Notalina (Neonotalina) ralphi sp. nov.

Figs 1, 2

Diagnosis.

This new species can be easily recognized by the absence of processes on the median portion of tergum X, inferior appendages with ventromesal process indistinct laterally and distinct ventrally with subtruncated apex, and Y-shaped phallotremal sclerite in lateral view. Notalina ralphi sp. nov. is morphologically similar to N. franciscana based on the subtruncate mesoventral process of the inferior appendages in ventral view. However, N. ralphi sp. nov. has the acuminate preanal appendages, which in N. franciscana are clavate. In addition, in the new species the ventrolateral margin of the segment X has stout, short setae, whereas N. franciscana has these setae only in the apex of the tergum.

Description.

Male. Head brown (in alcohol) (Fig. 1B); maxillary and labial palps brown; antennae pale brown (Fig. 1A). Thorax brown; pleuron pale brown (Fig. 1C). Forewing brown, with small hyaline spot at thyridial cell; forewing length 7.8 mm (n = 4), forks I and V present (Fig. 1D); hind wing length 6 mm (n = 4), forks I, III, and V present, fork I very narrow and fork III with very short petiole (Fig. 1E). Legs pale brown; tibial spur formula 2, 2, 4 (Fig. 1A). Segment IX, in lateral view, broadest ventrolaterally, anterior margin slightly sinuous (Fig. 2A); apicodorsal area with paired, poorly developed, distantly situated protuberance; posterolateral margin bearing setae. Preanal appendages setose, long, and slender, ~ 2/3 length of segment X (Fig. 2A, B); in dorsal view, apex acuminated towards inner margin, bearing long setae (Fig. 2B). Segment X, in lateral view, saddle-shaped; anterodorsal area slightly convex; mid-dorsal area without lateral protuberance; distal area without dorsomesal and dorsolateral processes; apicolateral processes rounded, bearing short stout setae (Fig. 2A); in dorsal view, V-shaped apicomesal incision extending anteriorly ~ 1/3 length of segment X; with a row of 5-7 short stout setae subapically. Inferior appendage, in lateral view, with broad basal portion, apical portion elongate, digitate, setose; basodorsal process rounded, smaller than basoventral process; dorsomesal process long and broad, apex acute, directed apicodorsad (Fig. 2A); in ventral view, basoventral process well developed, slightly asymmetrical, rounded, apex directed mesad (Fig. 2C); ventromesal process, in lateral view, indistinct (Fig. 2A); in ventral view, distinct with subtruncated apex (Fig. 2C). Phallic apparatus with a pair of strongly sclerotized, acuminate phallobase flanges, apex directed dorsad (Fig. 2D); phallotremal sclerite well developed, roughly Y-shaped in lateral view (Fig. 2D), with an anteriorly directed projection when viewed ventrally (Fig. 2E).

Type material.

Holotype Brazil • ♂; Federal District, Planaltina, Estação Ecológica de Águas Emendadas, Córrego Tabatinga; 15.545361°S, 47.566222°W, 1047 m, 04-24 Apr. 2018, G.R. Desidério, C.A. Campos, F. Camelo legs.; Malaise trap; INPA.

Paratypes Brazil• 3 ♂♂; same data as for holotype (UMSP) • 4 ♂♂; Federal District, Planaltina, Estação Ecológica de Águas Emendadas, Córrego Tabatinga; 15.545361°S, 47.566222°W; 1047 m a.s.l.; 07-24 Apr. 2018; G.R. Desidério, C.A. Campos, F. Camelo legs; INPA; • 4 ♂♂; same collection data as for preceding; 24 Apr. - 07 May. 2018; UFBA; • 1 ♂; same collection data as for preceding; MZUSP; • 10 ♂♂; Tocantins, Palmas, Parque Estadual do Lajeado, Igarapé da Onça; 10.112361°S, 48.258639°W; 596 m a.s.l.; 06-11 May. 2017; N. Hamada, G. Amora legs; INPA; • 20 ♂♂; same collection data as for preceding; 19 Dec. 2017; INPA; • 16 ♂♂; same collection data as for preceding; UFBA; • 5 ♂♂; same collection data as for preceding; DZRJ; • 5 ♂♂; MZUSP; • 7 ♂♂; same collection data as for preceding; 18 Jan. 2018; DZUP.

Etymology.

The new species is named in honor of Dr. Ralph W. Holzenthal (University of Minnesota, USA) in recognition of his efforts to the advancement of the knowledge on Neotropical caddisflies and his contributions in supervising new entomologists.

Distribution.

Brazil: Cerrado biome (Federal District and Tocantins states) (Fig. 3).

New distribution record