日本全国に分布し日本で最も普通にみられるアザミウマの１つ。多食性で様々な植物に見られる。メスは黄色と褐色に色分けされるが、オスは一様に淡色。前翅は淡褐色に曇るが基部はやや淡い。KOH処理したプレパラート標本では前翅の褐色部はより淡くなり、基部の淡色部のコントラストは弱い。オスは前胸背楯板の中央刺毛が前縁から離れることでのみT. hawaiiensis ハナアザミウマと識別できる。海外では東洋～オーストラリアに広く分布する。

This species distributed throughout Japan and it is one of the most common species in Japan. It is polyphagous and occurs on many kinds of he plants. Female is bicoloured in yellow and brown, but male is uniformly pale. The fore wings are shaded in pale brown but slightly pale at base, and become paler at shaded area in slide-mounted specimen. In male, this species can be distinguished from T. hawaiiensis by only position of the metascutal median pair of setae, which is behind anterior margin. This species widely distributed in the Oriental region and Australia.

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  Female

  

  Female

  

  Female

  

  Female head and thorax