Hydroides trivesiculosa Straughan, 1967b

Kupriyanova, Elena K., Sun, Yanan, Ten Hove, Harry A., Wong, Eunice & Rouse, Greg W., 2015, Serpulidae (Annelida) of Lizard Island, Great Barrier Reef, Australia, Zootaxa 4019 (1), pp. 275-353 : 293-294

Hydroides trivesiculosa Straughan, 1967b

( Fig. 10 )

Hydroides trivesiculosa Straughan, 1967b: 33 –34, fig. 3h–j [Heron Island, Qld; material studied].

Hydroides trivesiculosa .— Sun et al. 2015: 85 –87, fig. 28 [WA, NT, Qld, Australia].

Hydroides trivesiculosus . —ten Hove 1990: 119 [Discussion]; ten Hove 1994: 108 [ Seychelles]; Kupriyanova et al. 2008: 428, 430–431, fig. 1A [Lizard Island, Qld; DNA data]; ten Hove & Kupriyanova 2009: 53 [name only]; Bailey-Brock et al. 2012: 969, 973, fig. 4A [Enewetak, Rongelap, Marshall Islands], Sun et al. 2012b: 540 –545 [DNA data].

Material examined. AM W.16983 (3), near Bird Islet, 14°40'S, 145°28'E, exposed, 7 m, coll. P. Hutchings & P. Weate; AM W.16984 (2), near Bird Islet, grid C, from experimental fouling panels, coll. P. Hutchings & P. Weate, Jul 1978, det H. ten Hove 1981; AM W.16985 (2), near Bird Islet, 14°40'S, 145°28'E, experimental fouling grid C, near Bird Islet, C- 15-18-3, coll. P. Hutchings & P. Weate, det. H. ten Hove 1981; AM W.40553 (2), stn.G236, east lagoon near Bird Islet, 9 m, coll. G. Rouse & E. Kupriyanova, 29 Oct 2005; AM W.42057, stn.G232, between First Beach & Osprey Island, coral rubble, coll. G. Rouse & E. Kupriyanova, 26 Oct 2005; AM W.42334, Lagoon, 14°40'S, 145°27'E, 10 m, coll. P. Hutchings & P. Weate, Jun 1982, det. E. Kupriyanova; AM W.43909, MI QLD 2335; AM W.43964, MI QLD 2337; AM W.43968, MI QLD 2348 (2); AM W.44061, MI QLD 2356; AM W.44227, MI QLD 2367 (15); AM W.44233, MI QLD 2373; AM W.44234, MI QLD 2373; AM W.44534, MI QLD 2375; AM W.44541, MI QLD 2390 (7); AM W.45065, MI QLD 2413 (2); AM W.45068, MI QLD 2413 (2); AM W.45078, MI QLD 2417 (5); AM W.45083, MI QLD 2423; AM W.45090, MI QLD 2435 (20); AM W.45415, MI QLD 2446; AM W.45423, MI QLD 2447; AM W.46428, Coconut Beach, 14°40'54"S, 145°28'24"E, Halimeda sp. and rubble, 2 m, coll. C. Watson, 7 Feb 2009; AM W.46432, inter-reef sand, 14°23'24"S, 145°16'24"E, artificial substrate, 10 m, coll. M. Timmers, 9 Feb 2009; AM W.46529, same, 10 Feb 2009; AM W.46534, Yonge Reef, Deep Reef slope, 14°36'54"S, 145°37'11"E, coral rubble, 4–8 m, coll. M. Blazewicz-Paskowycz, 18 Feb 2009; AM W.46535, Hicks Reef Outer Barrier, Fore Reef, 14°28'48"S, 145°29'12"E, coral rubble, 2–18 m, coll. C. Watson & K. Mills, 14 Feb 2009; AM W.46536, same; AM W.47454, stn.G247, channel near Bird Islet, coll. G. Rouse & E. Kupriyanova, 3 Oct 2005; SAM E3601, stn.G229, Lagoon near Bird Islet, 7–8 m, coll. G. Rouse & E. Kupriyanova, 24 Oct 2005; ZMA V.Pol. 3448 (2), near Bird Islet, grid C, from experimental fouling panels, coll. P. Hutchings & P. Weate, det. H. ten Hove 1981, retained from AM W.16984–6.

Diagnosis. Opercular verticil inserted on a short stalk into proximal funnel. Verticil with 5–8 spines, one very large dorsal spine made of a bulbous median part and two latero-dorsal extensions and 4–7 small outwardly curved spines positioned at the base of dorsal verticil spine, each ending in T-shaped tip, without accessory spinules. Funnel with 18–25 chitinized radii tips, base of funnel slightly chinitized. Grooves separating radii extending 1/3 of funnel length ( Fig. 10 ).

Remarks. Hydroides trivesiculosa can usually be distinguished from H. albiceps by the exceptionally large size of the dorsal bulbous verticil spine, and the lower number of verticil spines, but there are (few) transitional forms. Additionally, molecular studies are needed to determine whether H. trivesiculosa and H. albiceps are separate species.

Distribution. Qld, tropical Australia, Tanzania, Red Sea, Seychelles, Indonesia.

Figures

FIGURE 10. Hydroides trivesiculosa, live animals in tubes. A. Stn. G 229, SAM E 3601; B. Stn. G 236, AM W. 40553. Photo: A, B—G. Rouse. Scale bars: A – B = 0.5 mm.