Nye & Fletcher (1991) stated:-
The type-species was included by Treitschke and cited by Duponchel as * Ustulella, an incorrect subsequent spelling. Unavailable designation of type-Species Alucita costella Fabricius, 1775, was designated by Boisduval, 1836, Hist. nat. Insectes (Spec. gén. Lépid.) 1: 137. In the Introduction to the volume, pages 1-154, Boisduval reviewed earlier classification of lepidoptera and designated as many as three different type-species for each generic name. In his "Exposé de notre Méthode", pages 155-690, no type-species designation was made for any of the genera he himself used. Under the Code (Edn 3), Article 69(a)(iv), the type-species designation of an author is eligible for consideration if he states that it is the type".. and if it is clear that the author accepts it as the type-species". Boisdival's type designation, although clearly stated, do not fufill the last requirement and so are unavailable. Even though Boisduval's 1836 work was well known to lepidopterists, the type-designation contained in a have not been accepted by Hemming or by other authors. The citation by Duponchel is acceptable as a type-species designation as it is contained in the continuation of a layout in which Duponchel stated in the same work, 7 (2): 102, that the species so cited were the types of genera.
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