Pista cristata (Müller 1776)

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)

southern Gaspe waters (Baie des Chaleurs, Gaspe Bay to American, Orphan and Bradelle banks; eastern boundary: eastern Bradelle Valley), downstream part of middle St. Lawrence estuary, lower St. Lawrence estuary; Laurentian Channel (bathyal zone)(=Honguedo Strait)

bathyal, infralittoral and circalittoral of the Gulf and estuary

Known from seamounts and knolls