First formal record of the feeding habits of Saileriolidae (Hemiptera, Heteroptera, Pentatomomorpha, Pentatomoidea), with redescription of Bannacoris hyalinus (Schaefer & Ashlock, 1970), comb. nov. endemic to Vietnam

In the present study, the rare true bug <i>Bannacorishyalinus</i> (Schaefer & Ashlock, 1970), <b>comb. nov.</b> (Hemiptera, Heteroptera, Pentatomomorpha, Pentatomoidea, Saileriolidae), which is endemic to Vietnam, is redescribed and transferred from the genus <i>Saileriola</i> China & Slater, 1956 to the genus <i>Bannacoris</i> Hsiao, 1964 based on morphological characteristics. Adults and nymphs of this species congregate in groups of several individuals and suck sap from the abaxial side of the leaves of <i>Litsea</i> sp. (Lauraceae). They cause visible feeding damage on the adaxial side of <i>Litsea</i> leaves, similar to that caused by members of the heteropteran family Tingidae Laporte, 1832 (Cimicomorpha, Miroidea). The new knowledge of <i>B.hyalinus</i> <b>comb. nov.</b> also represents the first formal record of the feeding habits of Saileriolidae China & Slater, 1956. An identification key to all four species of this family is provided.