Author : Carl H. Eigenmann
Publisher :
ISBN 13 : 9781332964031
Total Pages : 190 pages
Book Rating : 4.9/5 (64 download)
Book Synopsis The Pygidiidae, a Family of South American Catfishes (Classic Reprint) by : Carl H. Eigenmann
Download or read book The Pygidiidae, a Family of South American Catfishes (Classic Reprint) written by Carl H. Eigenmann and published by . This book was released on 2016-06-26 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Pygidiidae, a Family of South American Catfishes The Pygidiidce are a family of South American catfishes distinguished exter nally by the absence of an adipose fin and by the posterior position of the dorsal. Most of them are even more readily distinguished by the presence of spines or thorns on the opercle and interopercle, by twin barbels at the angle of the mouth, and by the absence of all mental barbels. Other characters of the catfishes may be present or absent, and by addition, subtraction, or modification of characters, various subfamilies have been formed. A description of the characteristic strue tures is given on pages 276-279. The basal habit of all the members of the family is that of burrowing. The opercular and interopercular spines are an adaptation to their habit of insinuation, which is at the root of the commensalism, parasitism, and worse, to which some highly specialized members of the family are addicted. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.