Goniada emerita Audouin & Milne Edwards, 1833

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

Goniada emerita Audouin & Milne Edwards, 1833

( Fig. 14 )

Goniada emerita Audouin & Milne Edwards, 1833: 268 ; pl. 18, figs 1–4.

Material examined. AM W.44865, MI QLD 2435, af/25/117/1.7/0.9.

Diagnosis. Proboscis with a few different types of papillae; 4–26 pairs of chevrons; 46–69 uniramous chaetigers, following biramous; acicular notochaetae situated between dorsal cirrus and notopodium, neurochaetae compound spinigers.

Description. Anterior fragment 25 mm long with 117 chaetigers. Segments uni-annulate, but median part of dorsum usually appears to be bi-annulate.

Conical prostomium consisting of 9–10 rings; terminal annulus with four biarticulate appendages and basal one with pair of nuchal organs. Pair of basal subdermal eyes present ( Fig. 14 A).

Proboscis with predominantly heart-shaped to rectangular papillae on short stalks in more or less longitudinal rows. Macrognaths quinquedentate (with 5 teeth); 13 H+v/w-shaped dorsal and 14 H+v/w-shaped ventral compound micrognaths, dorsal arc additionally with four smaller, simple rod-like micrognaths in outer position and between other ones. Six chevrons on each side of proboscis.

First segment partly apodous and achaetous; typical pair of small lateral cirri missing ( Fig. 14 A). First chaetiger mainly with only one neuropodial pre- and one postchaetal lobe; second, lower prechaetal lobe developed from chaetiger two; both prechaetal lobes digitiform, upper one slightly broader and longer than lower one; conical to triangular postchaetal lobe always distinctly shorter ( Fig. 14 B–C). 66 uniramous chaetigers, following parapodia biramous with conical to triangular notopodial lobes ( Fig. 14 D–F). From 66th chaetiger parapodia enlarged and with noto- and neuropodia clearly separated. Dorsal cirri on anterior chaetigers digitiform, about as long as neuropodial postchaetal lobes or slightly shorter ( Fig. 14 B–C); in biramous parapodia more conical and about as long as notopodial lobes ( Fig. 14 D–F). Ventral cirri in anterior parapodia digitiform, about as long as neuropodial postchaetal lobes or slightly longer ( Fig. 14 B–C); in enlarged biramous parapodia more conical, about as long as neuropodial postchaetal lobes or slightly shorter ( Fig. 14 D–F).

Noto- and neuropodia each with a single acicula ( Fig. 14 B–F). Usually two acicular notochaetae with straight tip, situated between dorsal cirrus and notopodium ( Fig. 14 D–F). Neurochaetae compound spinigers with blades of different lengths.

Distribution. Lizard Island, Macgillivray Reef; 14– 18 m.

Figures

FIGURE 14. Goniada emerita Audouin & Milne Edwards, 1933, AM W. 44865. A. Anterior end, dorsal view; B – F. Anterior to mid-body parapodia, posterior view, aciculae suggested, neurochaetae omitted.