FIG. 5. — A-D in New species of Hyalopomatus Marenzeller, 1878 (Annelida, Polychaeta, Serpulidae) from Recent Mediterranean deep-water coral mounds and comments on some congeners

FIG. 5. — A-D, Hyalopomatus claparedii Marenzeller, 1878; A, an entire tube growing on Isidella elongata (Esper, 1788) (sample BIOICE 2403); B, detail of an interruption characterized by a regular unbroken edge (sample BIOICE 2410); C, close-up of a tube junction showing the inner chitinous layer (sample BIOICE 2410); D, completely smooth tube with weakly evident spaced circular areas corresponding to a less dense outer covering (sample BIOICE 2410); E-H, Hyalopomatus marenzelleri Langerhans, 1884; E, tube (sample BIOICE 2364); F, distal part of the tube showing an obvious rough surface (sample BIOICE 2697); G, strong growth ridges along the tube (sample BIOICE 2697); H, close-up of a tube interruption with a regular unbroken edge still preserving the inner chitinous layer (sample BIOICE 2697). Scale bars: A, E, 1 mm; B, C, 100 μm; D, 200 μm; F, 400 μm; G, 300 μm; H, 500 μm.