Goniada grahami Benham, 1932

Böggemann, Markus, 2015, Glyceriformia Fauchald, 1977 (Annelida: “ Polychaeta ”) from Lizard Island, Great Barrier Reef, Australia, Zootaxa 4019 (1) : -

Goniada grahami Benham, 1932

(Fig. 15)

Goniada grahami Benham, 1932: 561 , figs 6–9.

Material examined. AM W.28584, Lizard Island, Watsons Bay, 400 m off Chinaman's Ridge, filamentous algae, 12 m, 13 Oct 1978, af/35/77/1.8/1.0; AM W.46141, Osprey Island, near Lizard Island, 3 m, 16 Jul 1979, af/20/100/ 1.3/0.7, pf/2/20/1.3/0.7.

Diagnosis. Prostomium with 9–10 rings; proboscis with a few different types of papillae, ventral proboscidial papillae all small, heart-shaped to rounded; 9–24 pairs of chevrons; 53–90 uniramous chaetigers, following biramous; acicular notochaetae situated dorsal to dorsal cirrus, between dorsal cirrus and notopodium, and below notopodium, neurochaetae compound spinigers.

Description. Body at least 35 mm long with up to 120 chaetigers. Segments uni-annulate, but median part of dorsum sometimes appears to bi-annulate.

Conical prostomium consisting of about nine rings; terminal annulus with four biarticulate appendages and basal one with pair of nuchal organs. Eyes absent (Fig. 15A).

Proboscis with predominantly heart-shaped to rectangular papillae on short stalks in more or less longitudinal rows. Macrognaths tri- to quinquedentate (with 3–5 teeth); 5–11 H+v/w-shaped dorsal and 3–7 H+v/w-shaped ventral compound micrognaths, dorsal arc additionally with four smaller, simple rod-like micrognaths in outer position and between other ones. 7–9 chevrons on each side of proboscis.

First chaetigers with only one neuropodial pre- and one postchaetal lobe; second, lower prechaetal lobe developed from chaetiger 2–6; both prechaetal lobes digitiform, upper one slightly longer and broader than lower one; conical to triangular postchaetal lobe always distinctly shorter (Fig. 15B–C). 53–69 uniramous chaetigers, following parapodia biramous with slender digitiform to conical notopodial lobes (Fig. 15D). From 57th to about 78th chaetiger parapodia enlarged and with noto- and neuropodia clearly separated (Fig. 15E–G); notopodial lobes broader and more conical to triangular, neuropodial lobes of about same shape as before, but postchaetal lobes slightly elongated; in posterior parapodia notopodial lobes, lower neuropodial prechaetal lobes and neuropodial postchaetal lobes shorter and upper neuropodial prechaetal lobes slightly more slender (Fig. 15H–I). Dorsal cirri on anterior chaetigers digitiform, about as long as neuropodial postchaetal lobes or slightly shorter (Fig. 15B–C); in anterior biramous parapodia slightly longer than notopodial prechaetal lobes (Fig. 15D); in enlarged biramous parapodia more conical to triangular, about as long as notopodial prechaetal lobes (Fig. 15E–G); in posterior parapodia slender, elongated and more digitiform (Fig. 15H–I).Ventral cirri in anterior parapodia digitiform, about as long as lower neuropodial prechaetal lobes or slightly longer (Fig. 15B–D); in enlarged biramous parapodia more conical, about as long as neuropodial postchaetal lobes (Fig. 15E–G); in posterior parapodia slender, elongated and more digitiform, about as long as upper neuropodial prechaetal lobes (Fig. 15H–I).

Noto- and neuropodia each with a single acicula (Fig. 15B–I). Usually three acicular notochaetae with straight or slightly bent tip, one situated dorsal to dorsal cirrus, one between dorsal cirrus and notopodium, and one or two below notopodium (Fig. 15D–I). Neurochaetae compound spinigers with blades of different lengths.

Pygidium with dorsal anus; cirri not observed.

Distribution. Lizard Island Group; 3– 12 m.