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タイトル	Biological notes and distributional information on Eterozemus celtis (Lewis) (Coleoptera: Brentidae).
タイトル	エノキミツギリゾウムシ(コウチュウ目:ミツギリゾウムシ科)の生態と分布について.

書誌/出版物	Coleopterists' News 甲虫ニュース

著者	Hiraku Yoshitake 吉武　啓 Yuji Tsutsumiuchi 堤内　雄二

版		巻		号	(141)	頁	1-6

発行機関	The Japanese Society of Coleopterology
発行機関	The Japanese Society of Coleopterology

発行年	2003	発行月	3

ISBN		ISSN	0910-8785

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備考	The genus Cyphagogus Parry and some other genera of the tribe Cyphagogini, the subfamily Cyphagoginae possess highly modified bodies involved with the habit of ‘nest parasitism’, usurping nests of scolytid and platypodid ambrosia beetles to acquire breeding sites. Cyphagogini is presently composed of 69 genera. They differ in the degrees of structural modification of various body parts. Biology has never been cleared in the majority of the genera until now, though the morphological difference strongly suggests that differ also in ecological traits. Eterozemus celtis (Lewis) is one of the cyphagogine weevils with less modified body. In Kyushu, west Japan, a large number of E. celtis adults were obtained from the inside of an old stump of Celtis sinensis Persoon, which was infested by larvae of Chrysochroa fulgidissima (Schonherr) (Buprestidae). Each individual formed its pupal cell along a used tunnel of C. fulgidissima larva. Therefore, E. celtis was considered to utilize, for oviposition, larval tunnels of the buprestid with no usurpation. This habit of E. celtis differs from the known habits of Cyphagogus and allied genera in the same tribe. Eterozemus celtis adults and larvae were found also from the inside of a dead wood Malltous japonicus (Thunberg) Mueller (Argoviensis), which was heavily infested by cerambycids and other wood-borers. Moreover, two adluts were taken on a dead wood of Castanopsis cuspidata (Thunberg) Schottky var. sieboldii (Makino) Nakai. This species may feed on a variety of plant species and deposit its eggs in tunnels made by unspecific wood-borers. Further studies are needed to examine whether or not E. celtis lives also in active nests of wood-boring Coleoptera and ejects the original owners of the nests. We also provided the geographical distribution of E. celtis, based on previous records and specimens examined.

備考

The genus Cyphagogus Parry and some other genera of the tribe Cyphagogini, the subfamily Cyphagoginae possess highly modified bodies involved with the habit of ‘nest parasitism’, usurping nests of scolytid and platypodid ambrosia beetles to acquire breeding sites. Cyphagogini is presently composed of 69 genera. They differ in the degrees of structural modification of various body parts. Biology has never been cleared in the majority of the genera until now, though the morphological difference strongly suggests that differ also in ecological traits. Eterozemus celtis (Lewis) is one of the cyphagogine weevils with less modified body. In Kyushu, west Japan, a large number of E. celtis adults were obtained from the inside of an old stump of Celtis sinensis Persoon, which was infested by larvae of Chrysochroa fulgidissima (Schonherr) (Buprestidae). Each individual formed its pupal cell along a used tunnel of C. fulgidissima larva. Therefore, E. celtis was considered to utilize, for oviposition, larval tunnels of the buprestid with no usurpation. This habit of E. celtis differs from the known habits of Cyphagogus and allied genera in the same tribe. Eterozemus celtis adults and larvae were found also from the inside of a dead wood Malltous japonicus (Thunberg) Mueller (Argoviensis), which was heavily infested by cerambycids and other wood-borers. Moreover, two adluts were taken on a dead wood of Castanopsis cuspidata (Thunberg) Schottky var. sieboldii (Makino) Nakai. This species may feed on a variety of plant species and deposit its eggs in tunnels made by unspecific wood-borers. Further studies are needed to examine whether or not E. celtis lives also in active nests of wood-boring Coleoptera and ejects the original owners of the nests. We also provided the geographical distribution of E. celtis, based on previous records and specimens examined.