Eudendrium

Galea, Horia R. & Schories, Dirk, 2012, Some hydrozoans (Cnidaria) from Central Chile and the Strait of Magellan, Zootaxa 3296, pp. 19-67 : 27-28

Eudendrium sp. 2

(pl. 1C–F)

Material examined. Stn. RHO — 01.xi.2009, DS267 (20 m): profuse, though senescent colony with numerous stems up to 7 mm high, and female gonophores partly spent, partly still attached to colony; on worm tube and stems of Halecium beanii (MHNG-INVE-79604).

Description. Colony with monosiphonic, sparingly branched stems arising from creeping, branching and anastomosing stolon. Branching pattern irregular, with side branches more or less tortuous, given off in all directions. Perisarc annulated at bases of hydrocauli, branches and pedicels, occasionally elsewhere, very irregularly; horn-colored basally, becoming transparent distally. Hydranths few and possibly senescent, tentacle number around 20, though it could not be precisely ascertained. Female gonophores only present in available material, all in advanced stage of development, with clusters of up to 12 perisarc-covered capsules arranged irregularly around pedicels, perisarc of gonophore pedicel extensively wrinkled, terminal hydranth lost. Nematocysts: microbasic euryteles in two size classes:

- small [(6.8–7.3)×(3.1–3.7) µm], pyriform capsules, abundant in tentacles, hydranth body and coenosarc of stem and branches;

- large [(20.0–21.4)×(10.0–10.7) µm], bean-shaped capsules, in the hypostome, the hydranth body, also occurring in the coenosarc of stem and branches, likely absent in the gonophores.

Distribution in Chile. The present material originates from Punta de Choros.