Sertularella cf. anguina Vervoort, 1993

Galea, Horia R., 2016, Notes on some sertulariid hydroids (Cnidaria: Hydrozoa) from the tropical western Pacific, with descriptions of nine new species, European Journal of Taxonomy 218, pp. 1-52 : 32

Sertularella cf. anguina Vervoort, 1993

Fig. 9A; Table 5

Sertularella anguina Vervoort, 1993: 198 , figs 40b–d, 41a–b.

Material examined

NORFOLK 1: Stn. DW1722, a sterile, unbranched stem, 3 cm high (MNHN-IK-2012-16579).

Remarks

This lightly fascicled stem (only basally), divided into moderately long, slender, geniculate internodes, each carrying distally an exceedingly long, slender hydrotheca with tapering walls and five internal, submarginal cusps (two latero-adaxial, one abaxial, and two latero-abaxial), fits the diagnosis of S. anguina given by Vervoort (1993). This author gave no precise information on the exact number of internal projections of the perisarc, but assumed that four may have been present in his material, possibly two latero-adaxial and two latero-abaxial. The fifth, strictly abaxial cusp observed in the present material is only visible when the hydrothecal apertures are seen frontally, but not laterally. Although the measurements between the material in hand and the holotype appear similar ( Table 5), certain differences (as the width of the hydrotheca) may be attributed to the fact that the former was measured in water, while the latter is a microslide preparation that suffered a certain degree of shrinkage.

Geographical distribution

New Caledonia ( Vervoort 1993) and Norfolk ridge (present study).