Zethus (Zethoides) perilloi Lopes, 2024

Lopes, Rogério B. & Noll, Fernando B., 2024, Taxonomic notes on the Zethus olmecus de Saussure, 1875 species group (Hymenoptera, Vespidae, Eumeninae), with the description of five new species, Zootaxa 5437 (3), pp. 363-383 : 375-376

Zethus (Zethoides) perilloi Lopes , sp. n.

( Figs 92, 93 )

Type material. Holotype, ♀, “ BRASIL, Pará , Trombetas / (BC2-IG)/ 14–24.xii.2006 / L. Perillo col.” [ UFMG]. P aratype, 1 ♀, “ BRASIL, Amazonas/ Manaus, Res. Ducke/ 07–21.xii.1994 / J.A. Rafael & J. Vidal ” [ MPEG].

Diagnosis. The combination of microstriae present on the mesoscutum and scutellum while absent on other mesosomatic sclerites and the irregular punctation on the pronotum separate this species from others in the group.

Description. Female. Coloration. Black, with the following markings creamy-yellow: clypeus, except for small dorsal mid-dorsal spot; mandible; spots above antennal sockets and ocular sinus; hypostoma; inferior half of gena with wide band extending through dorsal half; wide band from submedian portion of pronotum extending to, but not reaching, pronotal lobe; proepisternum; parategula; tegula, except for central region; mesepisternum with scrobal spot and posterior spot below mesepimeron; pairs of large spots on scutellum and metanotum; forelegs except posterior face of forecoxae and stripe along dorsal face of femur; lateral elongate spot on outer surface of midcoxa; wide ventro lateral stripe on midfemur; outer surface of midtibia; mid basitarsi; dorso-lateral stripe on hind tibia; bands on T1–3 and S2 and 3. Testaceus: antennae ventrally; center of tegula; most of mid and hindtarsi. Dark yellow: band on T4–5 and S4–5. Apical propodeal lamella and wings are hyaline. Structure. Mandible 5- toothed. Clypeus with straight apex. Dorsum of clypeus and interantennal carina flat. Gena in dorsal view convex. Pronotum long, humeral-tegular distance longer than the inter-humeral distance. Pronotal carina with constant height. Pronotal angles not projected. Parategula digitiform. Tegula regularly convex. Scutellum flat. Metanotum slightly convex. Mid-tibia with two spurs. Dorsum of propodeum leveled with metanotum and scutellum. Apical propodeal lamella triangular with wide rounded tip. T 1 in dorsal view with angulate expansion. S2 regularly convex. Sculpture. Microstriae widely present on clypeus, frons, mesoscutum and scutellum. Clypeus moderately striato-punctate. Frons and anterior half of gena with moderate macropunctation and sparse micropuncations between microstriae. Posterior half of gena smooth and shiny. Vertex very densely micropunctate, Pronotum dorsally with dense macropunctation on anterior portion, becoming sparser, giving way to small striato-punctation and shagreening on postero-lateral region. Mesoscutum and scutellum with moderate shallow small macropunctation, eventually coalescent and eventually striato-punctate. Notaulices complete, but evident only on posterior third of mesoscutum. Metanotum irregularly punctate varying density and size along sclerite. Propodeum with large crater-like punctures, smaller and coalescent laterally without stria medially. Lateral propodeal carina complete. Submedian carina basally angulated and reaching about ¾ of propodeum length. Submarginal carina with straight dorsal margin and dorso-lateral angles obtuse. T1 with dense macropunctation intercalated by smooth areas. T2–3 with sparse small macropunctures obscured by dense micropunctation. S2 moderately macropunctate. T4–6 and S4–S6 with light transverse shagreening, apically with moderate punctures. S6 with moderate micropunctures. Pilosity. Head mostly bare. Vertex with fulvous tomentum. Dorsum of pronotum, mesoscutum and scutellum nearly bare, with at most very sparse and very minute setae. Lateral face of pronotum, anterior face of mesepisternum, metapleura and propodeum with dense thin pilosity, apex of propodeum longer and erect. Sparse erect long hairs on apical rows of T3–5. Long setae on S2 and apical rows on S3–5. Erect sparse setae on posterior half of S6, short medially, longer apically. S6 covered in thick short erect setae. Measurement. Forewing length 7.5 mm.

Male. Unknown.

Etymology. The species is named after Lucas Perillo, collector of the holotype.

Distribution. Brazil (Pará).

Observations. The female paratype has more regular rather than creamy yellow markings and does not have the posterior spot below the mesepimeron. Also, the micropunctation on the mesepisternum below the dorsal suture is visible only margining the scrobal groove.

Figures

FIGURES 92, 93. Zethus perilloi sp. n., female holotype. 92. Habitus. 93. Head, frontal view. Scales: 1.0 mm.