Acrorrhinium Noualhier

Yasunaga, Tomohide, Yamada, Kazutaka & Artchawakom, Taksin, 2013, New or little known taxa of the plant bug tribe Hallodapini (Hemiptera: Heteroptera: Miridae: Phylinae) from Thailand, with descriptions of three new species of the genus Acrorrhinium Noualhier, Zootaxa 3647 (3), pp. 429-442 : 430-431

Genus Acrorrhinium Noualhier

Diagnosis. Readily recognized by the following diagnostic characters: Body elongate, 3–7 mm in total length, with long antennae, labium and legs; dorsal surface as a rule matte; frons noticeably projecting anteriorly; and endosoma usually spiral and/or coiled. Detailed diagnoses are provided by Schuh (1984) and Zhang & Liu (2010).

Discussion. This distinctive genus is easily recognized by having a mesal projection on the frons. Currently 26 described species are known mainly from the Afrotropical Region. In Asia, eight species have hitherto been recorded (Schuh, 1984; Yasunaga, 2001; Zhang & Liu, 2010). However, most species appear to be rare, and biological information is still fragmentary for this unique genus.

Almost all members of Acrorrhinium are known to occur in the subtropics and tropics; only A. inexpectatum (Josifov, 1978) is restricted to temperate and cold temperate climate zones in Far Eastern Asia (Yasunaga, 2001; Zhang & Liu, 2010). Kerzhner (1988) reported that A. inexpectatum is associated with barks or branches of Quercus spp. ( Fagaceae ) and other deciduous trees, whereas both adults and nymphs of this species were confirmed to inhabit bark or trunks of a weeping willow, Salix babylonica L. ( Salicaceae ) and a Japanese cherry, Prunus yedoensis (Matsum.) A. V. Vassil (Rosaceae) , planted in some urbanized areas in Honshu, Japan (Yasunaga, 2001; Yasunaga, unpublished observation). Linnavuori (1965) cited Juniperus phoenicea L. ( Cupressaceae ) as a host plant of A. conspersum Noualhier , the type species of the genus.

In Thailand, one of the new species described below, A. tritonion , was confirmed to have been associated with a tropical broadleaf, Hibiscus tiliaceus L.