| 词条 | Emuella |
| 释义 |
| fossil_range = {{Geological range|517}} late Botomian | name = Emuella | image = EmuellaPolymera.jpg | image_width = 240px | image_caption = Emuella polymera of the Emuella genus; Lower Cambrian Emu Shale, Kangaroo Island, South Australia (courtesy of Dave Simpson) | regnum = Animalia | phylum = Arthropoda | classis = Trilobita | ordo = Redlichiida | subordo = Redlichiina | superfamilia = Emuelloidea | familia = Emuellidae | genus = Emuella | genus_authority = Pocock, 1970 | subdivision_ranks = Species | subdivision =
}}Emuella is a genus of trilobites of the family Emuellidae. Its fossils have been found in South Australia. It can be recognised by touching glabella and frontal border, and the sub-pentagonal head, as compared to, a short field between the front of the axis in the head or glabella and the border ridge, and a semi-circular headsheald in the sister-genus Balcoracania. Both emuellid genera share eye ridges that are positioned parallel to the frontal and lateral border of the head, prominent genal spines that are a smooth continuation of the lateral margin of the head, a prothorax of 6 segments, with the 5th and 6th merged and carrying large trailing spines. Both genera have in adulthood a highly variable but large number of segments of the opistothorax, although the largest number found in B. dailyi with 97 is much larger than in Emuella (52).[1] EtymologyThe genus name means "little emu", and refers to Emu Bay, on Kangaroo Island, one of the sites where fossils of Emuella have been collected. The species epithet polymera is derived from Greek words πολύ -poly- meaning "many"; and μέρος -meros- meaning "part", for the many segmented thorax. E. dalgarnoi is named after R.C. Dalgarno, who discovered Balcoracania dailyi in the Flinders Ranges, near Blinman, South Australia.[2] References1. ^1 2 {{cite journal|last1= Paterson|first1= J.R.|last2= Edgecombe|first2= G.D.|year= 2006|title= Journal of Paleontology|volume= 80|issue= 3|pages= 496–513|url= http://www.bioone.org/doi/full/10.1666/0022-3360%282006%2980%5B496%3ATECTFE%5D2.0.CO%3B2|doi=10.1666/0022-3360(2006)80[496:TECTFE]2.0.CO;2}} 2. ^{{cite journal|last=Pocock|first=K.J.|year=1970|title=The Emuellidae, a new family of trilobites from the Lower Cambrian of South Australia|journal=Palaeontology|volume=13|pages=522–562}} Further information{{refbegin}}
| chapter = Burgess Shale-type Localities: The global picture | author = Hagadorn, J.W. | editor = Bottjer, D.J. |editor2=W. Etter |editor3=J.W. Hagadorn |editor4=C.M. Tang | title=Exceptional Fossil Preservation -- A Unique View on the Evolution of Marine Life | publisher=Columbia University Press | year=2002 | isbn =0231102542
|author1=Greg Edgecombe |author2=the Australian Museum |lastauthoramp=yes | title=Australian Trilobites: A Species List and Bibliography | url=http://www.austmus.gov.au/palaeontology/research/trilobites03.htm? | accessdate=August 23, 2005
| author=Sam Gon III | title=A guide to the Orders of Trilobites | url=http://www.trilobites.info/index.htm | accessdate=August 23, 2005
| author=Nedin, C. | title=The Emu Bay Shale, a Lower Cambrian fossil Lagerstätte, Kangaroo Island, South Australia | journal=Memoirs of the Association of Australasian Palaeontologists | year=1995 | volume=18 | pages=31–40
|author = Simpson, Dave |title = Trilobites of South Australia |url = http://info.esc.net.au/~dasimpson/index.htm |accessdate = August 23, 2005 |deadurl = yes |archiveurl = https://web.archive.org/web/20060219192556/http://info.esc.net.au/~dasimpson/index.htm |archivedate = February 19, 2006 |df = }}{{refend}}{{Taxonbar|from=Q5374867}}{{redlichiida-stub}} 6 : Cambrian trilobites|Emuelloidea|Trilobites of Oceania|Redlichiida genera|Fossil taxa described in 1970|Emu Bay Shale |
| 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。