Hemipodia cf. simplex ( Grube, 1857 )

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

Hemipodia cf. simplex ( Grube, 1857)

( Fig. 9 )

Glycera simplex Grube, 1857: 177 . Synonyms see Böggemann 2002

Material examined. AM W.28564 (2), Great Barrier Reef, Outer Yonge Reef, rock with Lithothamnion and Halimeda , 30 m, 21 Jan 1977, af/15.5/86/0.6/0.3, mf/6/26/0.5/0.3, pf/10.5/49/0.5/0.3.

Diagnosis. Proboscidial papillae mainly conical with more or less distinctly straight, median, longitudinal ridge; ailerons rod-like; parapodia of mid-body with one short, rounded postchaetal lobe; branchiae absent; ventral cirri in anterior parapodia conical, in posterior parapodia elongated and more slender triangular to digitiform.

Description. Body ca. 32 mm long with ca. 161 chaetigers. Mid-body segments more or less distinctly triannulate.

Conical prostomium consisting of about eight rings; terminal ring with four appendages and basal one with pair of nuchal organs ( Fig. 9 A).

Proboscis with two types of papillae: l. numerous conical papillae; 2. isolated, broader, oval to globular papillae ( Fig. 9 B). Terminal part of proboscis with four hook-shaped jaws arranged in a cross and accessory rodlike ailerons ( Fig. 9 C).

All parapodia uniramous ( Fig. 9 D–K). One slender triangular to digitiform prechaetal lobe; in posterior parapodia slightly thinner and elongated. One short, rounded postchaetal lobe. Dorsal cirri from 3rd parapodium, conical to oval; inserted on body wall slightly above parapodial base. Ventral cirri in anterior parapodia conical, about as long as or slightly shorter than postchaetal lobe; in posterior parapodia elongated and more slender triangular to digitiform; in last parapodia about as long as prechaetal lobe; situated near parapodial base. Branchiae absent.

Parapodia with a single acicula ( Fig. 9 D–K). Only compound spinigers with blades of different lengths.

Pygidium with dorsal anus; cirri not observed.

Remarks. Only a short part of the proboscis with a few papillae near the jaws is present. These proboscidial papillae are poorly defined and the structure on their posterior surface is indistinct. Therefore, the specimen is only uncertainly referred to Hemipodia simplex .

Distribution. Yonge Reef; 30 m.

Figures

FIGURE 9. Hemipodia cf. simplex (Grube, 1857), AM W. 28564. A. Anterior end, dorsal view; B. Proboscidial papillae; C. Aileron; D – K. Anterior to posterior parapodia, posterior view, aciculae suggested, chaetae omitted.