| 词条 | Clavatula helena |
| 释义 |
| taxon =Clavatula helena | image = | image_caption = | authority = Bartsch, 1915 | synonyms_ref = [1] | synonyms = | display_parents = 3 }}Clavatula helena is a species of sea snail, a marine gastropod mollusk in the family Clavatulidae.[1] DescriptionThe 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.[2] DistributionThis marine species occurs in Jeffrey's Bay - Tsitsikamma, South Africa References1. ^1 {{WRMS species|215594|Clavatula helena Bartsch, 1915||4 April 2010}} 2. ^[https://www.biodiversitylibrary.org/page/7688730#page/7/mode/1up Smithsonian Institution, United States National Museum, Bulletin 91 page 20]
External links
2 : Clavatula|Gastropods described in 1915 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。