Terebrasabella fitzhughi Murray & Rouse, 2007, Murray & Rouse, 2007

Capa, María & Murray, Anna, 2015, A taxonomic guide to the fanworms (Sabellidae, Annelida) of Lizard Island, Great Barrier Reef, Australia, including new species and new records, Zootaxa 4019 (1), pp. 98-167: 155

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Terebrasabella fitzhughi Murray & Rouse, 2007


Terebrasabella fitzhughi Murray & Rouse, 2007  

( Fig. 23 A–D View FIGURE 23. A – D )

Terebrasabella fitzhughi Murray & Rouse, 2007: 57 View Cited Treatment   –61¸ figs 5–8.

Material examined. Queensland, Outer Yonge Reef, Great Barrier Reef: AM W.29465, 14° 36 ′S, 145 ° 38 ′E, rock and coral rubble with encrusting pink coralline algae, 9m, 21 Jan 1977; AM W.29466, 14° 36 ′S, 145 ° 28 ′E, coral rubble from bommie, covered in Lithothamnion   and other algae, 30 m, 25 Jan 1977.

Other material examined. Tasmania: Holotype: AM W. 29467, Eaglehawk Neck, 43 °01′S, 147 ° 55 ′E, inside spirorbid tubes attached to rock, intertidal, 3 Apr 1995. Paratypes: AM W. 29468, AM W. 29469 (2 on SEM), from same sample.

Description of material examined. Specimens up to 2.6 mm long and 0.5 mm wide, with eight thoracic and three abdominal chaetigers. Only preserved specimens studied, and all white. Anterior half of body slender, elongate and posterior abdomen slightly expanded, sac-like, external segmentation indistinct (generic features only shared with Caobangia Giard, 1893   , within Sabellidae   ). Radiolar lobes semicircular, with two pairs of radioles with up to eight pinnules and filamentous distal ends. Ventral basal flanges present, dorsal basal flanges absent. Basal membrane, radiolar flanges and radiolar eyespots absent. Two rows of vacuolated cells support radioles basally. Dorsal lips with short radiolar appendages. Ventral lips, ventral sacs and parallel lamellae absent. Posterior peristomial ring collar indistinct dorsally, with elongate ventral lappets separated by a wide midventral incision ( Fig. 23 A–B View FIGURE 23. A – D ). Glandular ridge on anterior chaetigers absent. Poorly developed ventral shields on chaetigers 1 –5, 7– 8 and 9–11. Collar chaetae broadly-hooded. Following thoracic notochaetae arranged in transverse rows on inconspicuous notopodia, broadlyhooded. Neuropodial uncini of chaetigers 2–6 acicular, with similar-sized teeth over the main fang, vestigial breast and long handle ( Fig. 23 C View FIGURE 23. A – D ). Neuropodia of chaetigers 7–8 with numerous rasp-shaped avicular uncini with five or more rows of small teeth over the main fang, well developed breast and long handle ( Fig. 23 D View FIGURE 23. A – D ). Companion chaetae present on chaetigers 2–6, with asymmetrical hood, with fibrous appearance for half hood length except marginally ( Fig. 23 D View FIGURE 23. A – D ). Abdominal neurochaetae narrowly-hooded. Abdominal notopodial uncini acicular, similar to those in chaetigers 2–6. Pygidium inconspicuous, anus opening dorsally. Pygidial eyespots absent. Pygidial cirri absent. Tube a mucilaginous sheath, lining burrow inside dead coral.

Remarks. Of the three species of Terebrasabella   described to date, T. fitzhughi   is the only one with homodont teeth on uncini (i.e. similar-sized teeth on a crest above main fang). The other species described from Lizard Island, T. hutchingsae   , is distinguished from T. fitzhughi   by the presence of “palmate” uncini on chaetiger 2, while the type species, T. heterouncinata   from South Africa, has crested uncini but with different-sized teeth above the main fang ( Murray & Rouse 2007).

Habitat. Rocks and coral rubble from intertidal to 30 m depth. Not abundant.

Type locality. Eaglehawk Neck, Tasmania.

Distribution. Australia (Tasmania: Eaglehawk Neck; Queensland: Great Barrier Reef).














Terebrasabella fitzhughi Murray & Rouse, 2007

Capa, María & Murray, Anna 2015

Terebrasabella fitzhughi

Murray 2007: 57