细角瘦虾

Leander tenuicornis  
   

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形态描述

鉴别特征:体光滑。额角长约为头胸甲的1.2~1.5倍,两性异形。雌性者侧面观 上下缘间宽展,幅广,略作椭圆形或圆形;雄性者显著较细窄;上缘10~14齿,基部2齿在头胸甲上,下缘5~7齿;触角刺与鳃甲刺等大,后者末端在头胸甲前缘。腹部第三体节后缘圆;第四、五节侧甲腹后缘尖齿状。尾节末端尖,内侧刺长,外刺很短,背面末对小刺在后部1/3处,前对小刺在中间稍前。第一触角柄伸至额角中部,基节宽,向外扩展,末缘直或凹,末端尖刺伸至或超出第二节末;柄刺stylocerite长,超过柄基节中部。第二触角鳞片宽,长约为宽的3~5倍,外缘末端尖刺伸达鳞片末。第一步足伸至触角鳞片末,指与掌等长,腕节微短于螫;第二步足超过额角末,指节与掌部约等长或指略长,腕节明显短于螯;末3对步足腕节,长节,座节无刺,掌节后缘4~7小活刺;第五步足较第三对细长。头胸甲长最大8 cm。
习性:在开阔海域攀附漂浮海藻问,在浅海附于植被。常见于除美洲太平洋以外的热带亚热带海域;文献记载太平洋最东到新西兰;但帛流群岛未见有已鉴定标本的记录。

国外分布

红海,南非至南海,日本,菲律宾,印度尼西亚,澳大利亚,新西兰,西大西洋自纽芬兰至福克兰,东大西洋自地中海至南回归线。

Hayashi K I.1999.Prawns,Shrimps and Lobsters from Japan(109),Family Palaemonidae,Subfamily Palaemoni- nae,Genera Leaander and Palaemon.1).Aquabiology,125(vol.21,no.6):522~526
一Manning,1961:531534.,fig.2d[n.h.],f
Leander Desmarest E.,1849
Anchistioides Paulson,1875:115,type species,by monotypy:Anchistioides compressus Paul— son,1875:115.
Palemoniens H.Milne Edwards,1837:339,367.
Holthuis L B.1950.The Decapoda of the Siboga Expedition Part.10.The Palaemonidae collected by the Siboga and Snellius Expeditions with remarks on other species I. Subfamily Palaemoninae.Siboga-Ex peditie,Monogr. 39a↑10↑:1~268.figs.1~52
Bruce A J.1993a.Kakaducaris glabra gen.nov.,sp.nov.,a new freshwater shrimp from the Kakadu National Park,Northern Territory,Australia,Crustacea:Decapoda:Palaemonidae with the designation of a new subfam- ily KakaducarIdinae.Hydrobiologia,268:27~44,figs.1~12 Bruce A J.1993b.Some coral feef Pontoniine shrimps from Vietnam.Asian Marine Biology,10:55~75,figs.1~6
Chace F A,Jr and Bruce A J.1993.The Caridean Shrimps(Crustacea:Decapoda)of the Albatross Philippine Expedi- tion 1907~1910,Part 6:Superfamily Palaemonoidea.Smithsonian Contributions to Zoology,543:i~vii,1~ 252,figs.1~23
Holthuis L B.1952b.A general revision of the Palaemonidae,(Crustacea Decapoda Natantia)of the Americas II.The Subfamily Palaemoninae.Occas.Pap.Allan Hancock Found.12:1~396.pls
Palaemon tenuicornis Say,1818:249.[Type locality:Banks of Newfoundland]