| 词条 | Sarotrocercus |
| 释义 |
| fossil_range = Burgess Shale | image = Sarotrocercus.jpg | image_caption = Reconstruction of Sarotrocercus | taxon = Sarotrocercus oblita | authority = Whittington, 1981 }}Sarotrocercus is a small Cambrian organism known from Burgess shale-type localities, reaching a centimetre or two in length ({{convert|1|-|2|cm|disp=out}}).{{fotbs}} It was pelagic and swam on its back. {{gpb abundance|28|< 0.1}} It may lie in the arthropod crown group, and a recent study has revised some points of its original description.[1] MorphologyIt had a head shield followed by a body of nine segments and a caudal tip featuring a series of spines on the end. A pair of big eyes at the end of stalks emerged from the front of the shield. The head bore a pair of sturdy appendages that ended in a bidentate segment. Ten pairs of appendages with an elongated structure of comb-shaped, probably gill branches, are attached to the at the head segment (one pair) and the body segments (nine pairs). EcologyThis small animal was a creature that swam freely on its back, moving perhaps through movements of the gills and the action of its long tail tuft.[2] The Burgess Shale contains few swimming organisms; the submarine landslides that buried organisms mainly smothered benthic and nektobenthic organisms.[3] Organisms living in the water column above this habitat were able to escape and above the 'danger zone' and are therefore much rarer. Among these are the notable Amiskwia, Nectocaris and Anomalocaris. External links
References{{Portal|Arthropods|Palaeontology}}1. ^{{Cite journal |last1= Haug |first1= J.T. |last2= Maas |first2= A. |last3= Haug |first3= C. |last4= Waloszek |first4= D. | title= Sarotrocercus oblitus - Small arthropod with great impact on the understanding of arthropod evolution? |doi= 10.3140/bull.geosci.1283 |journal= Bulletin of Geosciences |pages= 725–7?? |year= 2011}} {{Taxonbar|from=Q3017283}}2. ^{{Cite journal |doi= 10.1098/rstb.1981.0033 |jstor= 2395674 |pages= 329–357 |title= Rare Arthropods from the Burgess Shale, Middle Cambrian, British Columbia |journal=Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences |volume=292 |issue= 1060 |publisher= The Royal Society |year=1981 |last1= Whittington |first1= H.B. |bibcode= 1981RSPTB.292..329W }} 3. ^{{Cite journal |first1= S.E. |first2=J. |first3= D. |title= Sedimentation of the Phyllopod Bed within the Cambrian Burgess Shale Formation of British Columbia |last1=Gabbott |journal= Journal of the Geological Society |volume= 165 |pages= 307 |year= 2008 |doi= 10.1144/0016-76492007-023 |last2= Zalasiewicz |last3= Collins |bibcode= 2008JGSoc.165..307G }} 3 : Cambrian arthropods|Burgess Shale fossils|Monotypic arthropod genera |
| 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。