Pista cristata (Muller, 1776)
Plate XXXIII, figs. 10, 11
Pista cristata Ehlers, 1900b, p. 221. Puerto Madryn, southern South America, intertidal.
Ehlers, 1901, p. 213. Southern South America. Gravier, 1907, p. 53. Port Charcot, in 25-40 m. Gravier, 1911a, pp. 133-134. Deception Island, in 150 m.
Hessle, 1917, pp. 154-155. Summary.
Augener, 1932b, p. 60. Bridgeman Island, in 750 m. Uschakov, 1955, p. 386. Eastern sector of Antarctica.
Levenstein, 1964, p. 173. 66°21'06"S, 106°41'02" E, in55O m.
Diagnosis: Length of body to 90 mm; segments include 17 thoracic and more than 80 abdominal setigers. Branchiae 2 pairs, sometimes unequal in size, with the first pair the larger; each with a long stem and distal dense tuft of filaments (fig. 10). Anterior end with 3 pairs of lateral lobes, in segments 2, 3, and 4, with the middle pair the largest. Ventral scutes present on 20 segments. Notopodial setae broadly limbate. Long-handled uncini of first segment with slender shaft, decreasing in thickness posteriorly to fifth setiger (fig. 11).
Distribution: North and south Atlantic oceans; Antarctica; cosmopolitan; eurybathic.
(Hartman 1966)
