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In Situ Observations of Deepwater Medusae in the Genus Deepstaria, with a Description of D. Reticulum, Sp. Nov.

Published online by Cambridge University Press:  11 May 2009

R. J. Larson ,
L. P. Madin  and
G. R. Harbison
R. J. Larson
Affiliation:
Harbor Branch Oceanographic Institution, 9600 Old Dixie Highway, Fort Pierce, FL 34946
L. P. Madin
Affiliation:
† Woods Hole Oceanographic Institution, Woods Hole, MA 02543
G. R. Harbison
Affiliation:
Harbor Branch Oceanographic Institution, 9600 Old Dixie Highway, Fort Pierce, FL 34946
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Extract

Medusae are common constituents of the meso-and bathypelagic fauna. Small, transparent trachyline hydromedusae are usually most abundant, but the larger (2–10 cm diameter) pigmented coronate scyphomedusae are often collected in trawl nets (Thurston, 1977; Roe, James & Thurston, 1984; Larson, 1986) or observed from submersibles (Mackie & Mills, 1983; Mackie, 1985; Larson, Madin & Harbison, unpublished observations). Larger (30–70 cm) deep-sea semaeostome scyphomedusae are only infrequently collected in nets (Harbison, Smith & Backus, 1973; Larson, 1986), and would appear to be the rarest forms. For example, Thurston (1977) collected over 16000 midwater medusae in trawls yet he did not report taking a single mesopelagic semaeostome. However, recent investigations using submersibles have shown that these medusae are much more common than net hauls alone would suggest (Smith, 1982).

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 68 , Issue 4 , November 1988 , pp. 689 - 699
Copyright
Copyright © Marine Biological Association of the United Kingdom 1988

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