Chrysopodes (Neosuarius) pecki, Tauber and Tauber, 2010

Tauber, Catherine, 2010, Revision of Neosuarius, a subgenus of Chrysopodes (Neuroptera, Chrysopidae), ZooKeys 44 (44), pp. 1-104 : 84-86

Chrysopodes (Neosuarius) pecki, Tauber and Tauber, 2010

Figs 40e , 41e, 57d, 59c, 63, 64d, 65

Chrysopodes (Neosuarius) pecki Tauber and Tauber, 2010: 67 [USNM, Holotype (by original designation): “ Ecuador, Galápagos Archipelago, Isla Isabela, Volcan Wolf, 4 km NE Puerto Bravo”].

Diagnosis. Chrysopodes (Neosuarius) pecki , the third endemic species of Chrysopodes (Neosuarius) from the Galápagos, is known only from two extinct volcanoes on Isabela

Figure 6 ļ. Chrysopodes (Neosuarius) nigripilosus : Male genitalia, (a) gonarcus (frontal view – beak forward, gonarcal apodeme behind) (b) gonarcus (dorsal view – rods forward, gonarcal apodemes behind (c) terminus of abdomen with eversible pouches everted (dorsal, with gonarcus rotated to lateral position). ab.t. abdominal terminus; beak, sclerotized beak at tip of mediuncus ev.p. eversible pouch g.ap. gonarcal apodeme (arm) g.b. gonarcal bridge gon gonarcus rod internal rod of mediuncus.

Island (Volcán Wolf and Volcán Alcedo), where it is sympatric with C. (N.) nigripilosus . The adults share many features with C. (N.) nigripilosus and C. (N.) nigricubitus , but they differ in having a pair of brown spots on the dorsum of the head, posterolateral to the vertex, elongate pronota ( Fig. 40e ). This species is the only one of the three Galápagos species that has forewings exceeding 13 mm in length. Like C. (N.) nigripilosus , the wings do not show dark suffusion around the crossveins. But like C. (N.) nigricubitus , the second cubital crossvein is very dark and it bears a dark brown swelling mesally; however, the swelling is smaller than that on most C. (N.) nigricubitus wings ( Fig. 63 ; Tauber and Tauber 2010, Table 2).

Although the males of C. (N.) pecki closely resemble those of C. (N.) nigripilosus and C. (N.) nigricubitus , there are some distinguishing features ( Fig. 65 ). For example, the gonarcus (length of arms, bridge width) is larger than that of either C. (N.) nigripilosus or nigricubitus ( Tauber and Tauber 2010, Table 5). Second, as in C. (N.) nigricubitus , the horizonal apodeme along the ventral margin of T9+ectoproct is relatively straight, and it has a well sclerotized, unforked, pointed tip with a small ventral knob ( Fig. 64d ). Other differences were noted in the original description ( Tauber and Tauber 2010).

Female C. (N.) pecki are distinguished by their very dark brown coloration on the fifth abdominal sternite, light brown pigmentation basally on S6, and cream coloration on the distal portion of S6 and all of S7 ( Fig. 57d ).

Description. Available in Tauber and Tauber (2010).

Larvae, Eggs, Biology. Unknown. Adult specimens were collected in April and May.

Type material. Chrysopodes (Neosuarius) pecki Tauber & Tauber. The holotype (a male, pinned) is in the National Museum of Natural History, Smithsonian Institution , Washington, D.C. ( USNM). Its labels read: (1) “ECU: Galáp: Isabela / V. Wolf, 4 kmNE. P. Bravo / humid for, 17.V.96 / uv light / S. Peck, 96–192”; (2) “ HOLOTYPE / Chrysopodes (Neosuarius) pecki Tauber & Tauber , des. 2010” [red]. There are two paratypes (females, in alcohol) in the Institut Royal des Sciences Naturelles de Belgique, Bruxelles, Belgium ( IRSN). Their labels read: (1) “ Ecuador, Galápagos Arch., Isla Isabela , Volcán Alcedo, SE crater rim at “Geyser”, 1000 m, 3/IV/1996, L. Baert, K. Desender & J.-P. Maelfait, B96/0074”; (2) “ PARATYPE / Chrysopodes (Neosuarius) pecki Tauber & Tauber , des. 2010” [yellow].

Specimens examined. Type material only.

Known distribution. Two extinct volcanoes (Volcán Wolf and Volcán Alcedo) on Isabela Island (Galapagos).

Variation. Sample size very small.

Figures

Figure 6. Measurements of male abdomen (exterior, lateral) on cleared specimen mounted in glycerin on slide with coverslip. c.c. callus cerci: maximum length (blue), maximum height (red) S7 seventh sternite: length along ventral margin (blue), height at midline, perpendicular to base line (red) S8+9 fused eighth and ninth sternites: length along ventral margin (blue), height (red) along basal margin (red), perpendicular to base line at midsegment (red), perpendicular to base line at distal end (red) T7+ex seventh tergite plus lightly sclerotized extension: length along dorsal surface (blue), height of tergite at midsegment perpendicular to length (red); height of extended section at midsegment perpendicular to length (green) T8+ex eighth tergite plus lightly sclerotized extension: length along dorsal surface (blue), height of tergite at midsegment perpendicular to length (red); height of extended section at midsegment perpendicular to length (green).

Figure 40. Chrysopodes (Neosuarius) flavescens-group: Head, prothorax, dorsum. (a) C. (N.) escomeli (b) C. (N.) flavescens (c) C. (N.) nigricubitus (d) C. (N.) nigripilosus (e) C. (N.) pecki (f) C. (N.) porterinus.

Figure 57. Abdomens, ventral. (a) Chrysopodes (Neosuarius) nigripilosus male (b) Chrysopodes (Neosuarius) nigripilosus female (c) C. (N.) nigricubitus female (d) C. (N.) pecki female. The scale applies to all images.

Figure 63. Chrysopodes (Neosuarius) pecki: Forewing, hindwing (Ecuador, Galápagos Archipelago, Isabela Island).

Figure 64. Male abdominalterminalia and enlargedviews ofthe tip ofthe caudal armon theT9+ectoproct apodeme: (a) C. (N.) nigripilosus terminus (box indicates enlarged area) (b) C. (N.) nigricubitus (caudal arm with single acute tip) (c) C. (N.) nigripilosus (caudal arm with bifurcated tip) (d) C. (N.) pecki (caudal arm with single acute tip bearing small ventral knob). The enlarged images were enhanced to highlight the caudal arms against the background.

Figure 65. Chrysopodes (Neosuarius) pecki: Male genitalia (gonarcus, lateral). g.a. gonarcal apodeme mu mediuncus s.dt. setose duct on gonoscaccus.