Amphipteryx chiapensis González-Soriano, 2010

González-Soriano, Enrique, 2010, A synopsis of the genus Amphipteryx Selys 1853 (Odonata: Amphipterygidae), Zootaxa 2531 (1), pp. 15-28 : 23-27

Amphipteryx chiapensis González-Soriano n. sp.

Figs. 5, 12 , 16, 26, 30, 37, 42

Etymology. Named chiapensis in reference to Chiapas State, Mexico.

Type material. Total: 3 ♂♂. Holotype ♂, Mexico, Chiapas State, cloud forest stream 3.5 mi east of Rayón , 17°12' 42"N, 92°58'36"W, 1680 m, 10 vii 1965, leg. Dennis R. Paulson, ( USNM) . Paratypes: same data as holotype but 16 vii 1965, 2 ♂♂ ( FSCA, DRP)

Description. Holotype dimensions: Hw 36.0; abdomen 42.5; total length 53.5. Head of male holotype as in holotype of A. nataliae but with narrow black border around labrum.

Prothorax as in A. nataliae but paired dorsal, upright, lamellate processes shorter ( Fig. 5 ), each less than a millimeter long which, in lateral view ( Fig. 12 ) are digitiform, slightly concave but apex with a small swollen convexity; distance between these lobes greater than height of each lobe, lateral margin of hind lobe continuous with digitiform lobe but strongly arcuate and appressed anteriorly and overlying part of middle lobe. Synthorax as in A. nataliae but with first lateral stripe on middle of mesepimeron extending ventrally to black on mesinfraepisternum; second (interpleural) stripe incomplete, upper portion occupying upper half of metepisternum followed ventrally by an elongate black spot ending at metastigma; third thoracic stripe abbreviated and confined to central half of posterior margin of metepimeron. Coxae and legs as in A. nataliae ; Wings (Fig. 16) hyaline; Ax Fw 8 (left):8 (right); Hw 8:7; Px Fw 35:37; Hw 31:29.

Abdomen as in A. nataliae but with a narrow lateral green line on anterior half of S3; its anterior end connecting to larger pale lateral spot; S4–7 with only a basal pale spot laterally, these becoming successively smaller on more terminal segments; dorsum of S8–10 pale blue, a thin mid-dorsal black line on S10, its postero-dorsal margin with a narrow median notch half as long as segment. Genital ligula as in A. nataliae ( Figs. 22–23 ). Cercus black, slightly longer than S10, robust, spinulose dorso-externally, in dorsal view fusiform with apex rounded and armed with a small internal anteapical scalariform tooth, medial surface anterior to tooth rugosely concave ( Figs. 26 , 37 ); in lateral view cercus robust, linear, roughly parallel from base to apex ( Fig. 30 ). Paraproct about 0.70 length of cercus, its tip in lateral view slightly directed dorsally, base in dorsal view ( Fig. 37 ) inflated main branch short, parallel its apex slightly inflated, quadrate.

Variation in paratypes. paratype males like holotype but with dark thoracic stripes more extensive as follows: conjoined abbreviated broad black antehumeral thoracic stripe extending ventrally to lower 0.10 of mesepisternum, lateral stripes on metepisternum and posterior margin of metepimeron broader and complete. Pronotal digitiform processes slightly more acuminate.

Dimensions. Males (n = 3, including holotype; means in parentheses): Hw 36.0–38.0 (37.1); abdomen 40.9–43.0 (42.1); total length 53.5–54.0 (53.7).

Distribution. Chiapas State, Mexico ( Fig. 42 ).

Diagnosis. Amphipteryx chiapensis is diagnosed in the key to males and under A. nataliae .

Figures

FIGURES 1–13. 1–9. hind lobe of prothorax, antero-lateral view; 10–12: same, lateral view; 13: same dorsal view.

FIGURES 18–23. male accessory genitalia.

FIGURES 24–27. male caudal appendages, dorso-lateral view.

FIGURES 32–40. 32–38. male caudal appendages, dorsal view; 39: tip of cercus, medio-ventral view; 40: female S9– 10, lateral view.

FIGURES 28–31. Male caudal appendages, lateral view.

FIGURES 41–42. distribution of Amphipteryx spp.