| 词条 | Bathycrinus aldrichianus |
| 释义 |
| name = Bathycrinus aldrichianus | image = | image_caption = | regnum = Animalia | phylum = Echinodermata | classis = Crinoidea | subclassis = Articulata | ordo = Comatulida | familia = Bathycrinidae | genus = Bathycrinus | species = B. aldrichianus | binomial = Bathycrinus aldrichianus | binomial_authority = Thomson, 1876 [1] | synonyms =*B. campbellianus P.H. Carpenter, 1884
| synonyms_ref = [1] }}Bathycrinus aldrichianus is a species of sea lily, a crinoid in the family Bathycrinidae. It is native to deep water in the North Atlantic Ocean.[1] It was first described by the Scottish marine zoologist Charles Wyville Thomson (who had been chief scientist on the Challenger Expedition) and named in honour of Pelham Aldrich, a British naval officer and explorer.[2] It is believed to be the crinoid living at the greatest depth.[3] DescriptionBathycrinus aldrichianus is a ten-armed sea lily, the first and second arms, the fourth and fifth, and the seventh and eighth having syzygies (being joined together at the base). The arms are connected to the base ring of the crown and consist of a series of jointed rectangular plates with ribs on the exterior surface. The stem usually has twelve or more columnals (stem portions) but sometimes has rather fewer, with a minimum of five. It is attached to the substrate by elongated, jointed cylindrical plates that spread out in a rootlike fashion. The crown is held up to {{convert|15|cm|0|abbr=on}} above the sediment.[3]DistributionRecords for this species are scattered throughout the abyssal North Atlantic from about 40°N, southward to the equator and it may perhaps exist further south than the equator; its depth range is between about {{convert|3340|and|5600|m}} or {{convert|3.3|and|5.6|km}}.[3] The temperature at these depths is close to {{convert|0|°C}}, and this species is found in areas with slight or moderate currents.[3] BehaviourBecause of the great depths at which this crinoid lives, its behaviour has been little studied. When observed from a submersible, the roots were immersed in the sediment, the lower two thirds of the stem were held vertically and the upper third curved and the arms opened to form a filtration fan held perpendicular to the substrate and often slightly reflexed. The oral disc was oriented down-current.[3] References1. ^1 2 {{cite WoRMS |author=Messing, Charles |year=2013 |title=Bathycrinus aldrichianus Thomson, 1876 |id=124169 |accessdate=2014-11-05 |}} {{Taxonbar|from=Q2376370}}2. ^{{cite web |url=http://angustrumble.blogspot.com/2008/12/christmas-island.html |title=The Tumbrel Diaries: Christmas Island |work=angustrumble.blogspot.com |accessdate=2014-11-05 }} 3. ^1 2 3 4 {{cite journal |author1=Macurda, Donald B. Jr. |author2=Meyer, David L. |year=1976 |title=The Morphology and Life Habits of the Abyssal Crinoid Bathycrinus aldrichianus Wyville Thomson, and Its Paleontological Implications |journal=Journal of Paleontology |volume=50 |issue=4 |pages=647–667 |jstor=1303662}} 3 : Comatulida|Animals described in 1876|Fauna of the Atlantic Ocean |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。