22x13mm

frank hu wrote: Cronia margariticola 的同種異名  但是在5100中將他獨立稱呼  所以您愛叫他甚麼都可以

這一顆螺在ANSP OBIS http://clade.ansp.org/obis/search.php/50319 將Cronia (Ergalatax) crassulnata auct 歸屬Ergalatax margariticola的Synonymy,但Hardy則將它獨立稱呼,不過在 http://www.gastropods.com/4/Shell_7144.html與http://www.gastropods.com/1/Shell_1131.html的圖又有些相似

也有將它視為亞種或另一form ,如 Cronia margariticola crassulnata 如 http://shell.kwansei.ac.jp/~shell/pic_book/data51/r005020.html

在 http://www.listserv.uga.edu/cgi-bin/wa?A2=ind0307b&L=conch-l&P=2277 Cecil Bankston 發現此Ergalatax crassulnata 與Ergalatax margariticola有差異 "They have only 6 varices,
and the inner lip and columella coloration is different from the
others. "

5100種將我po上來的視為Cronia margariticola ,不過我找不到Ergalatax crassulnata ,請frank hu兄告知它在那一頁? 謝謝!

我覺得這顆就是5100 裡的 Cronia crassulnata啦