Styringomyia maya, Ribeiro, Guilherme Cunha, 2003

Ribeiro, Guilherme Cunha, 2003, Systematics of the Neotropical species of Styringomyia Loew (Diptera: Tipulomorpha: Limoniidae), Zootaxa 253, pp. 1-35 : 22-23

Styringomyia maya sp. n.

Alexander, 1945b: 241, Figure 8 (male terminalia, identified as S. americana Alexander, 1914 ).

MATERIAL EXAMINED. Holotype. Male, Ecuador: Azuay, 18 km SE Jesus Maria (2º33S, 79º33W), 1200m, 10 Nov. 1987, J. Rawlins, C. Young, R. Davidson, wet forest habitat ( CMNH). Pinned specimen, with dissected terminalia inside microvial with glycerin pinned with the specimen. Paratypes. 2 males and 2 females, same data of holotype ( CMNH). Additional material. 1 male, Ecuador, Manabi, Palmar (2º00S, 80º21W), 200 m, May 20, 1941, David Laddey ( USNM). 1 male, Honduras, Tela, Lancetilla (15º41N, 87º26W), IX­17­1953 ( USNM); 1 male, Costa Rica, Rivas, Talamanca (9º25N, 83º37W), January, 1939 (name of collector not legible, USNM); 1 male, British Honduras ( Belize), Orange Walk (18º06N, 88º31W), October 18, 1925, (name of collector not legible, USNM); 1 male, Sevilla, Colombia, S. A., (4º16N, 75º58W) V­7­1926, F. W. Walker ( USNM); 1 male, Panama, Pina (8º 4.2N, 78º11W), January 14, 1954, Field ( USNM).

ETYMOLOGY. This species is named after the Maya civilization, which in Pre­ Colombian times occupied areas that include the most northern parts of the range of its distribution.

DESCRIPTION. Dimensions. See Table I. Morphology. Ninth sternite ( Fig. 34 ): abruptly narrowed at apex. Tenth tergite ( Fig. 23 ): posterior margin trilobulate; medial lobe subtriangular, broader than long. Gonocoxite ( Figs. 33­34 ): distal half bifurcated; dorsal branch bearing a tuft of stout hairs, the three longest at its posterior margin; ventral branch with one long and stout hair at apex; other hairs long and slender. Gonostylus ( Figs. 15 , 33­34 ): with two strongly sclerotized apical extensions ( Fig. 15 , III and IV), the apicalmost (extension IV) slightly longer and broader than the other; posterior margin constricted at base, dilated at apex; thin hairs spread along most distal parts of lateral face. Aedeagal sheath ( Figs. 33­34 ): without lateral lobes; dorsal crest two­pointed, with points disposed side by side; ventral branches long, broad at base, abruptly narrowed at tip. Female cercus: narrowing gradually toward tip; ventral margin gently curved, not constricted.

REMARKS. Charles Paul Alexander insisted in associating specimens of this species with S. americana (e. g. Alexander, 1945b: 241 ( Figure 8 ), 264; Alexander, 1947: 356 (List of Species)), without, however, clarifying the grounds on which these associations were based. The examined specimens of this new species deposited at USNM were all identified by Alexander as belonging to S. americana .

Figures

FIGURE 33. Styringomyia maya sp. n., male specimen from Ecuador (Manabi, Palmar). Aspect of part of terminalia. Specimen on slide. Abbreviations: aed, aedeagus, goncx, gonocoxite; gonst, gonostylus.

FIGURE 34. Styringomyia maya sp. n., holotype. Three­dimensional structure of terminalia, dorsolateral view. Abbreviations: aed, aedeagus; goncx, gonocoxite; gonst, gonostylus; S 9, ninth sternite, vb, ventral branches of aedeagal sheath.

FIGURES 8 ­ 9. Female terminalia of Neotropical Styringomyia species. Lateral view. 8. Allotype of Styringomyia paulista. 9. Paratype of Styringomyia simplex. Specimens on slides. Abbreviations: cerc, cercus; hyp vlv, hypogynial valve; tg 10, tenth tergite.

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.