Machaerotypus Uhler 1896
Creators: name: Li, Feng-E.
name: Yang, Lin
name: Long, Jian-Kun
name: Chang, Zhi-Min
name: Chen, Xiang-Sheng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Membracidae
Machaerotypus

description: Genus Machaerotypus Uhler, 1896
Figs 1–6, 8
Machaerotypus Uhler, 1896: 30.
Machaerotypus – Goding 1931: 303. — Kato 1940: 147. — Funkhouser 1950: 207. — Metcalf & Wade 1965: 416. — Chou & Yuan 1981: 103. — McKamey 1998: 70. — Yuan & Chou 1988: 72; 2002: 254.
Type species
Machaerotypus sellatus Uhler, 1896 = M. sibirica (Lethierry, 1896).
Diagnosis
Body usually with bright red markings. Head with vertex slightly to strongly arcuate dorsally, ventral margins oblique. Ocelli ovoid, closer to inner margin of eyes than to each other. Suprahumeral horns rounded, each with crescent-shaped ridge, not extended laterad of humeral angles. Posterior pronotal process mostly concealing scutellum, depressed at base, flat or with slight bulge in center. Humeral angle triangular and stout. Callosity smooth or slightly bristly. Scutellum exposed on both sides and at apex. Forewing multi-striped or hyaline, base with opaque sclerotization. Metathoracic tibia with three longitudinal rows of cucullate setae, trochanter without teeth.
Remarks
Compared with Yuan & Chou’s (2002) record, pronotum characteristics of four species, M. subinermis, M. ishiharai, M. stigmosus Li & Chen sp.nov., and M. nodulus Li & Chen sp.nov., were supplemented, and the key to species of Machaerotypus was updated based on Yuan & Chou (2002).
Host plant
Unknown.
Distribution
China, Japan, Russia, Korea (Fig. 7).
Checklist of species of Machaerotypus Uhler, 1896
M. arisanus (Kato, 1928); Japan, China (Taiwan).
M. camelliae Chou & Yuan, 1981; China (Yunnan).
M. ishiharai Kato, 1940; Japan (Honshu).
M. mali Chou & Yuan, 1981; China (Shaanxi).
M. nodulus Li & Chen sp. nov.; China (Guizhou).
M. rubromarginatus Kato, 1940; China (Shaanxi, Liaoning).
M. rubronigris Funkhouser, 1938; China (Zhejiang, Gansu).
M. semirubronigris Yuan & Chou, 1992; China (Sichuan).
M. sibiricus (Lethierry, 1876); Russia; Korea; Japan; China (Heilongjiang, Beijing, Shanxi, Shaanxi, Sichuan).
M. stigmosus Li & Chen sp. nov.; China (Guizhou).
M. subinermis Lindberg, 1927; Russia; Korea; China (Gansu, Heilongjiang).
M. taibaiensis Yuan, 2002; China (Shaanxi).
M. yananensis Chou & Yuan, 1981; China (Shaanxi).
Key to species of Machaerotypus Uhler, 1896 (based on Chou & Yuan 2002)
1. Body or pronotum with obviously reddish markings ....................................................................... 2
– Body dark or brown .......................................................................................................................... 8
2. Reddish markings on pronotum trident shaped (Fig. 8A, a) ......... M. camelliae Chou & Yuan, 1981
– Reddish markings on pronotum non-trident shaped ......................................................................... 3
3. Half of suprahumeral horn reddish (Fig. 8D, d) ................ M. semirubronigris Yuan & Chou, 1992
– Suprahumeral horn entirely reddish .................................................................................................. 4
4. Posterior pronotal process with one reddish band (Fig. 8B, b) .... M. rubronigris Funkhouser, 1938
– Reddish markings on posterior pronotal process more extensive, Y-shaped .................................... 5
5. Anterior parts of reddish Y-shaped pronotal marking enlarged (Fig. 8G, g) ...................................... ................................................................................................................ M. mali Chou & Yuan, 1981
– Anterior parts of reddish Y-shaped marking narrow ......................................................................... 6
6. Posterior pronotal process almost entirely reddish (Fig. 8C, c) ..... M. rubromarginatus Kato, 1940
– Center of posterior pronotal process in dorsal view brown or black ................................................ 7
7. Forewing with a hyaline transverse band near center ............................... M. taibaiensis Yuan, 2002
– Forewing brown and slightly shallow edge ................................ M. yananensis Chou & Yuan, 1981
8. Forewing veins with small nodules .................................................................................................. 9
– Forewing veins without nodules ..................................................................................................... 10
9. Posterior pronotal process flat (Fig. 8J) ............................................. M. subinermis Lindberg, 1927
– Posterior pronotal process with dorsal margin arched (Fig. 8M) ...... M. nodulus Li & Chen sp. nov.
10. The apex of posterior pronotal process curved (Fig. 8L) .......................... M. arisanus (Kato, 1928)
– The apex of posterior pronotal process flat ......................................................................................11
11. Posterior pronotal process with two depressions (Fig. 8I) .......................... M. ishiharai Kato, 1940
– Posterior pronotal process with one depression .............................................................................. 12
12. Posterior pronotal process flat or slightly expanded (Fig. 8K) ............ M. sibiricus (Lethierry, 1876)
– Posterior pronotal process obviously expanded in lateral view (Fig. 8H) .......................................... ........................................................................................................ M. stigmosus Li & Chen sp. nov.
description: Published as part of Li, Feng-E., Yang, Lin, Long, Jian-Kun, Chang, Zhi-Min & Chen, Xiang-Sheng, 2022, Two new species of the treehopper genus Machaerotypus Uhler, 1896 from China (Hemiptera: Membracidae: Centrotinae), pp. 64-79 in European Journal of Taxonomy 826 (1) on pages 65-67, DOI: 10.5852/ejt.2022.826.1835, http://zenodo.org/record/6761661