Sakhalinoctonus Davidian & Manukyan & Belokobylskij 2021, gen. nov.
Genus Sakhalinoctonus Davidian, gen. nov. Type species. Sakhalinoctonus alexrasnitsyni Davidian, sp. nov. Etymology. The new genus name is composed from Sakhalin, name of island where the studied amber was collected, and part of the aphidiine genus name “ Monoctonus ”. The gender is masculine. Diagn...
| Main Authors: | , , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://zenodo.org/record/5780212 https://doi.org/10.5281/zenodo.5780212 |
| Summary: | Genus Sakhalinoctonus Davidian, gen. nov. Type species. Sakhalinoctonus alexrasnitsyni Davidian, sp. nov. Etymology. The new genus name is composed from Sakhalin, name of island where the studied amber was collected, and part of the aphidiine genus name “ Monoctonus ”. The gender is masculine. Diagnosis. Mandible bidentate; maxillary palpus 4-segmented. Antenna (Fig. 2) 12-segmented, filiform, densely pubescent. Mesoscutum (Figs 1, 2) probably with complete notauli. Propodeum with large median areola delineated by prominent carinae. In forewing (Fig. 3A, B), pterostigma narrowly triangular; metacarpus (1-R1) relatively hardly perceivable, not reaching wing apex. Radial (r, 3-SR, SR1), medial (1-SR+M, 2-M, 3-M) and parallel(CU1a) veins of forewing long and almost reaching distal margin of wing. First and second radiomedial (submarginal) cells fused together with discoidal (discal) cell and formed united large medial cell. Second transverse anal vein (a) present, but very fine. Hind wing without closed cells. Legs (Figs 1, 2) long; hind leg about as long as body, covered by dense and semi-erect setae (as those on body). Petiole of metasoma (Figs 1, 2) long, slightly widened towards apex, about 4.0 times as long as its width medially. Ovipositor weakly curved down, wide basally, acuminate towards apex and with subapical dorsal notch. Ovipositor sheath (Fig. 3C) relatively long, about 6.0 times longer than maximum width, gradually tapered from base towards apex and very narrowly rounded at apex, weakly curved downward, covered by mainly long setae. Remarks. Sakhalinoctonus gen. nov. is the most similar to the fossil genera Protacanthoides Mackauer, 1961 (type species: Trioxys obscuriformis Quilis, 1940 = Trioxys fossilis Mackauer, 1959) and Promonoctonia Starý, 1973 (type species: Aphidius quievreuxi Quilis, 1940) by the small number of antennal segments, presence of the closed medial cell in the forewing, and downward curved and taped apically ovipositor sheaths. Protacanthoides and Promonoctonia are characterised ... |
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