Salacia macer Vervoort & Watson, 2003

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 : 21

Salacia macer Vervoort & Watson, 2003

Fig. 7 B–G

Salacia macer Vervoort & Watson, 2003: 154 , figs 34g, 35a.

Material examined

BATHUS 3: Stn. DW809, single sterile stem, 2.4 cm high, partly damaged (several cladia missing) (MNHN-IK-2012-16551).

NORFOLK 1: Stn. DW1659, four stems 3–4.5 cm high, two of which bear female gonothecae (MNHN- IK-2012-16552).

Remarks

The slender habit of these colonies, their regularly-pinnate branching pattern and their division into internodes, each of which bears a single pair of strictly opposite hydrothecae, are diagnostic ( Vervoort & Watson 2003). The gonothecae, not previously described, are present in this material, and are female. They are borne on either the stem or cladia, and are arranged perpendicularly from below one hydrotheca of a pair. Urn-shaped, smooth-walled, 3280–3565 µm long and 1110–1170 µm wide, tapering basally into a short pedicel; distally truncate, aperture circular, 590–615 µm wide, borne on a short, 565–575 µm wide neck region. Possibly up to 100 oocytes per gonotheca, though their number is difficult to ascertain.

Geographical distribution

Norfolk Ridge ( Vervoort & Watson 2003; present study).

Figures

Fig. 7. (continued on next page) ― A. Idiellana pristis (Lamouroux, 1816) (TAIWAN 1, Stn. DW1), stem internode and basal part of cladium. ― B–G. Salacia macer Vervoort & Watson, 2003 (NORFOLK 1, Stn. DW1659). B. Stem internode and basal part of cladium. C. Hydrothecae, frontal view. D. Same, dorsal view. E. Hydrothecal aperture, frontal view. F. Hydrothecal aperture, oblique view, showing