Nereis

Glasby, Christopher J., 2015, Nereididae (Annelida: Phyllodocida) of Lizard Island, Great Barrier Reef, Australia, Zootaxa 4019 (1), pp. 207-239 : 226

Nereis ‘mixed_paragnaths_NTM W22634’ Glasby

( Fig. 4 D, E)

Material examined. NTM: W22738 (1), Waining Reef, 14°27.08'S 145°18.83'E, coll. C. Watson, 15 Feb 2009; W23906 (1), High Rock, 14°49.5108'S 145°33.096'E, coll. CReefs Lizard 10 Team, 6 Sep 2010; W23907 (1), High Rock, 14°49.56'S 145°33.1319'E, coll. CReefs Lizard 10 Team, 11 Sep 2010; W23941 (1), North Direction Island, 14°44.718'S 145°30.2939'E, coll. CReefs Lizard 10 Team, 4 Sep 2010; W23943 (1), Day Reef, 14°28.3308'S 145°31.41'E, coll. CReefs Lizard 10 Team, 5 Sep 2010; W23951 (1), MacGillivray Reef, 14°38.8751'S 145°29.196'E, coll. CReefs Lizard 10 Team, 31 Aug 2010; W23955 (1), MacGillivray Reef, 14°38.85'S 145°29.2739'E, coll. CReefs Lizard 10 Team, 3 Sep 2010; W23971 (1), Mermaid Cove (buoy), 14°38.7612'S 145°27.2159'E, coll. CReefs Lizard 10 Team, 27 Aug 2010; W23977 (1), Mrs Watson's Bay, 14°39.4332'S 145°27.042'E, coll. CReefs Lizard 10 Team, 27 Aug 2010; W23981 (1), Bommie Bay, 14°39.687'S 145°28.32'E, coll. CReefs Lizard 10 Team, 12 Sep 2010.

Diagnosis. Nereis species having two dark brown dorsal bands on chaetigers 1 and 2, and from chaetigers 4–10 light brown broken bands ( Fig. 4 D); paragnaths include mixture of large and small cones (hence the informal name), with Areas VII–VIII having about 25–30 paragnaths arranged in 1 or 2 broken lines, and divided into three groups ( Fig. 4 D, E); two notopodial ligules and homogomph falcigers with short, straight, smooth blades.

Remarks. An informal taxon name is introduced for this species, which superficially resembles a Ceratonereis species in terms of pigmentation pattern. Morphologically it is closest to species like Nereis coutieri and N. cirriseta . Full description of the species, including a decision on whether it is new or not must await a molecular study.

Habitat. Lagoon to reef slope, associated with patch reefs in lagoon, and Halimeda , 2– 20 m.

Figures

FIGURE 4. A. Nereis trifasciata NTM W 22730, preserved, antero-dorsal view, pharynx everted; B. N. trifasciata NTM W 22730, preserved, antero-ventral view, pharynx everted; C. N. ‘ lizard _ NTM W 23960 ’ AM W. 43850, alive, dorsal view; D. N. ‘ mixed _ paragnaths _ NTM W 22634 ’ NTM W 22634, Heron Island, preserved, antero-dorsal view, pharynx everted; E. N. ‘ mixed paragnaths _ NTM W 22634 ’ NTM W 22634, Heron Island, preserved, antero-ventral view, pharynx everted; F. Perinereis nuntia species group AM W. 44302, alive, dorsal view; G. P. pictilis AM W. 43803, alive, dorsal view; H. P. pictilis alive, close up of AM W. 43803, antero-dorsal view. Photo: Alexander Semenov (C, F – H). Approximate body widths: A, B: 2.2 mm; C: 1.0 mm; D, E: 1.7 mm; F: 3.0 mm; G, H: 2.1 mm.