2011年3月9日 星期三

Salmaciella dussumieri 31.12mm

Phylum Echinodermata 棘皮動物門


Class Echinoidea 海膽綱


Family Temnopleuridae 刻肋海膽科


Scientific name Salmaciella dussumieri


Chinese name


Author ( Agassiz , 1847)


Size 31.12mm


Description taken with tangle net in Oslob, Cebu , Philippines .


Reference http://www.nhm.ac.uk/research-curation/research/projects/echinoid-directory/taxa/taxon.jsp?id=1329


 


並請參考自戀兄已貼上的文章


Testhttp://tw.myblog.yahoo.com/chen048940-5952/article?mid=3826&prev=3827&next=3816


Test with spine http://tw.myblog.yahoo.com/chen048940-5952/article?mid=3829&prev=3830&next=3828&l=d&fid=64


 


 


 



  • Test depressed and low conical in profile with flat oral surface and deeply sunken peristome.




  • Distinct naked interradial zone adapically.


  • Small pits at all interradial and perradial suture triple points; horizontal sutures also slightly incised adapically.




  • Peristome small and deeply invaginated, with feeble buccal notches.





  • Test depressed and low conical in profile with flat oral surface and deeply sunken peristome.








  • Apical disc dicyclic or hemicyclic (ocular I may be insert), with distinct ring of tubercles on genital plates surrounding periproct. Periproct opening relatively large and circular. Suranal plate distinct in juveniles but not adults.





  • Interambulacral plates elongate with row of 3 or 4 subequal tubercles on subambital plates. Above the ambitus there is only a single primary tubercle to each plate. Aboral plates rather naked especially adapically.


  • Primary tubercles imperforate and strongly crenulate.




  • Ambulacral plating trigeminate with compounding in echinid style. Pore-pairs offset forming a single broad adradial band.


  • One primary tubercle to each ambulacral plate adorally;at the ambitus and subambitally these tubercles alternately offset so as to form a double column of primary tubercles. Above the ambitus primary tubercle on every second compound plate only.



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