Grumichella muelleri, Calor, Adolfo R., Holzenthal, Ralph W. & Froehlich, Claudio G., 2016

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 : 153-155

GRUMICHELLA MUELLERI CALOR & HOLZENTHAL SP. NOV. ( FIGS 12 , 13 )

Diagnosis: Grumichella muelleri can be diagnosed by the following characters: male forewings with 3 brown spots; male genitalia bearing segment X rectangular, with posterolateral border developed, dorsal view; without sulcus on the apex of segment X; 1st article of inferior appendage without basomesal protuberance; 2nd article of inferior appendage shorter than apicodorsal portion of 1st article; apex of 2nd article acuminated, curved mesad. This new species is most similar to G. paprocki sp. nov., but differs in having segment X with the posterolateral borders not developed, and the apicodorsal shelf on segment X from 2/3 to almost as wide as the apex of segment X.

Adult: Head and body yellowish brown.

Male: Forewing length: 6–7 mm. Forewing light golden brown, with 3 small brown spots, without dark setae on posterodorsal margin. Male genitalia as in Figure 12 . Abdominal segment IX annular; in dorsal view, with anterior margin slightly concave, posterior margin slightly angulate; in lateral view, pleural region sparsely setose; tergum IX without protuberances dorsally. Preanal appendage setose, at least 4× as long as wide; in lateral view, clavate, apex acute. Segment X saddleshaped; in lateral view not flattened, dorsal margin slightly concave, ventral margin abruptly convex; segment X in dorsal view, rectangular, with posterolateral borders not developed, lateral margins sinuate, with apicodorsal shelf, shelf almost rectangular, but sometimes varying to rounded, almost 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, especially apically, not bearing a basomesal pro- tuberance; middle region of inferior appendage without constriction before apicodorsal region; 2nd article shorter than apicodorsal portion of 1st article, broad basally, tapering throughout length, mesal surface not excavate, apex pointed, curved mesally; apicordorsal portion of 1st article digitate, setose. Phallic apparatus simple, phallicata nearly straight; with pair of subequal, wide, posterodorsally directed lateral flanges, apices acuminate; phallotremal sclerites small, C-shaped.

Female: Head and body yellowish. Forewing length: 5–7 mm. Forewing yellowish to brown, without dark setae on posterodorsal region. Genitalia as in Figure 13 , inseparable among the congeners. Abdominal segment IX lightly sclerotized, with dorsal plate, bearing a pair of setose protuberances above appendages of segment X, appendages of segment X small; valves flat, thin, lightly sclerotized, with very short setae.

Etymology: The specific epithet is inhonor of the naturalist Fritz Müller, the ‘prince of observers’, according to Charles Darwin. Müller was a pioneer in studies of Neotropical caddisflies (among other taxa), including the description of the genus Grumichella . He was an important collaborator and supporter of Darwin’s theory of evolution, especially by means of Müller’s book ‘Für Darwin’ (1864) and its translations.

Distribution: Brazil.

Holotype, male: BRAZIL: Santa Catarina: Parque Ecológico Spitzkopf, confl. Rio Ouro & Rio Caeté , 25.ix.2003, UV light, Holzenthal, Paprocki & Calor, 27°00′21″S, 49°06′42″W, el. 140 m ( MZUSP).

Paratypes: Same data as holotype, except 1male ( UMSP), 1 male ( UFBA) .

Additional material: Same data as holotype, except 1 female ( UMSP) ; same data, except Rio Caeté above 1st falls, 4.iii.1998, UV light, Holzenthal, Froehlich & Paprocki, 27°00′21″S, 49°06′42″W, el. 170 m, 2 females ( UMSP) , 1 female ( UFBA) .

Figures

Figure 12. Grumichella muelleri, male. A, genitalia, lateral view. B, genitalia, dorsal view. C, phallus, lateral view. D, inferior appendage, ventral view.

Figure 13. Grumichella muelleri, female. A, genitalia, lateral view. B, genitalia, dorsal view.