00720nas a2200193   4500008004400000020001400044245011800058210006900176260001000245300000900255490000700264653002500271100001900296700002000315700002000335700002000355700001700375856013400392       2008                        Koredn    a1225-017100aSeasonal occurrence of the larvae and adults of chestnut weevil, Curculio sikkimensis (Coleoptera: Curculionidae)0 aSeasonal occurrence of the larvae and adults of chestnut weevil   cMarch  a9-150 v4710aCurculio sikkimensis1 aKim, Young-Jae1 aYoon, Changmann1 aShin, Sang-Chul1 aChoi, Kwang-Sik1 aKim, Gil-Hah  uhttps://weevil.myspecies.info/seasonal-occurrence-larvae-and-adults-chestnut-weevil-curculio-sikkimensis-coleoptera-curculionidae02282nas a2200193   4500008004100000020001400041245011300055210006900168260000800237300001200245490000700257520159200264653002501856100001801881700001701899700002201916700001801938856013201956       2010                        eng d  a0022-191000aThermal response and reversibility of prolonged larval diapause in the chestnut weevil, Curculio sikkimensis0 aThermal response and reversibility of prolonged larval diapause   cJun  a616-6210 v563 aCurculio sikkimensis undergoes prolonged larval diapause that is terminated by chilling and warming cycles. To examine the effects of warming temperatures and their duration on diapause termination, we exposed diapause larvae that had not been reactivated after chilling at 5[degree]C to 20 or 25[degree]C and chilled them again before incubation at 20[degree]C. With increasing warming duration at 20[degree]C, diapause termination after chilling increased and shorter chilling durations became effective. In contrast, few or no larvae warmed at 25[degree]C terminated diapause after chilling, irrespective of the warming duration. To investigate the effect of warming temperature on diapause intensity, larvae with diapause weakened by initial incubation at 20[degree]C after the first chilling were subsequently incubated at 15, 20, or 25[degree]C, then chilled at 5[degree]C before incubation at 20[degree]C. Diapause termination increased significantly after the larvae were treated at 15 or 20[degree]C but decreased significantly after they were treated at 25[degree]C. The intensification of prolonged diapause at 25[degree]C was reversed when the larvae were transferred to 20[degree]C. Diapause intensity in C. sikkimensis therefore decreases at 20[degree]C, increases at 25[degree]C, and can be reversed by alternately exposing diapause larvae to 20[degree]C and 25 [degree]C. In C. sikkimensis, prolonged diapause does not always proceed in one direction, and its intensity fluctuates in response to ambient temperature conditions. (C) 2009 Elsevier Ltd. All rights reserved.10aCurculio sikkimensis1 aHigaki, Morio1 aIhara, Fumio1 aToyama, Masatoshi1 aMishiro, Koji  uhttps://weevil.myspecies.info/thermal-response-and-reversibility-prolonged-larval-diapause-chestnut-weevil-curculio-sikkimensis02662nas a2200169   4500008004100000245014900041210006900190260001100259300001000270490000600280520208200286653002502368100001602393700001702409700002202426856004402448       2009                        eng d00aPhylogeographical patterns of a generalist acorn weevil: insight into the biogeographical history of broadleaved deciduous and evergreen forests0 aPhylogeographical patterns of a generalist acorn weevil insight   c16 May  a11pp.0 v93 aBackground: Climatic changes during glacial periods have had a major influence on the recent evolutionary history of living organisms, even in temperate forests on islands, where the land was not covered with ice sheets. We investigated the phylogeographical patterns of the weevil Curculio sikkimensis (Curculionidae), a generalist seed predator of Fagaceae plants living in both deciduous oak and evergreen forests of Japan. Its genetic structure was compared to that of another host-specific seed predator, C. hilgendorfi, inhabiting only evergreen forests. Results: We examined 921 bp of mitochondrial DNA for 115 individuals collected from 33 populations of C. sikkimensis from 11 plant species of three genera, Quercus, Lithocarpus, and Castanopsis. An analysis of molecular variance revealed that a large proportion (almost 50%, P < 0.001) of the total genetic variance could be explained by differences between two geographical regions, the southwestern and northeastern parts of the main islands of Japan. In contrast, no significant genetic differentiation of the weevil was observed among vegetation types of their utilized host plant species. The phylogeographical patterns of the generalist and the host-specific seed predator exhibited a congruent genetic boundary in the Chugoku-Shikoku region. Conclusion: Our results suggest that geology and historical environment have contributed to shaping the present genetic structure of C. sikkimensis. The geographical patterns of genetic differentiation in the Chugoku-Shikoku region observed in the two types of Fagaceae-associated Curculio in this study have also been observed in several plant species growing in warm and cool temperate zones of Japan. The occurrence of this common pattern suggests that deciduous oak and evergreen forests of Japan survived together, or adjacent to each other, in small refugia during glacial ages, in the southwestern and northeastern parts of the main islands, although these two types of forests are presently distributed in cool and warm temperate zones of Japan, respectively.10aCurculio sikkimensis1 aAoki, Kyoko1 aKato, Makoto1 aMurakami, Noriaki  uhttp://www.biomedcentral.com/1471-2148/01277nas a2200277   4500008004500000020001400045245010800059210006900167260000900236300001200245490000700257520034000264653002100604653003200625653002700657653002500684653001900709653002100728653002100749653002200770653002100792653002800813653002000841100002100861856011700882       1992                        Engldsh    a1225-017100aComparative morphology of the weevil larvae of the superfamily Curculionoidea in Korea (Coleoptera) (1)0 aComparative morphology of the weevil larvae of the superfamily C  cJune  a153-1690 v313 aThis study was made to describe the morphological features of larvae of Pissodes nitidus, Pissodes obscurus, Shirahoshizo insidiosus, Curculio sikkimensis, Cryptorhynchus lapathi of Curculionidae and Apoderus jekeli, Byctiscus puberulus regalis, Euops splendidus, Rhynchites heros of Attelabidae and Sipalinus gigas of Rhynchophoridae.10aApoderus jekelii10aByctiscus puberulus regalis10aCryptorhynchus lapathi10aCurculio sikkimensis10aCurculionoidea10aEuops splendidus10aPissodes nitidus10aPissodes obscurus10aRhynchites heros10aShirahoshizo insidiosus10aSipalinus gigas1 aYoung, Lee, Chan  uhttps://weevil.myspecies.info/comparative-morphology-weevil-larvae-superfamily-curculionoidea-korea-coleoptera-1