Corydendrium parasiticum

<p>Stems consisting of a bundle of fascicled, irregularly branched hydrocauli; branching of three orders more or less in same plane by forking of perisarc tubes. Adnate tubes proximally narrow, free part diverging at an acute angle to stem; perisarc thick, wrinkled, corrugated to almost smooth.</p><p> Hydranths with approximately 20 long tentacles scattered over body.</p> <p>Cnidome:</p> <p>i) Microbasic euryteles in tentacles, capsule 9.5-10.5 x 4.5-6.5 µm, shaft 7 µm, tubule proximally thick with 4 spirals of fine spines; few discharged, not common.</p> <p>ii) ?Desmonemes, capsule ovoid, 5 x 4.5 µm; rare, none discharged, not common.</p> <p>Colour: Pale honey brown.</p>

Sumber: Cnidaria

<p>Widely distributed in temperate and tropical seas.</p>

Sumber: Cnidaria

<p>Subtidal, epizoic on polychaete worm tubes and other invertebrate substrates. </p>

Sumber: Cnidaria

Description (based on our own observations; Schuchert 2004): Hydroid. Colonies erect, up to 5 cm high; hydrocauli polysiphonic, much branched; perisarc firm, moderately thick, smooth or with some wrinkles and often encrusted with detritus and silt, becoming thin at hydranth base and ending below tentacles; hydrocladia branching irregularly in one or more planes, adnate to main axis basally but gradually curving outwards and becoming free distally, secondary branches occur in the same way; hydranths elongate, constricted basally (below perisarcal tube); hypostome conical, prominent; with 40 or more filiform tentacles, scattered throughout the body of the hydranth. Gonophores as long, slender cylinders wholly contained within perisarcal tube, arising from coenosarc and lying parallel to it, without spadix; females with about 13 eggs, extruded from perisarc when mature but remaining attached to the end of tube until developed into planulae. Cnidome. Desmonemes and microbasic euryteles. Habitat type. Rocky cliffs, concretions (Schuchert 2004). Substrate. Grows most often on rock. Seasonality. In the Tyrrhenian Sea (Lo Bianco 1909) from June to October; summer in the Ligurian Sea (Puce et al. 2009); in Salento waters (De Vito 2006; this study), present in February, July, November. Reproductive period. In the Tyrrhenian Sea in August – September (Lo Bianco 1909), and June – August (Neppi 1921).