Hebella

Galea, Horia R., 2013, New additions to the shallow-water hydroids (Cnidaria: Hydrozoa) of the French Lesser Antilles: Martinique, Zootaxa 3686 (1), pp. 1-50 : 16

Hebella sp. 4

( Fig. 4 C, J)

Material examined. Stn. 7, 23.i.2012, 6 m, M012: sterile colony growing over varied debris fixed on a portion of fishing wire.

Remarks. Hydrorhiza creeping, giving rise to short, smooth pedicels, each carrying a 520–730 µm long and 310–365 µm wide hydrotheca; margin slightly flaring, 360–400 µm wide at aperture. The cnidome comprises four types of capsules: 1) small, ovoid microbasic heteronemes, ca. 5.0×2.6 µm, of rare occurrence in the coenosarc; 2) fusiform microbasic mastigophores, (6.1–6.9)×2.1 µm, abundant in the tentacles and the coenosarc; 3) tubular microbasic mastigophores with a rather prominent, lateral "beak" at insertion of the shaft, ca. 6.6×2.1 µm, rarely occurring in the coenosarc; 4) large, elongate-ovoid microbasic heteronemes, (17.8–18.6)×(5.3–5.8) µm, abundant in the hydrorhiza.

Geographical distribution. Only known from Martinique.

Figures

FIGURE 4. A: Hebella sp. 2 ― hydrothecae. B: Hebella sp. 3 ― hydrothecae. C: Hebella sp. 4 ― hydrothecae. D – J: Comparison of the cnidomes of Anthohebella communis (Calder, 1991) (D), Hebella dyssymetra Billard, 1933 (E), Hebella scandens (Bale, 1888) (F), Hebella sp. 1 (G), Hebella sp. 2 (H), Hebella sp. 3 (I), Hebella sp. 4 (J). K – Q: Halecium dichotomum Allman, 1888 ― various stems (K); male (L, M) and female (N, P) gonothecae; aperture of a female gonotheca in frontal view, showing twin hydrotheca (O); cnidome (Q). Scale bars: 10 µm (D – J, Q), 300 µm (K – P), 500 µm (C), 1 mm (A, B).