Grumichella boraceia

Calor, Adolfo R., Holzenthal, Ralph W. & Froehlich, Claudio G., 2016, Phylogeny and revision of the Neotropical genus Grumichella Müller (Trichoptera: Leptoceridae), including nine new species and a key, Zoological Journal of the Linnean Society 176 (1), pp. 137-169: 148-149

publication ID 10.1111/zoj.12310

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scientific name

Grumichella boraceia



Diagnosis: Grumichella boraceia   can be diagnosed by the following characters: male forewings with 3 brown spots; male genitalia bearing segment X not flattened, lateral view; 1st article of inferior appendage with small basomesal protuberance; 2nd article of inferior appendage subequal the apicodorsal portion of 1st article; apex of 2nd article acuminated, curved mesad; larval abdominal sternum I with 16–24 setae.This new species is most similar to G. aequiunguis   , but differs in having the 2nd article of the inferior appendage with the mesal surface excavate, and with the apex blunt.

Adult: Head and body yellowish brown.

Male: Forewing length: 9–10 mm. Forewing light golden brown, with 3 small brown spots, without dark setae on posterodorsal margin. Male genitalia as in Figure 8. Abdominal segment IX annular; in dorsal view, with anterior margin slightly convex, posterior margin broadly rounded, with medial protuberance; in lateral view, pleural region setose; tergum IX without protuberances dorsally. Preanal appendage setose, at least 4× as long as wide; in lateral view, digitate, apex rounded. Segment X saddle-shaped; in lateral view not flattened, dorsal margin slightly concave, apex upcurved, ventral margin abruptly convex, with middle length straight; segment X in dorsal view, rectangular, with posterolateral borders well developed, lateral margins subparallel after 1/3 length, with apicodorsal shelf, shelf almost rectangular, but sometimes varying to rounded, 1/2 as wide as apex of segment X, without sulcus apically. Inferior appendage slightly concave in ventral view, with basal region enlarged; rounded basally, heavily setose, bearing a small basomesal protuberance; middle region of inferior appendage with constriction before apicodorsal region; 2nd article subequal in length to apicodorsal portion of 1st article, narrow, tapering throughout length, mesal surface not excavate, apex pointed, curved mesally; apicordorsal portion of 1st article digitate, setose. Phallic apparatus simple, phallicata slightly down-curved; with pair of subequal, wide, posterodorsally directed lateral flanges, apices not acuminate; phallotremal sclerites small, U-shaped in dorsal view.

Female: Head and body yellowish. Forewing length: 7–9 mm. Forewing yellowish to brown, without dark setae on posterodorsal region. Genitalia inseparable from congeners. Abdominal segment IX lightly sclerotized, with dorsal plate, bearing pair of setose protuberances above appendages of segment X, appendages of segment X small; valves flat, thin, lightly sclerotized, with very short setae.

Larva: Length of larva 6–9 mm. Abdominal sternum I with 16–24 setae. Lateral hump sclerite small.

Larval case: Length   7–11 mm; constructed entirely of rings of dark brown silk, gently curved, tapered, wide, with 2 distinct diagonal sutures, 1 towards posterior end and 1 more or less at midlength, posterior end with ventral, dorsally directed projection, visible externally, posterior aperture C-shaped.

Pupa: Segment IX very slender; anal process long, narrow, slender, unpigmented or slightly yellowish. With dark setae. Apically upturned, hooked.

Pupal case: With   anteroventral silken pedicel, pedicel long; anterior silken membrane with an eccentric, horizontal, slit-like opening.

Etymology: The species name refers to ‘Estação Biológica de Boracéia’, Salesópolis, São Paulo, the research station of the Museu de Zoologia, Universidade de São Paulo. The word ‘boracéia’ means ‘agglomeration of people’ or, by derivation, ‘party, dance’. It is treated as a noun in apposition.

Distribution: Brazil.

Holotype, male: BRAZIL: São Paulo: Salesópolis, Rio