Asialassus, Nabozhenko, Maxim & Ando, Kiyoshi, 2018
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publication ID |
https://doi.org/10.17109/AZH.64.4.277.2018 |
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persistent identifier |
https://treatment.plazi.org/id/03BBAE26-FFD8-FFD6-FE23-A1D357EB390F |
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treatment provided by |
Felipe (2021-11-30 12:59:17, last updated 2024-07-02 14:18:32) |
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scientific name |
Asialassus |
| status |
gen. nov. |
Asialassus gen. n.
(Figs 17–26)
Type species: Helops cordicollis Marseul, 1876
Diagnosis. Male. Body slender, shiny, brown, sometimes with metallic glance. Eyes large, convex. Head with or without posterior grooves beginning at lower aspect of eyes. Male antennae constantly thin, antennomeres not more thickened than in female. Anterior margin of frontoclypeus straight. Pronotum large, usually moderately convex. Prothoracic hypomera with longitudinal or irregular wrinkles. Prosternum clearly flattened, with distinct transverse wrinkles before procoxae ( Figs 18B, D View Fig , 19C View Fig , 20B View Fig , 21F, G View Fig , 22C View Fig , 23B View Fig , 24F View Fig , 25C View Fig , 26E View Fig ). Prosternal process with large acute teeth laterally, depressed at middle, strongly projected apically ( Figs 18C View Fig , 20C, D View Fig , 21F, G View Fig , 22C, D View Fig , 23C View Fig , 24F, H View Fig , 25B, C View Fig , 26E, F View Fig ). Elytra without humeral calli, with clear striae, punctures in striae connected with each other. Interstriae without tubercles, but with simple coeloconic sensilla. Eighth interstria apically more convex than the rest, connected with elytral margin. Dorsal epipleural carina reaching eighth interval at apex. Elytral epipleura not reaching elytral apex and terminate at level of 4th and 5th abdominal ventrites. Hind wings developed (the ability to fly is unknown to us). Mesoventrite slightly depressed at middle. Metaventrite transverse, glabrous. Abdominal ventrites without hair brushes. Male protibiae curved, ladle-shape, widened and flattened apically, often with one or two teeth before apex ( Figs 18G View Fig , 19B View Fig , 21C, D View Fig , 22E, F View Fig , 24B, C View Fig , 25D, E View Fig , 26B, C View Fig ); mesotibiae sometimes with line of large ( Fig. 18H View Fig ) or small granules ( Figs 22H View Fig , 25F View Fig ) on ventral side. Male tarsi not widened. Trochanters with single long seta.
Aedeagus ‘nalassoid’, weakly sclerotized, apical piece with flattened keel at apex (Figs 17A–O).
Female. Body robuster than male, antennae shorter. Prosternal process simple, without teeth ( Figs 18E View Fig , 19C View Fig ). Tibiae not modified ( Fig. 19B View Fig ). Procoxae with elevated portion near trochanters, prostenal process depressed at middle between procoxae ( Fig. 18F View Fig ). Genital tubes (Fig. 17P). Spermatheca consists of only one non-branched tube, with clear basal duct. Accessory gland short, a little longer than spermatheca or subequal to spermathecal length.
Comparison. The genus differs from all known Helopini in the structure of toothed and depressed male prosternal process, transverse wrinkles of flattened prosternum before procoxae and elevated outer sides of female procoxae. Asialassus gen. n. is the most close to the genus Nalassus . See differeces between these two genera in the key above.
Composition. The new genus contains six species from Japan and Korean Peninsula.
Etymology. The name derives from compound word of “Asia” and generic name “ Nalassus ”.
Gender. Masculine.
MARSEUL, S. A. DE (1876): Coleopteres du Japon recueillis par M. Georges Lewis [sic: George Lewis]. Enumeration des Heteromeres avec la description des especes nouvelles. - Annales de la Societe Entomologique de France (5) 6: 93 - 142.
Fig. 18. Asialassus cordicollis, details of structure: A = head, ventral view, B = male prosternum, C = male prosternal process, D = female prothorax and fore legs, ventral view, E = female prosternal process, ventral view, F = female prothorax, posterior transverse view (lateral arrows show elevate margin of procoxae, middle arrow shows depressed prosternal process between procoxae), G = male protibia, H = male mesotibia
Fig. 19. Asialassus amamiensis, holotype, female: A = habitus, B = protibia, C = prothorax, ventral view, D = labels of the holotype
Fig. 20. Asialassus amamiensis, male, details of structure: A = head, B = prosternum, C = prosternal process, ventral view, D = prosternal process, lateral view
Fig. 21. Asialassus kimurai, holotype and paratype: A = holotype, male, habitus, B = paratype, female, habitus, C = male protibia, dorsally, D = male protibia, ventrally, E = male mesotibia, F = male prothorax ventro-laterally, G = male prothorax, ventrally, H = aedea-
Fig. 22. Asialassus kimurai, holotype and paratype of the new junior synonym Tarpela tokunoshimana: A = holotype, male, habitus, B = paratype, female, habitus, C = male prothorax, ventrally, D = male prothorax, laterally, E = male protibia, dorsally, F = male protibia, ventrally, G = male mesotibia, dorsally, H = male mesotibia, ventrally, I = labels of the holo-
Fig. 23. Asialassus kimurai, details of structure, male: A = head, ventral view, B = prothorax, ventral view, C = prosternal process, D = protibia, ventrally
Fig. 24. Asialassus tsushimanus, male, holotype: A = habitus, B = protibia, laterally, C = protibia, ventrally, D = mesotibia, E = aedeagus, dorsal view, F = prothorax, ventral view, G =
Fig. 25. Asialassus todai, male, holotype: A = habitus, B = prothorax, ventral view, C = prothorax, lateral view, D = protibia, dorsal view, E = protibia, ventral view, F = mesotibia, G =
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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