Gastrodynerus guatemalensis Grandinete & Carpenter, 2019

Grandinete, Yuri Campanholo, Cortes, Gustavo Bellini & Carpenter, James Michael, 2019, On the genus Gastrodynerus Bohart, 1984 (Hymenoptera: Vespidae: Eumeninae), Zootaxa 4671 (2), pp. 240-250 : 241-242

Gastrodynerus guatemalensis Grandinete & Carpenter , sp. nov.

( Figs 6 , 11 )

Comments and diagnosis. Gastrodynerus guatemalensis may be recognized by the almost entirely yellow posterior surface of the propodeum, and by the coarse and reticulated punctation on the dorsal surface of propodeum ( Fig. 11 ), which is different from any other species in the genus.

Description. Holotype female. Color: Integument shiny. Black, with yellow marks as follows: inner half of mandibles; two wide spots on both laterals of clypeus; small spot right above inter-antennal region and on upper half of gena; inner half of antennae; stripe along the anterior and posterior margins of pronotum; pronotal lobe; spot on upper half of mesepisternum, adjacent to the mesepimeron; small spot on anterior and posterior extremities of tegula and both sides of scutellum; scutellar crest; metanotum entirely; lower half of dorsal surface of propodeum and posterior surface of propodeum yellow, except for a black triangle on center; broad stripe on apex and lateral of T1; entirely S1; broad stripe on apex of T2 and S2; narrow stripe on apex of S3–S5. Apex of clypeus and external surface of tegula translucent. Tibiae and tarsi brownish. Narrow stripe on apex of T3–T5. Wings hyaline, with costal, part of radial and marginal cells and pterostigma brownish. Veins brownish.

Pubescence: Short brownish pubescence over body, except for some erect bristles on frons, vertex, dorsal surface of pronotum and posterior surface of propodeum, mostly close to the submarginal carina. Pubescence on mesepisternum, metanotum and propodeum whitish.

Sculpture: Clypeus with shallow punctures, separate from each other, more evident of upper half. Frons, vertex and upper half of gena with coarse and reticulate punctures. Lower half of gena with weaker punctures, clearly distant from each other. Pronotum, mesoscutum and scutellum with coarse and reticulate punctation (punctures slightly bigger than those on head); transverse line of wider and deeper punctures on apical margin of scutellum; metanotum with some coarse punctures, except on lateral region; mesepisternum and mesepimeron with coarse (smaller than those on mesoscutum) and more distant to each other; bigger punctures along the mesepisternal suture; dorsal surface of propodeum with coarse (wider than any punctures on head and mesoscutum) and reticulate punctures ( Fig. 11 ); posterior half of lateral surface of propodeum with some small punctures; dorsal surface of propodeum with no evident punctures and some transverse striae. T1 with coarse and reticulate punctures, wider on basal half (as in dorsal surface of propodeum). S1 with no evident punctures (mostly due to the yellow color of the sclerite). T2 with shallow and small punctures, slightly wider on basal third and on apex, but all very distant from each other. S2 with shallow punctures, homogeneously distributed, except on basal portion, before summit, where the punctures are almost absent. Incipient punctures on apex of T3–T5 and S4–S5. Coarse punctures (as wide as the ocelli) concentrated on central portion of the anterior half of S3. T6 and S4–S6 with no evident punctures.

Structure: Clypeus convex in lateral view, wider than long, with two apical teeth; inter-antennal region longitudinally cariniform, with a deep pit right beside the carina, on lower half, and one adjacent to the antennal socket, on upper half; cephalic fovea present, close to each other; occipital carina strongly developed on gena, becoming weaker on vertex and interrupted behind the cephalic fovea; pronotal fovea present and broad; pronotal carina, on lateral surface, strongly developed, weaker and interrupted dorsally on central region; humeral region projected, tooth-like; parategula lamelliform, flattened laterally; scutellum flat; a longitudinal furrow on the dorsal surface of propodeum; longitudinal carina on posterior surface of propodeum, stronger at the base, becoming weaker upwards; a transverse carina between dorsal and posterior surface of propodeum, probably formed due the strong punctures ( Fig. 11 ); submarginal carina weakly projected and fused to the propodeal valve; external margin of propodeal valve rounded; longitudinal carina on posterior coxa strongly projected, tooth-like; T1 slightly longer than wide; T2 longer than wide; S2 strongly truncate at base; row of small teeth on apex of S6.

Variation: No significant differences were observed. The transverse carina on the posterior surface of propodeum may be, sometimes, difficult to observe due the yellow color.

Male: Unknown.

Etymology. The epithet refers to the distribution of the species, which is restricted to Guatemala.

Distribution. Guatemala.

Type material. The female holotype ( MCZ) is in good condition and bears the labels: ‘Moca/Guatalon/ 1000 m. /Mar. Apr. 31 ’ ‘ Guatemala /J. Bequaert’ ‘MCZ’ ‘ Ectodynerus / ♀ sp. 2/det. R. M. Bohart’ . Two female paratypes ( MCZ) bear the same labels: ‘Moca/Guatalon/ 1.000 m./Mar. Apr. 31 ’ ‘ Guatemala /J. Bequaert’ ‘MCZ’ . One female paratype ( MCZ) bears the labels: ‘Helvetia, 1.000 m./San Sebastian, Reu/ Apr. 21–22, 1931 ’ ‘ Guatemala /J. Bequaert’ ‘MCZ’ . One female paratype ( MCZ) bears the labels: ‘SaEmilia/Pochuta/ 1.000 m./Feb. Mar. 31 ’ ‘ Guatemala /J. Bequaert’ ‘MCZ’ . One female paratype ( AMNH) bears the labels: ‘Helvetia, 1.000 m./San Sebastian, Reu/ Apr. 21–22, 1931 ’ ‘ Guatemala /J. Bequaert’ ‘MCZ’.

Figures

FIGURES 1–8. Habitus from species of Gastrodynerus: 1: G. vanduzeei (Holotype, female); 2: G. stangei (Holotype, male); 3: G. tacubayae (Holotype, female—photo taken by Dr. Bernard Landry—Muséum d’Histoire Naturelle de Geneve [MNHN]); 4: G. searsi (Holotype, male); 5: G. yungaensis (Holotype, female); 6: G. guatemalensis (Holotype, female); 7: G. barretti (Holotype, female); 8: G. aimara (Holotype, male). Scale bar = 1mm.

FIGURES 9–14. 9: Vertex of G. vanduzeei with the two polished tubercles; 10: Vertex of G. stangei, with no tubercles; 11: Posterior surface of propodeum from G. guatemalensis; 12: Posterior surface of propodeum from G. barretti; 13: S3 from G. vanduzeei (Holotype, female); 14: S3 from G. guatemalensis. Scale bar = 1mm.