Gastrodynerus barretti Grandinete & Cortes, 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 : 244

Gastrodynerus barretti Grandinete & Cortes , sp. nov.

( Figs 7 , 12 , 18 , 27)

Comments and diagnosis. Gastrodynerus barretti may be confused with G. aimara due to the similar color pattern, structures and pubescence, but the punctation of T1 should be used to separate them. Gastrodynerus barretti has the basal portion of T1 with strong (wider on lateral surface) reticulate punctures, becoming slightly more distant near apex ( Fig. 18 ), while G. aimara has the punctures of T1 clearly smaller and sparser, homogeneously distributed ( Fig. 19 ).

Description. Holotype female

Color: Same as Gastrodynerus yungaensis , except for smaller spots on the clypeus and mesepisternum; posterior half of metanotum black.

Pubescence: Same pattern as Gastrodynerus yungaensis , except for the absence of erect bristles on the dorsolateral surface of the propodeum.

Sculpture: Shallow and sparse punctures over clypeus; head covered with coarse and dense punctures. Mesosoma with coarse (as in head) punctures, dense on pronotum, mesoscutum, scutellum and dorsal surface of propodeum; sparser punctures on mesepisternum, mesepimeron, lateral and posterior surfaces of propodeum. Coarse (larger than on mesosoma) and dense punctures on T1 (except on basal region where there are some small and shallow punctures), becoming slightly smaller towards apex; small and sparse punctures over T2, becoming coarse and dense on pre-apical region; weak and sparse punctures on T3 and T4; T5 and T6 without punctures; S2 and S3 with small, shallow and sparse punctures, except on apical region; S4–S6 without evident punctures.

Structure: Clypeus wider than long, convex in lateral view, 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 well developed along gena, becoming weaker dorsally. Lateral pronotal carina present; pronotal carina on dorsal surface present just after the humeral projection, but very incipient and interrupted centrally; pronotal fovea present; humeral region weakly projected; parategula lamelliform, flattened laterally; scutellum flattened; a longitudinal furrow on the dorsal surface of propodeum; longitudinal carina on posterior surface of propodeum uniform all along; submarginal carina fused to the propodeal valve, weakly projected and pointed; external margin of propodeal valve rounded; longitudinal carina on posterior coxa weakly projected, rounded; T1 longer than wide, strongly concave on central region (on lateral view); transverse carina on anterior region of S1; T2 longer than wide; S2 strongly truncate at the base; row of small teeth on apex of S6.

Male: Same color pattern, except for: clypeus smaller with larger yellow marks; F11 hooked-shape, narrow and pointed, with the apex not surpassing the apex of F9. Male genitalia as in Figure 27 .

Variation: One male specimen (paratype) from Amazonas Department ( Peru) presented more extensive yellow marks, mostly on the pronotum and metasoma.

Etymology. The epithet is in honor to the entomologist Bolívar Rafael Garcete-Barrett, who questioned the identity of the specimens and advised the authors that they might belong to a new species of Gastrodynerus .

Distribution. Bolivia; Colombia; Peru.

Type material. The holotype female ( AMNH) of Gastrodynerus barretti is good condition and bears the label: ‘ PERU:/ Monson Valley/Tingo Maria/XI. 10.1954’ ‘ E. I. Schlinger/& E. S. Ross /collectors’ ‘ Gastrodynerus sp. /det B. Garcete-Barret 2002’ . Three paratype males ( AMNH) are in good condition and bear the labels: ‘ OREJA DE/CAPE- LO ( PERU)/ 1600 M. 1.5.1943 /LEG. WEYRAUCH’ ‘[Red label] 467’ ; ‘Vista Nieve/San Lorenzo Mt./XII.20.1922 Colombia’ and ‘ BOLIVIA: Coroico-/Chulomani, La Paz / III-7-1968 / Garcia & Porter’ . One paratype male ( CAS) has the metasoma in a separate label, and bears the labels: ‘ PERU: Dept. Amazonas /19 Km S. Chachapoyas/on Rio Utcubamba / 1700 m. 1.VI.1964 ’ ‘ P. C. Hutchinson /and/ J. K. Wright /Collectors’.

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.

FIGURES 15–21. 15: T1 of G. yungaensis; 16: T1 of G. searsi; 17: T1 of G. tacubayae; 18: T1 of G. barretti; 19: T1 of G. aimara; 20: T2 of G. yungaensis; 21: T2 of G. aimara. Scale bar = 1mm.

FIGURES 22–28. Male genitalia (aedeagus and paremere + volsella, respectively). 22: G. vanduzeei; 23: G. stangei; 24: G. searsi; 25: G. tacubayae; 26: G. yungaensis; 27: G. barretti; 28: G. aimara. Scale bar = 1mm.