| 翻訳と辞書 |
| Metrioxenini ： ウィキペディア英語版 |
Metrioxenini
Metrioxenini (metrioxenines) are a tribe of belids, primitive weevils of the family Belidae, containing about 30 species. They are only found in two widely separated areas, Southeast Asia extending to Indonesia, and South Africa. In the Paleogene, they were found at least in North America and Europe also, occurring perhaps across the entire Northern Hemisphere.〔
As in other belids, their antennae are straight, not elbowed as in the true weevils (Curculionidae). They are far less characteristic than their presumed closest living relatives, the Aglycyderini. They can be recognized by the sharp-sided rostrum ("snout"). Also, their eyes are bordered by a wide and ridged groove. ''Metrioxena'' shows two sharp ribs on each elytron, which are absent in the other genera. These, by contrast, have their tarsal claws fused together at the base (they are unfused in ''Metrioxena'') and grooves on the pygidium which are absent in ''Metrioxena''.〔
==Distribution and ecology==
The type genus ''Metrioxena'' contains twelve described species apart from the fossil ones mentioned below. They are today restricted to parts Southeast Asia, extending into the Indonesian archipelago. Roughly, they occur between Thailand and the Philippines and from Malaysia to the Tanimbar Islands. They have been found on Sumatra, Java, Sulawesi and offshore Ternate but are hitherto unknown from Borneo and the Lesser Sunda Islands where they conceivably might also occur. Considering that in the Paleogene the genus (or very close relatives) were found in North America and Europe, it may well be that the present distribution is a relict of a formerly Holarctic range. The Paleogene was warmer than our time, and the climate in today's temperate latitudes was by then indeed more like that in today's Southeast Asia.〔
''Afrocorynus'' contains presently two described species, which are only known to occur in the mountains and hills that extend on the southern coast of South Africa, between Mosselbay in the west, Grahamstown in the east, and the Karoo inland. ''Hispodes'' occurs in similar habitat extending eastwards and inland, with the single described species (''H. spicatus'') found hitherto only in the Katberg region, and an undescribed species known from the Drakensberg escarpment south of Tzaneen.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Metrioxenini」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|