Antarctic Cirripedia

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Published by way of the yank Geophysical Union as a part of the Antarctic study Series.

This is the 1st try to assemble what's recognized of the antarctic cirriped fauna in a single complete treatise. It covers the systematics of the barnacles of subantarctic and antarctic areas and their distribution, either fresh and paleontological. A moment half already in coaching will record on planktonic larvae.

Antarctic Cirripedia, the second one monographic contribution within the Antarctic learn sequence, in most cases follows the trend set via Kott's Antarctic Ascidiacea (1969). The examine, so far as attainable, covers all documents made through prior expeditions to Antarctic waters and culminates during this quantity with the 1962-1965 cruises of USNS Eltanin. The checklist of the vital vessels that have introduced again cirriped fabrics from antarctic areas is a outstanding one: Aurora, Belgica, Challenger, Discovery, Endeavour, Ob', Pourquoi-Pas?, Soya, Terra Nova, Umitaka-Maru and William Scoresby. but the variety of benthic samplings of cirripeds made by means of Eltanin below the U.S. Antarctic study software from south of the Antarctic Convergence exceeds the whole of these back through all prior expeditions.

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1 2 A ) . Tergum somewhat triangular; basal and carinal margins slightly convex; distal extremities of plate acuminate; umbo apical. Scutum subparallelogrammic; tergal margin concave; carinal, basal, and occludent margins convex; height of plate more than twice width; umbo apical. Carina bowed, roof simply and evenly rounded; umbo apical. Upper latus of 5 unequal sides; scutal margin concave, others convex; scutal margin longest; tergal and basicarinal margins of nearly equal length; umbo apical.

1VIaxilla I1 triangular in outline; marginal setae divided into distinct clusters; setae of superior proximal cluster longer than those in other 2 clusters. Rami of cirrus I grossly unequal (fig. 12K) ; pos:; length of anterior ramus; terior ramus about 3 intermediate articles not significantly protuberant; inner faces of both rami heavily clothed with randomly arrayed, long setae. Cirrus I not greatly modified; cirrus 11 not modilied, approximatirig cirri 111 and 1V. Each articulation along greater curvature of intermediate articles of cirri 11-VI with 1 long and 1 or 2 shorter setae; at distal erld of each intermediate article parallel to articulation there is a row of ctenoid scales; interarticular areas along greater curvature free of setae; setae absent from inner lateral faces of intermediate articles.

Anatifera, is 33 cosmopolitan in distribution, and is not kriowri to occur in antarctic waters. While it has been reported from New Zealand and South Africa, the present record from south of Cape Horn is apparently the first from South America. Lepas fascicularis is the only pelagic barnacle known to produce a float of its own. ) in the usual way, but the selection is clearly for small rather than for large objects. Growth proceeds rapidly after metamorphosis, but before the weight of the barnacle exceeds the buoyancy of the object, a highly vacuolatetl secretion is deposited around the attach- Fig.

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