Phyllogomphoides enriquei, Novelo-Gutiérrez, 2017

Novelo-Gutiérrez, Rodolfo, 2017, Phyllogomphoides enriquei (Odonata: Gomphidae) a new species from Mexico, Zootaxa 4312 (3), pp. 595-600 : 596-599

Phyllogomphoides enriquei sp. nov.

Figs. 1 ¯5, 7

Holotype, ♂: MEXICO: Michoacán; Municipality of Tepalcatepec , Río Pinolapa, 19°00.524 N; 103°01.456 W, elevation 616m, 0 4 July 2005, R. Novelo & J.A. Gómez leg. Holotype deposited in Colección Entomológica del Instituto de Ecología, A.C., Xalapa ( IEXA).

Etymology. We name this species enriquei (a noun in the genitive case) in honor to our friend and fellow odonatologist Enrique González Soriano, for his great contributions to the knowledge of the Odonata of Mexico.

Description of male holotype. Body mostly dark brown, with five pale stripes on pterothorax, and pale, creamy yellow spots on abdomen.

Head ( Fig. 1 ): Face mostly pale covered with numerous long, dark, stiff setae; labrum mostly pale with a wide blackish-brown band on anterior border, posterior border brown, with a small, brown U-shaped median spot; mandibles pale basally, tips reddish-brown; anteclypeus and postclypeus brown inferiorly, creamy pale superiorly; lower surface of frons brown, upper and dorsal surfaces mostly pale, a blackish-brown stripe in the union with vertex; antennal scape dark brown with apical rim creamy pale, pedicel dark brown, flagellum brown; vertex dark brown, depressed area between ocelli with a large, quadrate pale spot, ocelli yellow; occiput dark brown with a large, trapezoid, central pale spot, its posterior border fringed with long, stiff, reddish-brown setae; labium mostly pale, submentum light brown.

Thorax ( Fig. 1 ): Pronotum reddish-brown, with a pale middorsal twin-spot on posterior margin of mid- and posterior lobes. Pterothorax reddish-brown, with five complete pale stripes as shown in Fig. 1 ; middorsal thoracic carina pale; antealar crest dark; first antehumeral stripe connected to pale mesothoracic collar forming an inverted "7" reaching border of antealar crest superiorly; second antehumeral stripe the narrowest, divided in a stripe that covers inferior 0.70 of mesepisternum’s length, and a superior circular spot close to antealar crest; mesepimeral stripe two times wider than second antehumeral stripe, covering most of mesepimeron (90%), more or less parallelsided, gradually widening at upper 0.20; metepisternal stripe covering the full-length of metepisternum, almost encircling the spiracle, and forming a circular spot superiorly; metepimeral stripe forming and inverted “L” reaching subalar carina; metaposternum pale; pectus mostly grayish-yellow, with a large, distal, quadrate brown spot. Legs: coxae and trocanters ventrally pale, dorsally light brown; femora mostly light brown, distally dark reddish-brown, anterior femora broadly pale ventrally; tibiae, tarsi and pretarsal claws reddish-black; armature black, protibiae with modified spines (scale-like) on distal half of external border, long and slender spines on internal borders. Wings: hyaline, tinged with brown at extreme base, venation black, anterior margin of costae with a continuous well-defined yellow line in all the wings; basal subcostal crossveins present; second primary antenodal crossvein the 7th (left), the 8th (right) in FW, the 6th in HW; antenodal crossveins FW 19, HW 14; postnodal crossveins FW 13, HW 13; triangles 3-celled; subtriangles 3-celled in FW, 2-celled in right HW, 3-celled in left HW; supratriangles 3-celled; anal loop 3-celled (left), 4-celled (right); anal triangle 4-celled; pterostigma dark brown with brace vein, surmounting six cells (left), five cells (right) in FW, six cells in HW.

Abdomen: Dark color on S1-2 reddish-brown, black on S3¯7, S8¯9 black on dorsum, light brown at sides, S10 light brown. Pale coloration creamy yellow as follows: a middorsal stripe and the ventral 0.5 of tergum on S1; a middorsal stripe, auricles, and a posteroventral, narrow, vertical spot on S2; a middorsal stripe on basal 0.80 constricted at basal 0.85 of its length, and a broad basoventral spot on basal 0.40 of S3; a middorsal stripe on basal 0.80 tapering posteriorly, a slightly broad basoventral spot on basal 0.25 of S4; a middorsal stripe on basal 0.25 tapering posteriorly, a slightly broad basoventral spot on basal 0.25 of S5; a middorsal spot on basal 0.10, a slightly broad basoventral spot on basal 0.20 of S6; basal half of S7; S8 with pale strikes on basoventral 0.10. Inferior margins of S8-9 foliate and scalloped ( Fig. 2 ), foliation on S8 increasing gradually in width caudally, ending in a wide rounded lobe which surpasses slightly the anterior margin of S9 (0.50 mm), the edge of this foliation with a row of small spines on apical 0.30 of its length, maximum width of foliation 0.55 mm; foliation on S9 of the same width along the entire margin, 0.45 mm wide, inferior margin smooth. Accesory genitalia ( Fig. 3 ): anterior lamina thick, entire, anterior margin concave and undulate; in ventral view anterior hamuli bilobed, anterior lobe tumid anteriorly, ending in a strong spine posteriorly, followed by a wide, deep cleft between anterior and posterior lobes ( Fig. 3 ); posterior lobe wide, distal end widely rounded, with a small notch between two small denticles on apical third of mesial margin, external surface moderately excavated inferiorly; posterior hamule subcylindrical, with a large, sharply pointed apical spine directed mesally, with abundant long and short whitish hairs. Vesica spermalis: V1 bifid with a small tooth on middle ( Fig. 3 ), V2 ¯3 of usual type, V4 with 2 relatively short flagella not reaching posterior margin of V1. Anal appendages: Cercus in dorsal view semicircular-forcipate ( Fig. 4 ), with abundant long setae, dorsally pale on apical 0.80 its length, basal 0.20, ventral surface, and apices mostly black, a dorsal tooth (0.46 mm long) at basal 0.70 directed medially, tips flattened laterally and produced dorsally and ventrally; in ventrolateral view with a short (0.13 mm long), sub-basal spine at basal 0.20; in lateral view ( Fig. 5 ) tip of cercus produced dorsally in a large, wide spine, ventrally produced into an acuminate spine, 0.25 mm long. Epiproct brown, V-shaped, in lateral view strongly up-curved ( Fig. 5 ), in dorsal view ( Fig. 4 ) tips sharp, separated from each other by a distance of 0.73 mm; in ventral and dorsal views with few, short, whitish hairs.

Measurements (in mm): TL, 61.4; Ab, 46; MWh, 7.7; posterior border of occiput, 2; occiput length, 0.7; Hf, 5.6; FW, 36.5; HW, 34.5; FW width (at level of nodus), 8, HW width, 10; pt, 4.7; cerci, 3.

Figures

FIGURES 1 – 4. Phyllogomphoides enriquei sp. nov., holotype ♂. 1) Head and thorax, lateral view (head turned up to the left); 2) S 8 ¯ 10 and caudal appendages, left lateral view, showing inferior margins of S 8 - 9 foliate and scalloped; 3) Accessory genitalia, ventral view: alb, anterior lobe of anterior hamule; Ah, anterior hamuli; Alm, anterior lamina; dt, denticles; fl, flagella; msp, middle spine; n, notch; plb, posterior lobe of anterior hamule; psp, posterior spine of anterior lobe of anterior hamule; V 1, V 4, segments 1 and 4 of vesica spermalis; 4) S 9 ¯ 10 and caudal appendages, dorsal view. Ce, cercus; dt, dorsal tooth; Ep, epiproct.

FIGURES 5 – 6. Details of Phyllogomphoides spp. 5) Phyllogomphoides enriquei sp. nov., holotype ♂. Caudal appendages, left lateral view. Ce, cercus; dt, dorsal tooth; dsp, dorsal spine; Ep, epiproct; vsp, ventral spine. 6) Phyllogomphoides luisi, ♂ (Xochitepec). Accessory genitalia, ventral view.