01211nas a2200157   4500008004500000020001400045245011500059210006900174260001500243300000900258490000700267520059500274653003100869100002200900856013100922       2008                        Engldsh    a1326-675600aMycangia of the ambrosia beetle, Austroplatypus incompertus (Schedl) (Coleoptera: Curculionidae: Platypodinae)0 aMycangia of the ambrosia beetle Austroplatypus incompertus Sched  c14 January  a9-120 v473 aAmbrosia beetles have an obligate relationship with the ambrosia fungi that they feed on. This requires that the beetles have means to transport those fungi when they colonise new hosts. Some ambrosia beetles have special structures called mycangia to transport fungi in. This paper describes the mycangia of the ambrosia beetle Austroplatypus incompertus and illustrates how the mycangical hairs are probably used by the beetle to acquire fungal spores for transport. The mycangia and probable method of fungal acquisition of this species are compared with those of other ambrosia beetles.10aAustroplatypus incompertus1 aKent, Deborah, S.  uhttps://weevil.myspecies.info/mycangia-ambrosia-beetle-austroplatypus-incompertus-schedl-coleoptera-curculionidae-platypodinae02698nas a2200181   4500008004100000020001400041245020100055210006900256260001000325300001200335490000700347520194000354653002402294100002902318700001902347700001602366856013402382       2011                        eng d  a1326-675600aBiology and preliminary host range of Hydrotimetes natans Kolbe (Coleoptera: Curculionidae), a natural enemy candidate for biological control of Cabomba caroliniana Gray (Cabombaceae) in Australia0 aBiology and preliminary host range of Hydrotimetes natans Kolbe   c5 May  a200-2060 v503 aCabomba caroliniana, otherwise known as cabomba, is a submerged, rooted macrophyte with heavily dissected leaves that produces flowers that extend above the water surface. It has been disseminated around the world by aquarium traders and enthusiasts, and has become a noxious weed in numerous countries, including Australia, where it often produces dense monospecific stands. It is considered native to southern parts of North and South America, and is a common plant in floodplain streams and lakes in north-east Argentina. Because of the lack of alternative control methods, a search for biological control agents was initiated in 2003. The most promising natural enemy found during surveys of C. caroliniana in Argentina was the aquatic weevil Hydrotimetes natans. The entire life cycle is completed on the plant, primarily underwater, except when the adults climb onto emergent flowers to mate. Larvae mine the stems, pupal cases are constructed in the leaf axils where the petiole joins the stem, and adults feed on the leaves and the stems, primarily at the growing tips. Field surveys of C. caroliniana and other submerged plant species, as well as results from preliminary laboratory host range trials suggest that the weevil is specific to cabomba. Adults were found only on other plant species when intertwined with C. caroliniana in the field and did not move onto other plant species in aquaria trials. The distribution of the larvae in the field was studied in relation to depth and plant size. No preferences for stem width or plant length were found, although a significant portion of the larval mines were located near the root crown of the plant. This information on the host specificity and biology of H. natans in its native range may guide researchers studying the laboratory fundamental host range and determining the potential effectiveness of the weevil for biological control of cabomba in its introduced range.10aHydrotimetes natans1 aCabrera-Walsh, Guillermo1 aSchooler, Shon1 aJulien, Mic  uhttps://weevil.myspecies.info/biology-and-preliminary-host-range-hydrotimetes-natans-kolbe-coleoptera-curculionidae-natural-enemy