| 翻訳と辞書 |
| Harrimania planktophilus ： ウィキペディア英語版 |
Harrimania planktophilus
''Harrimania planktophilus'' is a marine acorn worm in the family Harrimaniidae. It lives in a burrow in sediment on the sea floor. It is only known from western Canada and was first described by Cameron in 2002. The species name is from the Greek and translates as "lover of plankton".
==Description==
''H. planktophilus'' can grow to about 6cm (2.5in) long but is more typically 3.5cm. Though generally cylindrical, the body is divided into several distinct regions, having a short cream-coloured, extendible proboscis, an orange collar and a long yellow and grey trunk. The proboscis has a dorsal groove and is cone-shaped, being rather longer than it is wide. It contains a skeleton which extends into the anterior part of the trunk. Near the front of the short, wide collar is a circumbuccal groove in which the mouth is situated. Contractions of its muscular lip cause the size and shape of the mouth to vary. There is a small brown pit where the collar meets the trunk and the latter is subdivided into four parts. The long branchial region has up to 54 pairs of gill pores opening dorsally. It is followed by an esophageal region with a distinctive reddish-coloured oesophagus. Posterior to this is a dark-coloured hepatic region and a long greyish intestinal region. This is transparent and the gut is visible meandering to its termination at the anus, which is controlled by a strong sphincter. In mature individuals, the gonads are long dark masses and extend dorsally most of the way down the trunk.〔
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「Harrimania planktophilus」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.
|
|