Provisional key to Tribe Nepticulini (Stigmella 62S, Enteucha 1S)
References: Nepticuloidea.info, MBGBI1, Moth Dissection
The buttons below lead to: 1. Key to external features 2. Descriptions of male genitalia 3.Descriptions of female genitalia
According to MBGBI1 the main feature distinguishing Stigmella from other Nepticulidae is a U-shaped vinculum, this being 'annular' in other genera.
Enteucha has a rounded/triangular vinculum and lacks an uncus
Stigmella species are divided into groups, based on male genital structures, whilst all remaining in the one genus.
The arrangement below follows that presented at Nepticuloidea. info.
​The numbers are those of the RES checklist - as can be seen the groupings and numbering do not always match up. 
Core Stigmella
 
lapponica
​2 lapponica, 3 confusella, 13 malella
rhamnella
​14 catharticella
anomalella
​15 anomalella, 16 spinisissimae, 17 centifoliella
hybnerella
​20 paradoxa, 30, hybnerella, 31 mespilicola
oxyacanthella
21 torminalis, 22 regiella, 23 crataegella, 24 magdalenae*, 25 nylandriella, 26 oxyacanthella, 27 pyri,
​28 minisculella, 29 desperatella
floslactella
​32 floslactella, 33 carpinella, 34 tityrella
salicis
​35 salicis, 36 myrtilella, 37 zelleriella, 38 obliquella, 39 trimaculella, 40 assimilella
sorbi
​41 sorbi, 42 plagicolella
lemniscella
​43 lemniscella, 44 continuella
aurella
​45 aurella, 46 auromarginella, 47 splendidissimella, 48 pretiosa, 49 aeneofasciella, 50 dryadella, 51 poterii,
​52 filipendulae
incognitella
​53 incognitella 54 perpygmaeella
ruficapitella
55 hemargyrella, 57 suberivora, 58 basiguttella, 59 svenssoni, 60 ruficapitella, 61 atricapitella, 62 samiatella,
​63 roborella
speciosa
​56 speciosa
Non-core Stigmella
 
tiliae
​4 tiliae
betulicola
​5 betulicola, 6 sakhalinella, 7 luteellla, 8 glutinosae, 9 alnetella, 10 microtheriella
prunifoliella
​11 prunetorum
ultima
​12 aceris
ulmivora
​18 ulmivora, 19 viscerella
* Possible that S.magdalenae is now treated as conspecific with S.nylandriella