Amazonatolica hamadae, Holzenthal, Ralph W. & Pes, Ana Maria Oliveira, 2004

Holzenthal, Ralph W. & Pes, Ana Maria Oliveira, 2004, A new genus of long­horned caddisfly from the Amazon basin (Trichoptera: Leptoceridae: Grumichellini), Zootaxa 621, pp. 1-16 : 6-10

Amazonatolica hamadae , new species

Figs. 4–5

This new species can be distinguished from other members of the Grumichellini by several features as discussed below (Phylogenetic Considerations). It can be easily separated from other Latin American members of the tribe by its 0,0,0 tibial spur formula, 3­segmented maxillary palp, absence of fork III in the hind wing of both sexes, and by the male genitalia with its combination of simple tergum X, prominent harpago, and the broad, triangular, scletotized mesal shelf of the inferior appendage.

Adult: Forewing length 7 mm (n=3) male; 6 mm (n=5) female. Color (in alcohol) pale stramineous (denuded, although in a mature female pharate pupa, the wings appear to be a darker brown, with a large patch of white setae apically).

Male ( Fig. 4 ): Abdominal segment IX annular, narrow; anterior and posterior margins sinuate; in dorsal view quadrate; sparse setae present posterolaterally. Segment X saddleshaped, simple, lightly sclerotized, lacking setae or secondary processes, covering the phallic apparatus dorsally; in lateral view, narrow basally, directed ventrad, broader mesally, truncate apically; in dorsal view, triangular, apex slightly and narrowly cleft. Preanal appendage long, digitate, setose, shorter than segment X. Inferior appendage long, bipartite, consisting of primary segment and second article (harpago); primary segment with basal and apical regions; basal region broad, sclerotized, with rounded basoventral corner, bearing very long setae; with broad, triangular, sclerotized mesal shelf, its apex rugose; apical region digitate, more lightly sclerotized, bearing very long setae dorsally and laterally, and short, stout, spinelike setae on mesal surface; second article of inferior appendage (harpago) long, spatulate, apex rounded, with pair of short apicomesal setae. Phallic apparatus simple, phallobase tubular, wide basally with wide opening, tapering apically; phallicata absent; parameres absent; endophallic membranes present apicoventrally; phallotremal sclerites present, large, V­shaped.

Female ( Fig. 5 ): Tergum IX lightly sclerotized, with patch of dorsal setae and more sparsely distributed, longer dorsolateral setae; sternum IX lightly sclerotized, rounded, bulbous, covered with fine microtrichia. Appendages of segment X short, broad, thumbshaped, heavily setose, situated dorsolaterally. Valve prominent, flaplike, apex irregular, heavily setose. Tergum X produced into thin, ventrally directed, apically excavate, sclerotized plate below appendages of segment X and between valves. Vaginal apparatus, in ventral view, oval, broadest mesally, narrowing anteriorly, with central, key­hole shaped sclerites; in lateral view, saddle­shaped.

Holotype male: BRAZIL: Amazonas: Manaus, Reserva Florestal Adolpho Ducke, 02°57’S, 59°57’W, Igarapé Barro Branco (sede), vi.2001, J. Vidal ( INPA).

Paratypes: BRAZIL: Amazonas: Manaus, highway ZF3, Fazenda Dimona, igarapé [small stream] at km 6, 02°19’67”S, 60°04’66’’W, 07–11.iv.2002, J.L. Nessimian — 6 males, 20 females ( INPA); Fazenda Dimona,( PDBFF), km 172, BR 174, igarapé do acampamento, 02°19’40”S, 60°04’39”W, 07.iv.2002, J.L. Nessimian — 1 male, 1 female ( UMSP); same, except 02°20’19.5”S, 60°06’09.5”W, 12.iv.2002 — 1 male, 6 females ( NMNH); Reserva Florestal Adolpho Ducke, Igarapé do Bolívia, acampamento, 02°57’S, 59°57’W, 19.iv.2002, A.M.O. Pes — 1 male, 8 females ( INPA); Igarapé do Acará, 22.vii.2002, J. Vidal, J.M.F. Ribeiro — 2 males, 2 females ( MZUSP); Igarapé Barro Branco (sede), vi.2001, J. Vidal — 20 females ( INPA); Presidente Figueiredo, Igarapé da Onça, Balneário Sossego da Pantera, 02°05’57”S, 60°01’02”W, 04.v.2000. A.M.O. Pes, J. O. da Silva — 1 female ( INPA); same, except 06.iv.2000, A.M.O. Pes, J. O. da Silva — 2 males, 3 females ( INPA); Presidente Figueiredo, Igarapé da Pantera, km 20, AM 240, 02°02’S, 59°50’W, 14.xii.2001, A.M.O. Pes, J.O. da Silva, J. Bosco — 2 females ( INPA); same, except 03­04.v.2000 — 2 females ( UMSP); Presidente Figueiredo, Igarapé do Sr. José, ramal/km 24, AM [highway] 240, 02°01’06”S 59°49’27”W, 24–27.ii.2000, A.M.O. Pes, U.C. Barbosa — 1 male, 5 females ( INPA); same, except 05.iv.2000. A.M.O. Pes, J.O. da Silva — 1 male, 3 females ( INPA); same, except 04–05.iv.2000. A.M.O. Pes, J.O. da Silva — 5 females ( INPA); same, except 03–04.vii. 2000. A.M.O. Pes, J.O. da Silva — 2 females ( INPA): same, except 03–04.vii. 2000. A.M.O. Pes, J.O. da Silva, J. Bosca — 1 male, 4 females ( UMSP); same, except 31.v. 2000. A.M.O. Pes, J.O. da Silva — 4 males, 9 females ( INPA); same, except 02–03.viii. 2000. A.M.O. Pes, J.O. da Silva — 1 female ( INPA).

Additional Material Examined: BRAZIL: Amazonas: Igarapé do Tinga, 18.iii.2004, A.M.O. Pes — 3 larvae, 4 pre­pupae ( INPA); Presidente Figueiredo, Igarapé da Onça, Balneário Sossego da Pantera, 02°05’57”S, 60°01’02”W, 14.xii.2001, A.M.O. Pes, on aquatic plants — 25 larvae ( INPA); same, except 14.iii.2002, A.M.O.Pes, on aquatic plants — 25 larvae (12 examined for gut contents), 6 pupae ( INPA); Presidente Figueiredo, Igarapé da Pantera, km 20, AM 240, 02°02’S, 59°50’W, 14.xii.2001, A.M.O. Pes — 3 larvae, 2 pupae ( UMSP); Manaus, Reserva Florestal Adolpho Ducke, Igarapé do Bolívia, acampamento, 02°53’S, 59°58’W, 20.iv.2002, A.M.O. Pes — 3 pupae ( UMSP); Igarapé Barro Branco, 02°53’S, 59°58’W, 30.1.2002, A.M.O. Pes — 6 larvae ( NMNH). Bahia: Barreiras (divisa com Tocantins), Rio Boró, 12°17’56.5”S, 45°50’55.5”W, 18.viii.2002, N. Hamada — 4 larvae ( INPA). Rondônia: Vilhena, igarapé pequeno na ponte da estrada velha entre Nova Conquista e Colorado do Oeste [small stream at bridge on old road between Nova Conquista and Colorado do Oeste], 12°54’35.4”S, 60°14’48.5”W, 11.vii.2002, N. Hamada — 13 larvae ( INPA).

Distribution. BRAZIL: Amazonas, Bahia, Rondônia.

Etymology. We take great pleasure in naming this species in honor of Dr. Neusa Hamada, INPA, in recognition of her contributions to this study and to our knowledge of the Trichoptera fauna of the Amazon basin.

Figures

FIGURE 4. Amazonatolica hamadae, new species. Male genitalia: A—lateral; B—inferior appendage, ventral; C—segments IX & X, dorsal; D—phallus, lateral; E—apex of phallus, enlarged, lateral; F—apex of phallus, enlarged, ventral.

FIGURE 5. Amazonatolica hamadae, new species. Female genitalia: A—lateral; B—dorsal; C—vaginal apparatus, ventral.