The thirty - four species of the sea urchins belong to 7 order, 17 families and 28 genera. the following is the name list, those with an asterisk are the species recorded for the first time in china. order cidaroida family cidaridae * goniocidaris biserialis ( d6derlein ) * stylocidaris bracteata ( a. agassiz ) * stylocidaris ryukyuensis shigei * stereocidaris indica philippinensis mortensen * rhopalocidaris gracilis doderlein order lepidocentroida family echinothuridae * phormosoma bursarium ( a. agassiz ) araeosoma owstoni mortensen asthenosoma ijimai yoshiwara order stirodonta family phymosomatidae glyptocidaris crenularis a. agassiz family arbaciidae * coelopleurus maculata a. agassiz et h. l. clark * coelopleurus undulatus mortensen order aulodonta family diadematidae chaetodiademajaponicum mortensen family pedinidae * caenopedina mirabilis ( d6derlein ) order camarodonta family temnopledridae temnopleurus hardwickii ( gray ) temnopleurus toreumaticus ( leske ) temnopleurus reevesii ( gray ) temnopleurus apodus ( a. agassiz et h. l. clark ) temnotrema sculptum ( a. agassiz ) temnotrema reticulatum mortensen * microcyphus olivaceus ( d6derlein ) * prionechinus forbesianus ( a. agassiz ) family strongylocentrotidae strongylocentrotus nudus ( a. agassiz ) hemicentrotus pulcherrimus ( a. agassiz ) family echinometridae anthocidaris crassispina ( a. agassiz ) order clypeasteroida family clypeasteridae clypeaster virescens doderlein family laganidae * peronellapellucida d5derlein family scutellidae * scaphechinus mirabilis a. agassiz sinaechinocyamus planus liao family fibulariidae fibularia acuta yoshiwara order spatangoida family loveniidae - lovenia triforis koehler echinocardium cordatum ( pennant ) family schizasteridae schizaster lacunosus ( linnaeus ) family brissidae * gymnopataqus magnus ( a. agassiz & h. l. clark ) family spatangidae * spatangus luetkeni a. agassiz among the species reported, the following species call for notes or simple descriptions
本文根據th . mortensen ( 1928 - 1955 )
海膽專著( amonographoftheechinoidea )中的主要分類依據,將
海膽綱分為8個目: 1 )頭帕目( cidaroidea )有齒器,圍肛部在頂系內,圍口部有步帶板和間步帶板,大棘很大,有外皮層,無球棘; 2 )鱗棘目( lepidocentroida )有齒器,圍肛部在頂系內,圍口部僅有步帶板,大棘不很大,無外皮層,有球棘; 3 )脊齒目( stirodonta )有齒器,圍肛部在頂系內,齒器的齒有脊,橈骨片在齒上方不相接,顎孔開放; 4 )管齒目( aulodonta )齒器的齒無脊,圍肛部在頂系內; 5 )拱齒目( camarodonta )有齒器,圍肛部在頂系內,齒器的齒有脊,橈骨片在齒上方相接,顎孔封閉; 6 )全雕目( holectypoida )有齒器,但不發達或完全被吸收,圍肛部在頂系外,步帶不形成瓣狀和葉
鰓; 7 ) ?形目( clypeasteroida )齒器發達,圍肛部在頂系外,步帶形成瓣狀,無葉
鰓; 8 )蝟團目( spatangoida )無齒器,圍肛部在頂系外,葉
鰓發達,步帶形成瓣狀。
01 ). poisonous metals such as cd, pb, cr and ni were mainly distributed in scale and gill. for fishes, the content of heavy metals in the edible part were far below pollution evaluation standards for marine organism and healthy standards for human consumption, which was safe to be eaten
魚類不同組織器官對各種重金屬積累能力明顯不同,有毒重金屬元素cd 、 pb 、 cr和ni主要分佈於鱗片和
鰓中,其食用部分中各重金屬含量都遠低於「
海洋生物污染評價標準」和「人體衛生消費標準」 ,具安全的食用價值。
Those needle - like choppers are better suited to fleshier forms found in the deep sea, such as squid and other sharks
和深
海里的其它鯊魚和魷魚等魚類相似,皺
鰓鯊的牙齒也像針頭一樣。
Some marine bivalves were found in the badaowan formation ( early jurassic ) with continental lacustrine sediment, which indicates that junggar basin used to be coneded with sea water in a short time or the sea water emerged the lake
摘要在陸相河湖沉積的八道灣組(早侏羅世)內,新發現一些
海相瓣
鰓類化石,表明當時準噶爾盆地在一短期內曾與
海水相通,或者
海水通過某一水系湧入該河湖區。
For the gill tissue, the best method is to dip the tissue in ringers solution for 10 minutes, then 50 minutes in 0. 04 % colchicines solution, 30 minutes in 0. 075m potassium chloride solution, fixation by carnoy ' s ; for the embryo, it is better to use 0. 02 % colchicines for 2. 5 hours and potassium chloride for 20 minutes
研究結果表明,針對
鰓絲組織,取材后,使用ringers液或消毒
海水中漂洗10分鐘;
海水配0 . 04的秋水仙素處理50分鐘; 0 . 075m氯化鉀低滲30分鐘;正常固定滴片制備的染色體形態、分散良好。
Lampetra japonica could migrate to the yellow sea region and freshwater in jiangsu province
日本七
鰓鰻可以遷移到黃
海及江蘇省淡水中。
Cold water surged over shemsen ' s gills as he sighed. only a fool refused what umberlee provided
舍姆森嘆氣的時候,冰冷的海水涌進了他的鰓里。只有傻瓜才拒絕烏姆貝爾蕾的恩賜。