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The Choniostomatidae, a Family of Copepoda; Parasites on Crustacea Malacostraca (Paperback) Loot Price: R320
Discovery Miles 3 200
The Choniostomatidae, a Family of Copepoda; Parasites on Crustacea Malacostraca (Paperback): Hans Jacob Hansen
The Choniostomatidae, a Family of Copepoda; Parasites on Crustacea Malacostraca (Paperback): Hans Jacob Hansen

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The Choniostomatidae, a Family of Copepoda; Parasites on Crustacea Malacostraca (Paperback)

Hans Jacob Hansen

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Loot Price R320 Discovery Miles 3 200

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 edition. Excerpt: ...from those of the females. OVISACS. Always deposed freely. LARVA. Observed in scarcely half of the species. Antennae at most a little longer than the antennulae, sometimes very short. Maxillipeds situated close behind the maxillae. Peduncle of the natatory legs of medium breadth or narrow. Posterior abdominal segment together with the caudal stylets nearly always smaller than the penultimate segment Long seta of the caudal stylets longer than half the length of the cephalothorax. POST-LARVAL DEVELOPMENT. Known or partly known in several species (s. above). HABITAT. The marsupium of Amphipoda, Cumacea andlsopoda. Younger females and animals in various stages of development of some species are also found on the ventral surface of the thorax in Amphipoda. Found in Denmark, Norway, Greenland, in the Kara Sea, the Mediterranean, off Cuba, and finally on the East-coast of Asia between about lat. 22 and 51 N. REMARKS. This genus is very large. Subsequently thirty-four species will be described, besides S. Leuckartii Sai., which I have not seen (and S. diadema G. and B. which has not been described). The above given diagnosis of the genus is rather meagre, and it is easy to see that some of the characteristics are qualified by an -either... or-. The obvious reason is that many of the species in several respects vary considerably among themselves. Above, on p. 82--83 I have already given a general view of the most important of these differences, stating my reasons for not feeling justified--in spite of these differences--to divide the genus into several genera. It is impossible, for two reasons, to give complete analytical keys of the two sexes in all species, firstly, because the male is unknown in nine species, secondly, because the...

General

Imprint: Rarebooksclub.com
Country of origin: United States
Release date: July 2012
First published: July 2012
Authors: Hans Jacob Hansen
Dimensions: 246 x 189 x 5mm (L x W x T)
Format: Paperback - Trade
Pages: 102
ISBN-13: 978-1-150-16394-4
Barcode: 9781150163944
Categories: Books
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LSN: 1-150-16394-1

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