Guide to Palearctic Flea Beetle Genera
(Coleoptera: Chrysomelidae: Alticinae)
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Trachyaphthona Heikertinger

habitus illustration of Trachyaphthona nigra Trachyaphthona nigra
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  • Trachyaphthona Heikertinger, 1924a:34 (type species Aphthona sordida Baly, 1874, Japan, by monotypy). - Heikertinger & Csiki in Junk, 1939:99. - Chûjô, 1935:357. - Ohno, 1961:73 (including Zipangia). - Gressitt & Kimoto, 1963:871. - Kimoto, 1965:403, 612. - Samuelson, 1973:15. - Konstantinov & Vandenberg, 1996:317.
  • Nesohaltica Maulik, 1929:201 (type species N. nigra Maulik, 1929, Samoa, by monotypy). - Samuelson, 1973:15 (synonymized).
  • Amydus Chen, 1935:76 (type species A. castaneus Chen, 1935, India, by monotypy). - Scherer, 1969:80 (synonymized).

Distribution: Japan, Oceania, India, Sri Lanka.

Statistics: 2 species in Palearctic, more than 40 species worldwide.

Host Plants: Paederia scandens (Kimoto, 1965).

Diagnosis: Body small, elongate-oval. Color yellow, brown or black, without metallic lustre.
Head hypognathous, convex from lateral view. Frontal ridge very narrow between antennal sockets, swollen apically, joining in a gradual curve with anterior margin of head capsule. Antennal calli raised, broadly connected, delimited from vertex by furrows, but not delimited from frons laterally. Orbital line present only on dorsal margin of eye. Clypeus long, labrum short. Antenna 11-segmented, filiform.
Pronotum more or less flat, narrowly explanate laterally, without any impressions. Procoxal cavity open behind. Intercoxal prosternal process and mesosternum wide and parallel sided.
Elytra oval, with well developed humeral calli and notable transverse impression before middle. Elytral punctures large, deep, and dense, irregularly placed. Epipleuron comparatively wide, subvertical.
Metafemur normal. Metatibia cylindrical, flat only at apex and apical 1/4. Metatibial spine very small, inserted laterally. First metatarsal segment short, slightly longer than following two segments combined.

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Generic
Key 		Generic
Index 		Morphology Host
Plants 		Overview of
Palearctic Fauna 		Literature
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