Halecium cymiforme Allman, 1888

Galea, Horia R., Schories, Dirk, Försterra, Günter & Häussermann, Verena, 2014, New species and new records of hydroids (Cnidaria: Hydrozoa) from Chile, Zootaxa 3852 (1), pp. 1-50 : 11

Halecium cymiforme Allman, 1888

( Fig. 1 T)

Material examined. Corral, Chaihuin/Huiro, lat. -39.95000, long. -73.61667, 09.xi.2011, 12 m, sample S11: female colony with stems up to 15 mm high, on sponge-covered hydroid (MHNG-INVE-86224); 08.x.2012, 6‒ 10 m, sample S14: male colony with stems up to 7 mm high, on worm tube (MHNG-INVE-86225).

Remarks. Only the female gonothecae were described previously ( Galea et al. 2009). A male colony occurs in the present collection. Its gonothecae arise from within the hydrothecae, and are broadly ovoid and somewhat lenticular in side view, 560–780 µm long and 425–515 µm wide, tapering basally into a short, indistinct pedicel.

Distribution in Chile. Puerto del Hambre ( Allman 1888), South of Chiloé ( Galea et al. 2009), and Corral (present study).

World records. Not known from elsewhere.

Figures

FIGURE 1. A, B: Hebella cf. scandens (Bale, 1888) — hydrotheca (A); gonotheca (B). C ‒ D: Hebella striata Allman, 1888 — hydrotheca (C); gonotheca (D). E, G, H: Phialella? falklandica Browne, 1902 — portion of erect stem (E) compared with that of P. quadrata (Forbes, 1848) (F); gonotheca seen laterally (G) and apically (H), compared with those of P. quadrata (I, stolonal; J, borne of stem). K, L: Silicularia? bilabiata (Coughtrey, 1876) — two hydrothecae (K); female gonotheca (L). M ‒ O: Silicularia rosea Meyen, 1834 — two hydrothecae (M) compared with specimens from Tristan da Cunha assigned to S. hemisphaerica (Allman, 1888) (P); female (N) and male (O) gonothecae, compared to homologous gonothecae (Q and R, respectively) from Tristan. S: Halecium corrugatissimum Trebilcock, 1828 — small stem with female gonotheca. Scale bars: 300 µm (A, B, E, F, S), 500 µm (C, D, G ‒ J), and 1 mm (K ‒ R).