Symplectoscyphus effusus 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 : 41

Symplectoscyphus effusus Vervoort, 1993

Fig. 10 F–H; Table 7

Symplectoscyphus effusus Vervoort, 1993: 253 , figs 59, 60a–e.

Material examined

NORFOLK 1: Stn. DW1712, small colony composed of several stems up to 11 mm high, mostly fertile (female), on worm tube covered by sand grains (MNHN-IK-2012-16593).

Remarks

The long, tubular, upwardly-curved hydrothecae, and the transversely ribbed gonothecae with frilled margin, characteristically curving downwards, are diagnostic ( Vervoort 1993). In addition, the comparative measurements of this material and of the holotype (see Table 7) leave no doubt about their conspecificity. The gonothecae in the specimen examined have 4–5 prominent ribs, and these are definitely transversely and not spirally arranged, as stated by Vervoort. Two large oocytes or planulae occur in each gonotheca.

Geographical distribution

New Caledonia ( Vervoort 1993), Norfolk Ridge (present material).