| 词条 | Crassispira abdera |
| 释义 |
| taxon =Crassispira abdera | image = Crassispira abdera 001.jpg | image_caption = Original image of a shell of Crassispira abdera | authority = (Dall, 1919) | synonyms_ref = [1] | synonyms =
| display_parents = 3 }}Crassispira abdera is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae.[1] DescriptionThe length of the shell attains 15 mm, its diameter 6 mm. (Original description) The small shell is acute and thin. It has a dull waxen color with a darker blotch behind the aperture and a dark brown protoconch consisting of a 1½ smooth and polished whorls. The nine subsequent whorls show a spiral sculpture of obscure fine threads. On the body whorl in addition there is a more prominent duplex thread in front of the suture On the base are four other widely separated threads only prominent as nodules at their intersection with the line of the ribs. There are six or more finer threads on the siphonal canal. The axial sculpture consists of (on the body whorl 7 or 8) ribs which appear at the periphery as conspicuous nodules and become obsolete on the base except at the intersections above mentioned. There are also fine, sharp, close, arcuate incremental lines on the anal fasciole. The peripheral nodules are more riblike and numerous on the earlier part of the spire. The aperture is short and rather wide. The anal sulcus is deep, oval and almost tubular. The outer lip is moderately thickened,sharp-edged, smooth inside, with a prominent knob behind it. The inner lip smooth with a rather thick layer of enamel continued down the columella with a raised edge and a chink behind it. The siphonal canal is short and wide, hardly differentiated, with an inconspicuous siphonal fasciole.[2] DistributionThis marine species occurs in the Pacific Ocean off Panama Bay to Ecuador References1. ^1 {{WRMS species|432653|Crassispira abdera (Dall, 1919)||4 April 2010}} 2. ^[https://archive.org/details/proceedingsofuni561920unit 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}}] (described as Elaeocyma abdera) External links
2 : Crassispira|Gastropods described in 1919 |
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