform mine => 2
1d blotch, without a preceding corridor => 7
1e corridor from start to end (possibly ending an a secondary blotch) => 12
1f gallery, ending in a primary blotch => 18
1g fleck mine => 19
1h gallen etc => Tables for all parasites per species
Dichotomous table for leafminers
1a mine in fallen leaves: Neocoenorrhinus pauxillus
1b mine with an excision: Incurvaria pectinea
1c tentiform mine => 2
1d blotch, without a preceding corridor => 7
1e corridor from start to end (possibly ending an a secondary blotch) => 12
1f gallery, ending in a primary blotch => 18
1g fleck mine => 19
1h gallen etc => Tables for all parasites per species
2a mine upper-surface => 3
2b mine lower-surface => 5
3a mine grey or silvery; positioned over a vein => 4
3b mine silvery, later orange-brown, between two veins: Callisto denticulella
4a fully developed mine silvery white, without black speckles: Phyllonorycter leucographella
4b fully developed mine dirty grey because of many black speckles on the upper epidermis: Phyllonorycter corylifoliella
5a mine epidermal, silvery, later orange-brown: Callisto denticulella
5b mine not epidermal; epidermis pale green => 6
6a pupa grey-brown to grey; grass in a lump in a corner of the mine; common species: Phyllonorycter oxyacanthae
6b pupa reddish-brown to chestnut; frass in a line in the mine; rare species: Phyllonorycter mespilella
7a oviposition spot (usually the leaf tip) covered by a black, shining, drop of hardened secretion: Trachys minutus
7b no such black drop => 8
8a blotch full depth => 9
8b blotch upper-surface => 10
9a mine in spring: Yponomeuta malinellus
9b mine in autumn: Scythropia crataegella
10a mine ca. 5 mm, brown, often in number; frass in a thick plug: Rhamphus oxyacanthae
10b mine larger, not brown; frass different => 11
11a mine red-brown with a dark centre; frass in concentric circles: Leucoptera malifoliella
11b mine silvery, beginning as a narrow line over a vein, widening subsequently: young mines of Phyllonorycter corylifoliella or Ph. leucographella
12a at the start of the corridor a globular, shining black egg shell; larva green => 13
12b no egg shell visible where the corridor starts; larva whitish => 16
13a in the second half of the corridor the frass line occupies at least half its width; frass coiled; common species => 14
13b in the second half of the corridor the frass line at most 1/3 of the corridor width; frass dispersed or indistinctly coiled; rare species => 15
14a mine very compact, on a small surface (sometimes a secondary blotch); especially the first part of the corridor contorted with a broad, sometimes very broad, frass line; frass black; egg upper- or lower-surface: Stigmella pyri
14b mine not compact, running through a sizable section of the leaf; especially the first section of the corridor much less contorted, with a narrow frass line; frass brown; egg lower-surface: Stigmella oxyacanthella
15a frass line very narrow; often a secondary blotch: Stigmella desperatella
15b frass line broader; frass dispersed or narrowly coiled: Stigmella minusculella & St. stettinensis
16a corridor > 3 cm; frass in a narrow central line; larva chamber more than 3 times as wide as long: Lyonetia clerkella
16b corridor shorter, may be devoid of frass; larva chamber indistinct => 17
17a corridor narrow, branched, without frass: Recurvaria nanella
17b corridor relatively broad, hook-like, in a vein axil, containing much frass: Bucculatrix bechsteinella
18a initial gallery quite narrow and strongly contorted; larva greenish white: Ectoedemia atricollis
18b gallery starts rather wide, not strongly contorted; larva yellow: Stigmella irregularis
20a case > 7 mm: Coleophora hemerobiella
20b case < 7 mm: Coleophora spinella
Not included in the key: Coleophora currucipennella, kroneella; Lyonetia prunifoliella; Parornix anguliferella; Phyllonorycter anceps, blancardella, cydoniella, hostis, pyrifoliella, sorbi; Stigmella pyrivora.