Delta de Saussure, 1855

Pannure, Arati & Carpenter, James M., 2016, Taxonomic studies on potter wasps (Hymenoptera: Vespidae: Eumeninae) of south India, Zootaxa 4171 (1), pp. 1-50 : 15-16

publication ID	https://doi.org/10.11646/zootaxa.4171.1.1
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DOI	https://doi.org/10.5281/zenodo.4499329
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scientific name	Delta de Saussure, 1855
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Genus Delta de Saussure, 1855 View in CoL View at ENA

Delta de Saussure 1855: 130 View in CoL , 132, 143, name for divisions II and III of genus Eumenes Latreille in de Saussure 1852: 44 View in CoL , 60. Type species: Vespa maxillosa De Geer, 1775 [ Vespa emarginata Linnaeus, 1758 View in CoL ], by subsequent designation ( Bequaert 1925a: 137), erroneously as Sphex maxillosus De Geer , corrected by Bequaert 1926: 487. Senior subjective synonym of Phi de Saussure, 1855 (type species: Vespa arcuata Fabricius, 1775 ) and of Erinys Zirngiebl, 1953 (type species: Vespa unguiculata Villers, 1789 by monotypy). Raised to generic rank by Blüthgen 1953: 3.

Delta: Carpenter 1986: 68 View in CoL ; van der Vecht & Carpenter 1990: 18; Nguyen 2015b: 95 –96.

Diagnosis. Mandibles elongate, longer than length of clypeus, teeth absent or inconspicuous. Clypeus little longer than wide, shallowly emarginate or widely truncate apically. Cephalic foveae absent. Vertex narrow and sloping behind lateral ocelli. Anterior face of pronotum smooth and shiny without medial pits or foveae. Thorax globular in shape, longer than wide ( Fig. 13 View FIGURES 13 – 18 ). Pronotal carina usually incomplete, not developed on lateral sides of pronotum. Notauli absent. Pretegular carina present ( Fig. 18 View FIGURES 13 – 18 ). Epicnemial carina absent on mesepisternum. Tegula longer than wide, generally rounded or weakly emarginate adjoining parategula, posterior end not reaching end of parategula ( Fig. 25 View FIGURES 25 – 30 ). Scutellum generally convex. Metanotum not dentate. Axillary fossa wide ( Fig. 25 View FIGURES 25 – 30 ). Propodeal dorsum below plane of metanotum, sloping posteroventrally. Superior carina absent. Propodeal orifice wide dorsally. Submarginal carina not produced as pointed/rounded process above valvula. Propodeal vuvlula not separated from submarginal carina posteriorly. Metasoma petiolate, petiole length less than 1.25 × length of mesosoma, never shorter than mesosoma ( Figs 64 View FIGURES 64 – 73 , 76 View FIGURES 74 – 78 ) (this character distinguish Delta from closely related Phimenes and Oreumenoides ). T1 usually smooth and wider in apical half. S1 rather gradually widening towards apex, lateral margins of T1 not meeting ventrally usually visible along entire petiole length ( Fig. 69 View FIGURES 64 – 73 ). Apical margin of T2 not lamellate ( Fig. 73 View FIGURES 64 – 73 ). S2 usually concave medially. Mid tibia with one apical spur. SMC2 basally acute. Prestigma equals or little longer than pterostigma. Ƌ: F11 hooked, pointed apically, longer than previous ones; F8 with a cavity on its inner margin ( Fig. 12 View FIGURES 1 – 12 ). Body length usually more than 20 mm.

Distribution. Southern Palearctic, Oriental, Australian, Ethiopian Regions and New World (introduced).

References

Bequaert, J. C. (1925 a) Eumenes dyscherus H. de Saussure. A Neotropical, not an African wasp, and other notes on synonymy (Hymenoptera). Bulletin of the Brooklyn Entomological Society, 20 (3), 134 - 140.

Bequaert, J. C. (1926) The genus Eumenes Latrielle in South Africa with a revision of the Ethiopian species (Hymenoptera). Annals of the South African Museum, 23, 483 - 577.

Bluthgen, P. (1953) Portuguese and Spanish Wasps. Memorias e Estudos do Museo Zoologico da Universidade de Coimbra, 218, 1 - 23.

Carpenter, J. M. (1986) A synonymic generic checklist of the Eumenidae (Hymenoptera: Vespidae). Psyche, 93, 61 - 90. http: // dx. doi. org / 10.1155 / 1986 / 12489

de Saussure, H. (1852) Etudes sur la Famille des Vespides 1. Monographie des Guepes solitaires ou de la tribu des Eumeniens. Masson, V., Paris and Kessmann, J., Geneva, 1 - 128 pp.

Fabricius, J. C. (1775) Systema Entomologiae, sistens insectorum classes, ordines, genera, species, adiectis synonymis, locis, descriptionibus, observationibus. Officina Libraria Kortii, Flensburgi et Lipsiae [Flensburg and Leipzig, Germany], xxxii + 832 pp.

Linnaeus, C. (1758) Systema naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Ed. 10. Lipsiae, impensis. Beer, G. E., 823 pp.

Nguyen, L. T. P. (2015 b) Taxonomic notes on the genus Delta de Saussure (Hymenoptera: Vespidae: Eumeninae) from Vietnam. Animal Systematics Evolution and Diversity, 31 (2), 95 - 100.

van der Vecht, J. & Carpenter, J. M. (1990) A catalogue of the genera of the Vespidae (Hymenoptera). Zoologische Verhandelingen, 260, 1 - 62.

Figures

FIGURES 13 – 18. Mesosoma, lateral view. 13, 18, Delta conoideum; 14, 15, Pareumenes brevirostratus; 16, Coeleumenes i. impavidus; 17, Eumenes architectus.

FIGURES 25 – 30. Mesosoma, dorsal view. 25, Delta conoideum; 26, Pareumenes brevirostratus; 27, Coeleumenes i. impavidus; 28, Discoelius sp.; 29, Antodynerus limbatus; 30, Rhynchium carnaticum.

FIGURES 64 – 73. Metasoma. 64, 69, 73, Delta conoideum; 65, Phimenes flavopictus; 66, Labus pusillus; 67, Cyrtolabulus suavis; 68, 72, Eumenes architectus; 70, Discoelius sp.; 71, Coeleumenes i. impavidus.

FIGURES 74 – 78. Metasoma, dorsal view. 74, Zethus ceylonicus; 75, Eumenes architectus; 76, Delta conoideum; 77, Oreumenoides edwardsii; 78, Coeleumenes i. impavidus.

FIGURES 1 – 12. Head, frontal view. 1, Eumenes architectus; 2, Phimenes flavopictus; 3, Labus pusillus; 4, Antepipona sp.; 5, Pareumenes brevirostratus; 6, Coeleumenes i. impavidus; 7, Anterhynchium mellyi; 8, Xenorhynchium nitidulum; 9, P. flavopictus; 10, Oreumenoides edwardsii; 11, Zethus ceylonicus; 12, Delta e. esuriens. 9 – 12. ♂