| 词条 | Compsodrillia alcestis |
| 释义 |
| taxon =Compsodrillia alcestis | image = Compsodrillia alcestis 001.jpg | image_caption = Original image of a shell of Compsodrillia alcestis | authority = (Dall, 1919) | synonyms_ref = [1] | synonyms =
| display_parents = 3 }}Compsodrillia alcestis is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.[1] DescriptionThe length of the shell attains 43.5 mm, its diameter 15.3 mm. (Original description) The slender shell is acute and pale yellowish brown. It contains (the protoconch lost), about ten whorls. The suture is strongly appressed with a prominent cord (afterwards broadening into a band) in front of it. The siphonal fasciole is constricted; with only arcuate striation. The sculpture on the early whorls consists of two or three strong cords, swollen where they override the ribs, these are prominent on the periphery. On the later whorls the peripheral cord becomes an undulated keel and the interspaces are closely spirally striate. On the body whorl in front of the keel are about a dozen major threads with wide spirally striate interspaces. The axial sculpture of (on the body whorl seven) peripheral waves, rather than ribs, overridden by the spirals, the incremental lines inconspicuous. The aperture is narrow. The anal sulcus is slightly removed from the suture, distinct, with a small subsutural callus . The outer lip is moderately produced, sharp edged, slightly crenulate by the spiral sculpture, smooth within. The inner lip shows a moderate layer of callus, with slightly raised outer edge which is continued over the columella and on the siphonal canal is separated from the feeble siphonal fasciole by a narrow chin. The siphonal canal is short, wide and slightly recurved.[2] DistributionThis marine species occurs from the Gulf of California to Colombia References1. ^1 {{WRMS species|433379|Compsodrillia alcestis (Dall, 1919)||5 April 2010}} 2. ^Dall (1919) Descriptions of new species of Mollusca from the North Pacific Ocean; Proceedings of the U.S. National Museum, vol. 56 (1920) {{PD-notice}} External links
2 : Compsodrillia|Gastropods described in 1919 |
| 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。