Pseudoscalibregma bransfieldium Hartman 1967

• Main Author: Blake, James A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2015
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Scalibregmatidae; Pseudoscalibregma; Pseudoscalibregma bransfieldium; Antarctic; Antarctic Peninsula; Noto; Antarc*; Ice Shelf
• Online Access: https://zenodo.org/record/6102459; https://doi.org/10.5281/zenodo.6102459

Pseudoscalibregma bransfieldium (Hartman, 1967) Figure 6 F‒G Eusclerocheilus bransfieldia Hartman, 1967: 130 ‒131, pl. 39 Hyboscolex bransfieldia: Kudenov & Blake, 1978: 440. Pseudoscalibregma bransfieldia: Hartman, 1978: 180 ‒181, fig. 28 Pseudoscalibregma bransfieldium: Blake, 1981: 1143 ‒1145, fig. 6; Hartmann-Schröder & Rosenfeldt, 1991: 75. Material examined. East Antarctic Peninsula, RVIB Nathaniel B. Palmer Cruise 2000 -03, Collector, J.A. Blake. —Larsen-A Ice Shelf Area, transect along border with Larsen B, Sta. NBP- 10, 332 m, 1 specimen (LACM- AHF Poly 7010). Additions to description. Single specimen complete, 10 mm long, 3 mm wide with 22 setigers; the body more maggot-shaped than arenicoliform. In alcohol, color light tan with no body pigment. Prostomium bears two long frontal horns projecting anterolateral; dorsal surface of prostomium somewhat domed or elevated, clearly visible; eyes absent; nuchal organs not apparent. Peristomium a single dorsal ring surrounding the prostomium dorsally; ventrally forming upper and lower lips of mouth with upper lip relatively smooth and lower lip with three weakly developed lobes. A weakly developed ventral groove apparent along body from setiger 4; initially, groove formed by a single large segmental annulus that at the mid-point produces a notch between segments; in last 5‒6 segments, a distinct furrow develops at segmental mid-point. The pygidium damaged, but bears five anal cirri. Anterior parapodia weakly developed with low noto- and neuropodia; posteriorly podial lobes elongate, apically pointed, bearing distinctive dorsal and ventral cirri (Fig. 6 G), both of which are bulbous extensions of the podial lobes; internal glands absent from cirri and elsewhere on body. Interramal papillae weakly developed. Setae consist of numerous capillaries arranged in 2‒3 rows throughout; lyrate setae from setiger 2; setiger 1 bears an anterior row of short, thin, spinous setae (Fig. 6 F) anterior to capillaries, the homologues of lyrate setae now known to occur on ...