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・ Clavatula bimarginata
・ Clavatula caerulea
・ Clavatula christianae
・ Clavatula colini
・ Clavatula congoensis
・ Clavatula coronata
・ Clavatula cossignanii
・ Clavatula decorata
・ Clavatula delphinae
・ Clavatula diadema
・ Clavatula filograna
・ Clavatula flammulata
・ Clavatula gabonensis
・ Clavatula gracilior
・ Clavatula hattenbergeri
Clavatula helena
・ Clavatula imperialis
・ Clavatula knudseni
・ Clavatula kraepelini
・ Clavatula lelieuri
・ Clavatula marmarina
・ Clavatula martensi
・ Clavatula matthiasi
・ Clavatula milleti
・ Clavatula muricata
・ Clavatula mystica
・ Clavatula nathaliae
・ Clavatula obesa
・ Clavatula perronii
・ Clavatula petzyae


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Clavatula helena : ウィキペディア英語版
Clavatula helena

''Clavatula helena'' is a species of sea snail, a marine gastropod mollusk in the family Clavatulidae.
==Description==
The size of an adult shell varies between 30 mm and 40 mm. The fusiform shell is moderately long. The ground color of the shell is yellow, superimposed with blotches and streaks of chestnut brown. The space between the sutures is brown in the anterior half. The teleoconch is flattened with a narrow keel posterior to the broad, anal sinus. The anterior half of the teleoconch has between 8 and 12 feeble axial ribs. All over the spire are very fine growth lines. The periphery of the body whorl is well rounded. The aperture is elongately oval. The thick outer lip is notched at the anal sinus. The parietal wall shows a very thick callus. The siphonal canal is very short. 〔 (Smithsonian Institution, United States National Museum, Bulletin 91 page 20 ) 〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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