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Geographic Distribution

Antarctic Convergence illustration Antarctic convergence

Cossura alba Hartman, 1967  Species


Original Description
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Original Description
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"Cossura alba, new species

Record: 2:3 sta. 208 (1, TYPE).

Description: A small, pale, posteriorly incomplete specimen meas­ures 6 mm long by 1.5 mm wide and consists of 23 anterior segments ; a tail end is lacking. The prostomium is triangular, longer than wide and narrowest in front ; it lacks eyes or other surface marks. The first seg­ment is a complete, smooth ring resembling the second segment but lack­ing setae. The second segment is the first with setae; it has a neuropo­dial fascicle which is smaller than those farther back. The third seg­ment is the first biramous one ; its notopodia are smaller and slenderer than those farther back.

A large, median tentacle is inserted middorsally between setigerous segments four and five, or on the sixth segment ; it is smooth and cvlin­drical.

Notosetae resemble neurosetae; they are arranged in spreading fas­cicles, in anterior and posterior rows, the posterior rows with longer and more numerous setae ; all setae are slender, limbate and smooth along the cutting edge.

Cossura alba differs from C. laeviseta Hartmann-Schroeder, 1962, in having the median tentacle inserted between setigerous segments four and five, instead of on third setiger ; eyes are absent instead of present.

Distribution: Off southwest Chile, in 957 m."

(Hartman, 1967

Geographic Distribution

Distribution: Off southwest Chile, in 957 m.


Type Status Catalog No. Date Collected Location Coordinates Depth (m) Vessel
Holotype 55541 9/11/1962 South Pacific Ocean 37.5° S , 73.9° W   Eltanin R/V

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