Geminella ceramensis ( Billard, 1925 a)

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 : 7

Geminella ceramensis ( Billard, 1925 a)

Fig. 1P

Sertularella ceramensis Billard, 1925 a: 649 .

Geminella ceramensis – Schuchert 2003: 174, fig. 31.

Material examined

MUSORSTOM 8: Stn. CP1084, small, sterile colony, less than 1 cm high, with tangled stems fixed on calcareous substrate (MNHN-IK-2012-16519); Stn. CP1131, two sterile stems 0.5 cm high, detached from substrate (MNHN-IK-2012-16520).

Remarks

For a redescription of this distinctive species, see Schuchert (2003), who also provided a synonymy.

Geographical distribution

Indonesia, Philippines, New Caledonia ( Schuchert 2003), and Vanuatu (present study).

Figures

Fig. 1. ― A–B. Caminothujaria molukkana von Campenhausen, 1896 (BORDAU 2, Stn. CP1582). A. Fragment of internode with verticil of hydrothecae. B. Gonotheca. ― C–J. Diphasia cristata Billard, 1920 (BORDAU 1, Stn. CP1448). C. Pair of hydrothecae, frontal view. D. Same, dorsal view. E. Cross section through basal part of hydrothecal pair, showing perisarcal crests. F. Female gonotheca. G. Same, apical view. H. Same, cross section. I. Male gonotheca. J. Same, apical view. ― K. Diphasia orientalis Billard, 1920 (MUSORSTOM 3, Stn. DR117), internode with pair of hydrothecae. ― L–O. Dynamena heterodonta (Jarvis, 1922) (MUSORSTOM 9). L. Pair of hydrothecae in material from Stn. DW1204. M. Same sample, hydrothecal aperture, showing internal, submarginal cusps. N–O. Isolated (N) or stacked (O) pairs of hydrothecae in material from Stn. CP1265. ― P. Geminella ceramensis Billard, 1925a (MUSORSTOM 8, Stn. CP1084), internode with pair of hydrothecae. Scale bars: A–D, K–L, N–P = 500 µm; E = 400 µm; F–J = 1 mm; M = 100 µm.