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Photogallery » Hydrozoa (hydroids)
Sminthea arctica type specimen after Hartlaub (1909)
Sminthea arctica type specimen after Hartlaub (1909)
Description View of bell margin, sp -- exumbrellar clasps, rc' -- circular canal, rc -- radial canal, ga -- mesogloea, go -- gonads, t -- tentacle, v -- velum

Diagnosis (translated and simplified after Hartlaub, 1909; type specimen) Bell 5 mm diameter, bulbous; mesogloea very transparent, fragile but relatively thick. The manubrium about half the height of the subumbrella. Eight radial canals, narrow, carrying the gonads, the latter relatively small, narrow, elongated, along proximal ¾ of radial canals. Eight tentacle bulbs and tentacles. Between each successive pairs of tentacles four meridianal, parallel ridges clasping bell margin and exumbrella up to the height of the begin of the gonads. Velar opening about as wide as distance of two tentacles.
Author Hartlaub, Clemenz ·  JPG file - 113.43 kB - 1 097 x 742 pixelsmore
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added on 2024-05-22281 viewsWoRMS taxaScan of drawing Trachynema arctica Hartlaub, 1909 accepted as Sminthea arctica (Hartlaub, 1909)checked Schuchert, Peter 2024-05-22 Download full sizeDownload full size Creative Commons License This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License
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