Polycirrus paivai Garraffoni & Costa, 2003

Glasby, Christopher J. & Hutchings, Pat, 2014, Revision of the taxonomy of Polycirrus Grube, 1850 (Annelida: Terebellida: Polycirridae), Zootaxa 3877 (1), pp. 1-117 : 85-86

Polycirrus paivai Garraffoni & Costa, 2003

Fig. 46a–e

Polycirrus paivai Garraffoni & Costa, 2003: 5–6 , figs 5–9.

Type locality. Abrolhos Archpelago , Brazil , 17˚58ʹ44ʺ S, 38˚42ʹ41ʺ W.

Material examined. None.

Description. Based on type description. Hototype complete, 10 mm long, 0.72 mm wide, about 55 segments.

Venter anteriorly with mid-ventral groove and discrete ventro-lateral pads; pads incised with slight transverse grooves, extending from segment 4. Mid-ventral groove from segment 4.

Buccal tentacles of one type. Upper lip prominent medial lobe, small wing-like lateral lobes, margin of medial lobe straight; oral surface glandular and ciliated. Outer lower lip flat, shield-like, pentagonal, large and cushionlike, ridged and grooved, extending posteriorly to segment 3 ( Fig. 46a ).

Notochaetigerous segments 12, extending to segment 14. Notopodia more-or-less rectangular, prechaetal lobe low, postchaetal lobe digitiform, longer than prechaetal ( Fig. 46b ). Notochaetae within a chaetiger consisting of two types, pinnate (type description does not say if these are primary or secondary), posteriorly same form as those anteriorly; presumed secondary notochaetae in all chaetigers smooth, narrowly winged, uniformly tapered ( Fig. 46c, d ). Neurochaetae beginning on segment 12, 9–12 uncini per row throughout. Uncini with short neck and straight to convex base (Type 1), teeth above main fang arranged in double transverse series ( MF:3:2) subrostral process present as low protuberance ( Fig. 46e ) .

Nephridial papillae not visible.

Figures

FIGURE 46. Polycirrus paivai Garraffoni & Costa. a.Ventral view of head end. b. Capillary notochaeta from anteriorbody. c. Other kind of notochaeta from anterior body. e. Lateral view of anterior uncinus. e. Anterior view of notopodium from anteriormid body. Scales b, e=9.9 µm, c=20 µm, a=90 µm, e=22.2 µm. (Modified after Garraffoni & Costa, 2003 and reproduced with permission from Zootaxa).