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Campylacantha cladophora Jørgensen, 1905

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Campylacantha cladophora:
The sagittal, basal spine is best developed, very strong, long, strongly bent, gradually narrowing off into a long fine point, like all the strong main spines and branches three-edged. One edge is dorsal, the others lateral. On these three edges, there are strong, expanded, narrow pointed branches, several in a row along the same edge, rather scattered and not clearly forming verticils when compared to the branches on the other edges. The branches become short towards the end of the main spines. The larger branches are in their turn furnished with similar squarrose branches.

The basal, lateral spines are also strongly developed, although not quite so much as the sagittal, dorsal one, in other respects corresponding precisely in form and arrangement of branches.

The apical spine is much less developed, having only a verticil of three branches on the corresponding place to the verticil of Plagiacantha, outside this being thin and unbranched. The ventral,

The vertical, sagittal spine is thin and unbranched, almost straight, pointing obliquely downwards between the lateral spines and being somewhat shorter than these.

In addition, in well developed forms, there appears to be two strong, lateral arched branches extending form the basal, dorsal spine at the base of the apical spine. These arched branches from a pair of secondary, lateral spines, L(r) and L(l), in form and arrangement of branches corresponding to the primary, lateral spines, only less developed. In those individuals where a smaller number of secondary spines were developed, they were not visible. But it must be remarked that the species is very brittle, so that the branches are easily broken off.

This species is especially interesting, as it seems to show the evolution of the ring species. Cfr. above and under the following species.

Rare, always in small numbers, only in deeper water samples. Seems to be boreal oceanic.

Distribution: Otherwise only observed on the west coast of Norway, Oster Fiord, very scarse, in deep water.
Jørgensen 1905


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