Zethus pracuuba Silveira 2025, sp. nov.
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2025
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| author | Oliveira, Suelen Cristina Da Silva Cruz De Gomes, Rayane Sales Lopes, Rogerio Botion Silveira, Orlando Tobias |
| author_facet | Oliveira, Suelen Cristina Da Silva Cruz De Gomes, Rayane Sales Lopes, Rogerio Botion Silveira, Orlando Tobias |
| contents | <p><b><i>Zethus pracuuba</i> Silveira, sp. nov.</b></p><p>(Figs 8, 24, 40, 61)</p><p><b>Diagnosis.</b> Small size, wing length 9 mm; lamella of T2 curled upwards, posterior border not so strongly raised, and noticeably lower at sides; T1 with flattened bristles only, T2 with scale-like setae; metanotum with lateral margin raised, carinate and forming prominent process projecting backwards, anterior margin with distinct median keel or spine; pronotal pretegular carina very strong and prominent; mesoscutum closely striatopunctate, with welts; posterior margin of tegula markedly turned inwards but not quite transverse, posterior lobe small and angularly pointed; propodeal apical lamella as a distinct angular lobe; sculpture of frons striate with interspersed punctiform patterns (Fig. 40); sculpture of middle section of T1 less dense, with shining interstices measuring two to four puncture diameters (Fig. 61); black insect with not very extensive yellow marks</p><p><b>Description</b>. FEMALE. Wing length 9 mm; mandible apical margin with a small inflected sector between the first and second teeth; clypeus wider than long, Cl_H/ W 0.73, apex truncate, ventral margin straight in apical view forming an oblique plane weakly sulcated; interantennal area with a strong median vertical carinate ridge; occipital carina well raised and inclined forward, ventrally the branch of the carina that diverges medially forms a definite edged border at sides of the buccal cavity; pronotum with humeral region projecting angularly outwards, subhumeral area very narrow, critical subhumeral distance about 1.0 mod; pronotal carina with lamella high, inclined forward; mesoscutum distinctly wider than long, Msc_L/ W 0.82, with distinct welts measuring ca 0.50 X length of the mesoscutum; tegula with general contour shaped as an elongate oval, but with posterior margin markedly turned inwards while not quite transverse, and with small angularly pointed posterior lobe; scutellum relatively plane, laterally compressed; process of metanotum lateral margin high and projecting backwards, anterior metanotal margin with a distinct median keel and with other two smaller adjoining ones; propodeum with submedian carina well developed and associated to distinctive striae on dorsolateral area; lateral carina quite elevated, gradually raised to a higher point at middle; propodeal apical lamella distinctly projecting as an angular rounded lobe; post-stem dorso-anterior region of T1 without a median longitudinal carina; T1 moderately short and considerably wide, distinctly convex (T1 scale: T1/Mpl ca. 1.03; width: T1md_W/T1 0.55; convexity: T1md_ H/T1 0.48; total divergence: T1_Wap/St 2.8; apical convergence: T1_Wmd/ap 1.23; stem of T2 very wide, StT2/StT1 1.77); distal lamella of T2 curled upward from side to side, elevated portion not very high and distinctly lower at sides; distal lamella of T3 and S3 continuously developed from side to side.</p><p><i>Sculpture</i>. Clypeus with shallow macropunctures; frons and vertex striatopunctate; pronotum above reticulate-punctate; mesoscutum striatopunctate; scutellum mostly striatopunctate, striae strong behind; propodeum with strong striae on dorsal region outwards from submedian carina and on the lateral surface; sculpture of middle section of T1 with shining interstices measuring two to four puncture diameters; T2 shining with regular moderate dense pattern of mesopunctures.</p><p><i>Vestiture</i>. Whole body with variably elongate bristles, with whitish pubescence on gena, and sides of mesosoma and propodeum; T1 with flattened bristles only; T2 dorsally with strong flattened bristles and scale-like setae.</p><p><i>Color</i>. Black with many yellow areas and marks as follows: base of mandible largely; underside of antennal scape; paired dorsolateral spots on clypeus; paired marks adjacent to antennal sockets; band adjacent to pronotal carina; mesoscutal welts; minute dorsal spot on mesepisternum; anterior and posterior marks on tegula; parategula; two lateral marks on scutellum; transversal band on metanotum; minute inner mark on mid coxa; small lateral mark on hind coxa; elongate marks on external face of all femora and tibiae; paired small to medium sized anterior dorsal spots on propodeum; paired small anterior central-dorsal spots on the widened part of T1, and apical band on T1 joining short symmetrical lateral marks; paired large irregular anterior lateral mark on T2; distal band on T2–T5, and S2–S5; light brown are the underside of antennal apex; apical area of mandible; distal tarsal articles. <i>Wing</i> with membrane hyaline (slightly infumated on some distal areas), with brown veins.</p><p>MALE. unknown</p><p><b>Distribution.</b> Brazil: Amapá (Fig. 90B).</p><p><b>Type material.</b> Holotype, ♀, Brazil, Amapá, Município de Pracuúba, Pernambuco/ mata, 27.x.2004, O. Silveira col. (MPEG).</p><p><b>Etymology.</b> The specific epithet is a reference to the type locality, Pracuúba, in Amapá state, Brazil.</p><p><b>Remarks.</b> This is one of the two species of the group known to occur in the Brazilian state of Amapá, but occurrence there of <i>Z. trispinosus</i> is highly expected since it has been recorded from other areas of the Guiana shield. <i>Zethus pracuuba</i> <b>sp. nov.</b> is known only from the female and is superficially similar to the next species <i>Z. amapaensis</i> <b>sp. nov.</b>, but they can be promptly separated with the characters presented in the key.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_19137823 |
| institution | Zenodo |
| language | |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Zethus pracuuba Silveira 2025, sp. nov. Oliveira, Suelen Cristina Da Silva Cruz De Gomes, Rayane Sales Lopes, Rogerio Botion Silveira, Orlando Tobias Biodiversity Taxonomy Animalia Arthropoda Insecta Hymenoptera Eumenidae Zethus Zethus pracuuba <p><b><i>Zethus pracuuba</i> Silveira, sp. nov.</b></p><p>(Figs 8, 24, 40, 61)</p><p><b>Diagnosis.</b> Small size, wing length 9 mm; lamella of T2 curled upwards, posterior border not so strongly raised, and noticeably lower at sides; T1 with flattened bristles only, T2 with scale-like setae; metanotum with lateral margin raised, carinate and forming prominent process projecting backwards, anterior margin with distinct median keel or spine; pronotal pretegular carina very strong and prominent; mesoscutum closely striatopunctate, with welts; posterior margin of tegula markedly turned inwards but not quite transverse, posterior lobe small and angularly pointed; propodeal apical lamella as a distinct angular lobe; sculpture of frons striate with interspersed punctiform patterns (Fig. 40); sculpture of middle section of T1 less dense, with shining interstices measuring two to four puncture diameters (Fig. 61); black insect with not very extensive yellow marks</p><p><b>Description</b>. FEMALE. Wing length 9 mm; mandible apical margin with a small inflected sector between the first and second teeth; clypeus wider than long, Cl_H/ W 0.73, apex truncate, ventral margin straight in apical view forming an oblique plane weakly sulcated; interantennal area with a strong median vertical carinate ridge; occipital carina well raised and inclined forward, ventrally the branch of the carina that diverges medially forms a definite edged border at sides of the buccal cavity; pronotum with humeral region projecting angularly outwards, subhumeral area very narrow, critical subhumeral distance about 1.0 mod; pronotal carina with lamella high, inclined forward; mesoscutum distinctly wider than long, Msc_L/ W 0.82, with distinct welts measuring ca 0.50 X length of the mesoscutum; tegula with general contour shaped as an elongate oval, but with posterior margin markedly turned inwards while not quite transverse, and with small angularly pointed posterior lobe; scutellum relatively plane, laterally compressed; process of metanotum lateral margin high and projecting backwards, anterior metanotal margin with a distinct median keel and with other two smaller adjoining ones; propodeum with submedian carina well developed and associated to distinctive striae on dorsolateral area; lateral carina quite elevated, gradually raised to a higher point at middle; propodeal apical lamella distinctly projecting as an angular rounded lobe; post-stem dorso-anterior region of T1 without a median longitudinal carina; T1 moderately short and considerably wide, distinctly convex (T1 scale: T1/Mpl ca. 1.03; width: T1md_W/T1 0.55; convexity: T1md_ H/T1 0.48; total divergence: T1_Wap/St 2.8; apical convergence: T1_Wmd/ap 1.23; stem of T2 very wide, StT2/StT1 1.77); distal lamella of T2 curled upward from side to side, elevated portion not very high and distinctly lower at sides; distal lamella of T3 and S3 continuously developed from side to side.</p><p><i>Sculpture</i>. Clypeus with shallow macropunctures; frons and vertex striatopunctate; pronotum above reticulate-punctate; mesoscutum striatopunctate; scutellum mostly striatopunctate, striae strong behind; propodeum with strong striae on dorsal region outwards from submedian carina and on the lateral surface; sculpture of middle section of T1 with shining interstices measuring two to four puncture diameters; T2 shining with regular moderate dense pattern of mesopunctures.</p><p><i>Vestiture</i>. Whole body with variably elongate bristles, with whitish pubescence on gena, and sides of mesosoma and propodeum; T1 with flattened bristles only; T2 dorsally with strong flattened bristles and scale-like setae.</p><p><i>Color</i>. Black with many yellow areas and marks as follows: base of mandible largely; underside of antennal scape; paired dorsolateral spots on clypeus; paired marks adjacent to antennal sockets; band adjacent to pronotal carina; mesoscutal welts; minute dorsal spot on mesepisternum; anterior and posterior marks on tegula; parategula; two lateral marks on scutellum; transversal band on metanotum; minute inner mark on mid coxa; small lateral mark on hind coxa; elongate marks on external face of all femora and tibiae; paired small to medium sized anterior dorsal spots on propodeum; paired small anterior central-dorsal spots on the widened part of T1, and apical band on T1 joining short symmetrical lateral marks; paired large irregular anterior lateral mark on T2; distal band on T2–T5, and S2–S5; light brown are the underside of antennal apex; apical area of mandible; distal tarsal articles. <i>Wing</i> with membrane hyaline (slightly infumated on some distal areas), with brown veins.</p><p>MALE. unknown</p><p><b>Distribution.</b> Brazil: Amapá (Fig. 90B).</p><p><b>Type material.</b> Holotype, ♀, Brazil, Amapá, Município de Pracuúba, Pernambuco/ mata, 27.x.2004, O. Silveira col. (MPEG).</p><p><b>Etymology.</b> The specific epithet is a reference to the type locality, Pracuúba, in Amapá state, Brazil.</p><p><b>Remarks.</b> This is one of the two species of the group known to occur in the Brazilian state of Amapá, but occurrence there of <i>Z. trispinosus</i> is highly expected since it has been recorded from other areas of the Guiana shield. <i>Zethus pracuuba</i> <b>sp. nov.</b> is known only from the female and is superficially similar to the next species <i>Z. amapaensis</i> <b>sp. nov.</b>, but they can be promptly separated with the characters presented in the key.</p> |
| title | Zethus pracuuba Silveira 2025, sp. nov. |
| topic | Biodiversity Taxonomy Animalia Arthropoda Insecta Hymenoptera Eumenidae Zethus Zethus pracuuba |
| url | https://doi.org/10.5281/zenodo.19137823 |