Styringomyia amazonica, Ribeiro, Guilherme Cunha, 2003

Ribeiro, Guilherme Cunha, 2003, Systematics of the Neotropical species of Styringomyia Loew (Diptera: Tipulomorpha: Limoniidae), Zootaxa 253, pp. 1-35 : 24-25

Styringomyia amazonica sp. n.

MATERIAL EXAMINED. Holotype. Male, Brazil, Amazonas, Tefé, Alvaraes (ca. 3º24S 64º45W) 50m, 24.II.1981, C. Young. ( CMNH). Pinned specimen, with dissected terminalia inside microvial with glycerin pinned with the specimen. Paratypes. 2 males plus 10 mating pairs, same data of holotype ( CMNH). Additional material. 19 males and 18 females, same data of holotype and paratypes ( CMNH); 1 male, Ecuador, Coca (Francisco de Orellana, 0º28S, 77º00W), Napo, May 6, 1965, Luiz Peña ( USNM); 1 male, Ecuador, Coca, V­ 10­1965, Luiz Peña ( USNM).

ETYMOLOGY. The name of this species refers to its habitat at the Brazilian and Ecuadorian Amazonian Forest.

DESCRIPTION. Dimensions. See Table I. Morphology. Ninth sternite ( Fig. 36 ): abruptly narrowed at apex. Tenth tergite ( Fig. 24 ): posterior margin trilobulate, medial lobe triangular, longer than broad. Gonocoxite ( Figs. 35­36 ): distal half abruptly narrowed, rounded at apex; more stout and longest hairs along apical margin; thin and shorter hairs along the most proximal part of medial margin. Gonostylus ( Figs. 16 , 35­36 ): a unique strongly sclerotized extension at apex of posterior margin ( Fig. 16 , III + IV); anterior margin near straight; posterior margin slightly sinuous, rounded at its proximal portion; hairs of lateral face concentrated on a small protuberance near apex. Aedeagal sheath ( Fig.36 ): without lateral lobes; dorsal crest four­pointed, medial points separated by a wide space; ventral branches long, broad at base, narrowing gradually toward tip. Female cercus: narrowing gradually toward tip; ventral margin gently curved, not constricted.

REMARKS. The examined specimens of this new species deposited at USNM were identified by Charles Paul Alexander as belonging to S. dorsolineata .

Figures

FIGURE 35. Styringomyia amazonica sp. n., male specimen from Ecuador (Francisco de Orellana). Aspect of part of terminalia. Specimen on slide. Abbreviations: goncx, gonocoxite; gonst, gonostylus.

FIGURE 36. Styringomyia amazonica sp. n., holotype. Three­dimensional structure of terminalia. Abbreviations: aed, aedeagus; goncx, gonocoxite; gonst, gonostylus; S 9, ninth sternite.

FIGURES 18 ­ 25. Tenth tergite (male) of Neotropical Styringomyia species. 18. S. mystica, specimen from Peru (Madre de Dios). 19. S. youngi sp. n., holotype. 20. S. atlantica sp. n., paratype. 21. S. paulista, holotype (modified from Alexander, 1946). 22 S. simplex, specimen from Brazil (Mato Grosso, Diamantino). 23. S. maya sp. n., paratype. 24. S. amazonica sp. n., holotype. 25. S. manauara sp. n., paratype. Abbreviations: T 9, ninth tergite; T 10, tenth tergite.

FIGURES 14 ­ 17. Gonostylus of Neotropical Styringomyia species. Lateral and medial faces, respectively, on left and right sides of each figure. 14. S. simplex, holotype. 15. S. maya sp. n., specimen from Ecuador (Manabi, Palmar). 16. S. amazonica sp. n., specimen from Ecuador (Francisco de Orellana). 17. S. manauara sp. n., paratype. The numbers refers to the homology system applied to the extensions of the gonostylus.