Published August 4, 2025
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Table 2 in Montichneumon, a new genus of Ichneumoninae (Hymenoptera, Ichneumonidae) from the high mountains of Taiwan
Authors/Creators
- 1. Department of Entomology, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Da'an Dist., Taipei 106, Taiwan.
- 2. Toyohashi Museum of Natural History, 1 - 238 Oana, Oiwa, Toyohashi, Aichi 441 - 3147, Japan. & Systematic Zoology Laboratory, Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University, 1 - 1 Minamiosawa, Hachioji-shi, Tokyo, 192 - 0397, Japan.
Description
Table 2 (continued on next page). Comparison of the diagnostic characters between Montichneumon gen. nov. and its morphologically similar genera. Abbreviation: OD = diameter of lateral ocelli.
| Montichneumon gen. nov. | Achaius Cameron, 1903 | Achaiusoides Tereshkin, 2011 | Diphyus Kriechbaumer, 1890 | Hepiopelmus Wesmeal, 1845 | Limerodops Heinrich, 1949 | Serratichneumon Riedel & Shen, 2023 | Tricholabus Thomson, 1894 | |
|---|---|---|---|---|---|---|---|---|
| Distribution | Oriental | Palearctic, Oriental | Palearctic | Palearctic, Nearctic, Oriental, Neotropical, Afrotropical, Oceanic | Palearctic, Oriental | Palearctic, Nearctic | Oriental | Palearctic, Nearctic, Oriental, Neotropical |
| Female flagellum | Bristle-shaped, thin, not widened medially | Bristle-shaped, thin, not widened medially | Bristle-shaped, moderately thick, slightly widened medially | Bristle-shaped, thin to moderately thick, slightly widened medially | Bristle-shaped, thin, slightly widened medially | Bristle-shaped, thin, slightly widened medially | Bristle-shaped, thin, slightly widened medially | Bristle-shaped, thin, slightly widened medially |
| Male flagellum | Normal | Normal | Normal | Normal | Normal | Normal | Serrated | Normal |
| White annuli | Absent | Present | Present | Present | Absent | Present | Present | Present |
| Temples | Longer than OD | Less than OD | Equal to OD | Longer than OD | Equal to OD | Longer than OD | Equal to OD | Equal to OD |
| Occipital and hypostomal carina | Meeting above mandible base | Meeting above mandible base | Meeting above mandible base | Meeting above mandible base | Meeting above mandible base | Meeting above mandible base | Meeting above mandible base | Meeting at Mandible base |
| Malar space | Longer than mandible base | Equal to mandible base | Shorter than mandible base | Shorter than mandible base | Equal to mandible base | Shorter than mandible base | Equal to mandible base | Equal to mandible base |
| Mandibles | Bidentate, long, evenly narrowed | Bidentate, narrow, parallel-sided | Bidentate, short, evenly narrowed | Bidentate, long, evenly narrowed | Bidentate, long, evenly narrowed | Bidentate, long, evenly narrowed | Bidentate, short, evenly narrowed | Bidentate, short, evenly narrowed |
| Maxillary palps | Enlarged in 2nd segment | Not enlarged in 2nd segment | Enlarged in 2nd segment | Not enlarged in 2nd segment | Not enlarged in 2nd segment | Not enlarged in 2nd segment | Not enlarged in 2nd segment | Not enlarged in 2nd segment |
| Scutellum | Flat, without lateral carina | Highly elevated, without lateral carina | Highly elevated, without lateral carina | Highly elevated, without lateral carina | Highly elevated, without lateral carina | Elevated, without lateral carina | Elevated, without lateral carina | Highly elevated, without lateral carina |
| Area basalis | Without medial tubercle | Without medial tubercle | Without medial tubercle | Without medial tubercle | With medial tubercle | Without medial tubercle | With medial tubercle | Without medial tubercle |
| Area superomedia | Present, elongated | Present, elongated | Present, transverse | Present, square or rectangular | Present, square or rectangular | Present, square or rectangular | Absent or incomplete | Present, elongated |
| Apex of area dentipara | Small teeth | Small teeths | Broad teeth | Small teeth | Small teeth | Small teeth | Without any projections | Small teeth |
| T1 postpetiole | Flat and narrow, smooth and sparsely punctate | Elevated and broad, smooth and sparsely punctate | Elevated and narrow, smooth and sparsely punctate | Elevated and broad, striate | Elevated and broad, sparsely punctate with medial impression | Elevated and broad, striate | Elevated and broad, coarsely punctate and carinate | Elevated and broad, sparsely punctate |
| Gastrocoelus | Long and narrow, shallowly impressed | Small and shallowly impressed | Long and shallowly impressed | Small or long and narrow, and shallowly impressed | Small and deeply impressed | Long and narrow, deeply impressed | Short and wide, deeply | Short and wide, deeply |
| Thyridium | Indistinct, narrower than interval distance | Indistinct, narrower than interval distance | Distinct, equal to interval distance | Almost absent to distinct, narrower than interval distance | Distinct, narrower than interval distance | Almost absent or indistinct | Distinct, wider than interval distance | Distinct, equal to interval distance |
| T2 sculptures | Sparsely and minutely punctate | Minutely punctate with longitudinal striae | Densely and minutely punctate | Densely punctate | Densely and minutely punctate | Longitudinal striate | Densely and coarsely punctate | Densely punctate |
| T2–T3 shape | Distinctly longer than wide | Equal to or slightly longer than wide | Equal to or slightly longer than wide | Equal to or slightly longer than wide | Equal to or slightly longer than wide | Distinctly longer than wide | Equal to or slightly longer than wide | Equal to or slightly longer than wide |
| T7 shape | Normal | Normal | Normal | Normal | Normal | Strongly bent downward laterally | Normal | Normal |
| Female S6 | Truncate in posterior margin | Truncate in posterior margin | Truncate in posterior margin | Truncate in posterior margin | Truncate in posterior margin | Pointed in posterior margin | Rounded in posterior margin | Pointed in posterior margin |
| Female metasomal sternites | S2–S3 unsclerotized with longitudinal fold | S2–S3 unsclerotized with longitudinal fold | S2–S3 unsclerotized with longitudinal fold | Only S2, or S2–S3 with longitudinal fold | S2 completely or largely unsclerotized, S3–S4 unsclerotized with longitudinal fold | S2–S4 completely sclerotized, or unsclerotized with longitudinal fold | S2–S4 unsclerotized with longitudinal fold | S2–S4 unsclerotized with longitudinal fold |
| Male abdominal sternum 9 | Triangularly convex in apical margin | Triangularly convex in apical margin | Unknown | Triangularly convex in apical margin | Triangularly convex in apical margin | Triangularly convex in apical margin | rounded in apical margin | Convex in apical margin with swelling |
Notes
Published as part of Chen, Hsuan-Pu, Kikuchi, Namiki & Shiao, Shiuh-Feng, 2025, Montichneumon, a new genus of Ichneumoninae (Hymenoptera, Ichneumonidae) from the high mountains of Taiwan, pp. 8-9 in European Journal of Taxonomy 1007 on page 8, DOI: 10.5852/ejt.2025.1007.2997, http://zenodo.org/record/16883268
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Additional details
Identifiers
References
- Cameron P. 1903. Descriptions of twelve new genera and species of Ichneumonidae (Heresiarchini and Amblypygi) and three species of Ampulex from the Khasia Hills, India. Transactions of the Entomological Society of London 51: 219-238. https://doi.org/10.1111/j.1365-2311.1903.tb01136.x
- Tereshkin A. M. 2011. Illustrated key to the genera of the subtribe Amblytelina of Palaearctic (Hymenoptera, Ichneumonidae, Ichneumoninae, Ichneumonini). Linzer biologische Beitrage 43 (1): 597-711.