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Zootaxa, Taxonomy of Serpulidae (Annelida ... - Magnolia Press

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11. Filogranella Ben-Eliahu & Dafni, 1979<br />

(Fig. 18)<br />

Type-species: Filogranella elatensis Ben-Eliahu & Dafni, 1979<br />

Number <strong>of</strong> species: 1, maybe 3<br />

Tubes white, opaque, circular in cross-section, with 5 longitudinal keels; peristomes absent. Granular overlay<br />

<strong>of</strong> the tube absent. Operculum and pseudoperculum absent (but see Remarks). Radioles arranged in semicircles,<br />

up to 9 per lobe. Inter-radiolar membrane and stylodes absent. Branchial eyes absent. Prominent<br />

prostomium with ocellar clusters. Mouth palps absent. 11–14 thoracic chaetigerous segments (Fig. 18A).<br />

Well-developed trilobed collar continuous with thoracic membranes ending in mid-thorax, around 5 th –6 th<br />

thoracic chaetiger. Tonguelets absent. Collar chaetae limbate (Fig. 18B). Apomatus chaetae present (Fig.<br />

18C). Thoracic uncini saw- to rasp-shaped with about 16 teeth in pr<strong>of</strong>ile and up to 4 teeth in a row above peg.<br />

Triangular depression absent. Abdominal chaetae flat sickle shaped with blunt teeth on the edge (Fig. 18E).<br />

Abdominal uncini rasp-shaped with > 20 teeth in pr<strong>of</strong>ile, up to 7 teeth in a row; anterior peg blunt, slightly<br />

gouged underneath (Fig. 18D). Achaetous anterior abdominal zone short. Posterior capillary chaetae present.<br />

Posterior glandular pad absent.<br />

Remarks. Filogranella forms aggregations that resemble those <strong>of</strong> Filograna, but worms and their tubes<br />

are larger. However, Filograna differs from Filogranella in having fin-and-blade collar chaetae with proximal<br />

denticulate wing well separated from the distal limbate zone, a pair <strong>of</strong> well-developed thoracic membranes<br />

with apron, and rasp-shaped thoracic uncini (Ben-Eliahu & Dafni 1979). Filogranella aggregations have been<br />

mentioned from various locations around the world in diving guides (e.g., Allen & Steene 1994, 1996, Colin<br />

& Arneson 1995, Gosliner et al. 1996, Weinberg 1996, Debelius 1998, Fosså & Nilsen, 2000: Red Sea,<br />

Indonesia, Philippines, Caribbean). Some colonies have specimens with opercula with flat chitinous<br />

endplates, on a flat peduncle (more or less like that <strong>of</strong> Metavermilia) inserted as the second dorsal radiole. We<br />

suspect it is a complex <strong>of</strong> related species that needs to be sorted out. Vermiliopsis prampramiana Augener,<br />

1918, regarded to be undeterminable by Zibrowius (1973b), might belong here by its general chaetation<br />

pattern and 9 thoracic chaetigers. Neovermilia aberrans Rullier & Amoureux, 1979, might rather belong in<br />

this genus.<br />

1. ?Filogranella aberrans (Rullier & Amoureux, 1979), Brazil<br />

2. Filogranella elatensis Ben-Eliahu & Dafni, 1979, Elat, Gulf <strong>of</strong> Aqaba; Indo-West Pacific, Central Atlantic,<br />

Caribbean; probably more than one species<br />

3. ?Filogranella prampramiana (Augener, 1918), Gold Coast, Africa.<br />

12. Filogranula Langerhans, 1884<br />

(Fig. 19)<br />

Type-species: Filogranula gracilis Langerhans, 1884<br />

Number <strong>of</strong> species: 6<br />

Tube white, opaque, with elaborate peristomes; keel present. Granular overlay absent. Operculum with<br />

chitinous endplate, may have additional spines in the center. Peduncle cylindrical, smooth, without wings<br />

(however, see Remarks); inserted as second dorsal radiole on one side. Opercular constriction present (but for<br />

F. stellata, absent). Pseudoperculum absent. Radioles arranged in semi-circles, up to 7 per lobe. Inter-radiolar<br />

membrane and stylodes absent. Branchial eyes may be present. Mouth palps not observed. 7 thoracic<br />

chaetigerous segments. Collar generally non-lobed (may be trilobed) with entire edge, continuous with short<br />

thoracic membranes, ending at second thoracic chaetiger. Tonguelets absent. Collar chaetae fin-and-blade<br />

(Fig. 19A) and limbate. Apomatus chaetae present (Fig. 19B). Thoracic uncini saw- or saw-to-rasp-shaped<br />

44 · <strong>Zootaxa</strong> 2036 © 2009 <strong>Magnolia</strong> <strong>Press</strong><br />

TEN HOVE & KUPRIYANOVA

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