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Pista spinifera (Ehlers, 1908)
Plate XXIX, figs. 5-7; Plate XXX, fig. 1


Scione spinifera Ehlers, 1908, pp. 152-153, pl. 20, figs. 10-14. East of Bouvet Island, in 439-463 m.


Gravier, 1911a, pp. 134-135, pl. 12, fig. 156. Mar­guerite Bay, in 250 m.


Ehlers, 1913, p. 561, p1. 44, fig. 7. Wilhelm II Coast, in 385 in.


Pista spinifera Augener, 1932b, p. 60. Bouvet Island and Port Lockroy, in 120-300 m.


Diagnosis: The tube is characteristic; long, tapering basally, somewhat spirally twisted and ridged (pl. XXX, fig. 1), with long lateral projections (fig. 6, 7). Length of body 105 mm; width 6 mm; segments number about 134, of which 17 are thoracic setigers. The anal end terminates in a circlet of 12 threadlike cirri. Branchiae 1 pair, each one with a thick stem, bifur­cated and then again divided numerous times (fig. 5). The first 3 segments with irregularly divided ventral shields.


First segment with a pair of long, ventral, semicircular lateral lobes; second segment with short lobes, laterally concealed by the third segment. The fourth segment the first setiger; uncini from the second setiger. Anterior uncini lack a long handle.


Distribution: East of Bouvet Island; west of Antarctic Peninsula; Wilhelm II Coast; in moderate depths.”


(Hartman, 1966)


Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© National Museum of Natural History, Smithsonian Institution

Source: Antarctic Invertebrates Website (NMNH)

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