| 词条 | Maxmuelleria lankesteri |
| 释义 |
| name = Maxmuelleria lankesteri | image = | image_caption = | regnum = Animalia | phylum = Annelida | classis = Polychaeta | subclassis = Echiura | familia = Bonelliidae | genus = Maxmuelleria | species = M. lankesteri | binomial = Maxmuelleria lankesteri | binomial_authority = (Herdman, 1897)[1] | synonyms = *Thalassema lankesteri Herdman, 1897 | synonyms_ref = [1] }} Maxmuelleria lankesteri is a species of spoon worm in the family Bonelliidae. It is found in the North Atlantic Ocean. It burrows into soft sediment on the seabed, mostly in deep water. DescriptionThe female Maxmuelleria lankesteri is broadly cylindrical and grows to a length of about {{convert|120|mm|in|0|abbr=on}}, and a width of {{convert|30|mm|in|0|abbr=on}}. It has a proboscis which is nearly as long as the body. The proboscis is scoop-shaped with a truncated tip, but does not divide in two parts. There are a pair of large chaetae (bristles) on the under side of the body just posterior to the proboscis and the genital groove is obscure. Both body and proboscis are green. The morphology of the male is not known.[2] Distribution and habitatMaxmuelleria lankesteri is native to the northeastern Atlantic Ocean. Its range includes the Kattegat, the Skagerrak, the western coast of Scotland and the Irish Sea. It is mainly a deep sea species, burrowing in soft sediment.[2]EcologyMaxmuelleria lankesteri makes a large semi-permanent burrow in sandy or muddy sediment. There is often a mound of sediment up to {{convert|20|cm|in|0|abbr=on}} high by the single, funnel-shaped entrance to the burrow, and there is some evidence that a second entrance exists. Immediately below the entrance is a circular constriction with smooth walls, but beyond this the tunnel becomes wider and gradually becomes more horizontal. It may descend as deep as {{convert|80|cm|in|0|abbr=on}} below the surface. Other animals are often found living symbiotically in the burrow, including polychaete worms and bivalve molluscs. Several species of goby may also live near the entrance and made their own modifications to the burrow, as also does the crustacean Jaxea nocturna.[3]References1. ^1 {{cite WoRMS |author=Tanaka, Masaatsu |year=2017 |title=Maxmuelleria lankesteri (Herdman, 1897) |id=110368 |accessdate=18 March 2019 }} 2. ^1 {{cite web |url=http://species-identification.org/species.php?species_group=macrobenthos_misc&id=23 |title=Maxmuelleria lankesteri (Herdman, 1897) |author=M.J. de Kluijver |work=Macrobenthos of the North Sea: Miscellaneous worms |publisher=Marine Species Identification Portal |accessdate=18 March 2019}} 3. ^{{cite journal |author=Nickell, L.A.; Atkinson, R.J.A.; Hughes, D.J.; Ansell, A.D.; Smith, C.J. |year=1995 |title=Burrow morphology of the echiuran worm Maxmuelleria lankesteri (Echiura: Bonelliidae), and a brief review of burrow structure and related ecology of the Echiura |journal=Journal of Natural History |volume=29 |issue=4 |pages=871-885 |doi=10.1080/00222939500770311 }} 2 : Echiurans|Animals described in 1897 |
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