鲤科盘鮈属（discogobio）鱼类的系统发育与地理分布格局分析

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1、insertionscaleless(vs．scaledinD．10ngibarbatus,D．macrophysallidos,D．bismargaritus。D．1aticeps．D，multilineatusandD．tetrabarbatusornakedonlyrestrictedtobellyinD．yunnanensis)；snoutrounded,notprojected(vs．slightlypointed．projectedinnbrachyphysallidos)；prepectorallength16．3-18．3％ofSL(vs．19．

2、1—22．OiIlD．brachyphysallidos)；interorbitalwidth52．5-60．9％ofHL(vs．44．％50．0inD．brachyphysallidos)；HL17．5—20．6％ofSL(vs．20．8-22．8iIlD．brachyphysaHidosor20．6-24．4inDpropeanal&ILsp)；headdepth13．2·14．2％ofSL(vs．14．4-16．6inD．propeanalisn．sp)；armstoanal-finorigindistance25％posteriorendofpelvic

3、-fmbasetoanal—finorigindistance(vs．morethan25in12．brachyphysalHdosorlessthan25innpropeanalisn．sp)．DiscogobiopropeanaliscanbedistinguishedfromallotherspeciesofDiscogobiocongenersbythefollowingcharacters：oralsuckingdisclargewithitsposterioredgebeyondverticalofanteriormarginofeye(vs．sma

4、ll、】vitIlitsposteriormarginnotreachingverticalofanteriormarginofeyeinD．10ngibarbatus．D．macrophysallidos,D．po&lepisandD．poneventralisn．sp)；snout谢thsmalltubercles(VS．谢mapairoflargetuberclesinD．bismargarRus,D．1aticeps,D．tetrabarbatusandD．multilineatus)；bodydepthmorethan17．2％ofSL(vs．1ess

5、than16．7inD．elongatus)；mid-ventralregionanteriortOpelvic—finscaleless(VS．scaledinD．10ngibarbatus,D_macrophysallidos,D．bismargaritus，D．1aticeps．D．multilineatusandD．tetrabarbatusornakedonlyrestrictedtobellyinD．yunnanens妇)；centralfleshlypadofdiscnearlyoblong(vs．centralfreshlypadofdiscne

6、arlysquareinDbrachyphysallidos)；interorbilalwidthbeyondhalfofHL(vs．1essthanhalfofHLinD．brachyphysallidos)；pelvic·finbeyondanal-finoriginfVS．notreachinginD．brachyphysallidos)；antisclosertoanal—finorie如．antistOanal—finorigindistancelessthan25％posteriorendofpelvic—finbasetoanal-finorigi

7、ndistance(VS．morethan25inDbrachyphysallidosorequalto25inD_antethoracalis)；HL20．6—24．4％ofSL(vs．17．5-20．6inDantethoracalis)；headdepth14．4—16．6％ofSL(VS．13．2—14．2inD．antethoracalis)．DiscogobioponeventraliscanbedistinguishedfromallotherspeciesofDiscogobiocongenersbythefollowingcharacters：

8、oralsuckingd