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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 accomplished 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 instruction will record on planktonic larvae.
Antarctic Cirripedia, the second one monographic contribution within the Antarctic learn sequence, in most cases follows the development set via Kott's Antarctic Ascidiacea (1969). The research, so far as attainable, covers all documents made through past expeditions to Antarctic waters and culminates during this quantity with the 1962-1965 cruises of USNS Eltanin. The checklist of the imperative vessels that have introduced again cirriped fabrics from antarctic areas is a impressive 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 through Eltanin below the USA Antarctic learn software from south of the Antarctic Convergence exceeds the full of these back by way of all previous expeditions.
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Additional info for Antarctic Cirripedia
Lepas anatifela and L. australis are very similar in appearance. The latter generally has an internal umbonal tooth on both scuta rather than only on the right scutum, and the capitular plates are generally thicker and less brittle. As Nilsson-Cantell has remarked, the trophi and cirri of different species of Lepas are remarkably similar and characteristics of systematic value have yet to be found. The number and disposition of the filamentary appendages, on the other hand, have been useful in separating species of the genus (Broch, 1959; 31 de Graaf, 1952), but both L.
In very young specimens, they are of the same length with the carina, but after the carina has ceased to grow, the terga always increase a little, and sometimes to such a degree as to be even thirty or forty times as long as carina. When most developed they are not above one third as long as the scuta, to which they lie at nearly right angles; they consist of imperfectly calcified plates, square at both ends, slightly broader and thinner at the end towards the carina, where they are a little curled inu'ards, than at the opposite end; they are not quite flat in any one plane; internally they are slightly concave; finally, they nearly resemble in miniature the terga of C.
L o ) , these growth lines are caused by recession of the corium. As a result, the apices of the plates project freely beyond the capitulum. 29 the prominence of the tergum's apico-basal ridge, the absence of longitudinal ribbing and the variable thickness of the growth lines suggest that this may represent a separate species. An adjacent tergum and scutum may form part of the right side of a capitulum. "The Alexander Island cirripedes are distinguished from Zeugmatolepas georgiensis on the basis of the relative proportions of the terga (those of 2.