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T 00 H L He S ______Ae: Isces) D 0.259 T 00 H L HE S ________ AE: ISCES) D • URTY • , I o OGIC L D OCCASIONAL PAPER No. 259 RECORDS OF THE ZOOLOGICAL SURVEY OF INDIA Taxonomic Revision of the Flatheads (Platycephalidae : Pisces) of India v. SRIRAMACHANDRA MURTY Formerly Head, Division of Demersal Fisheries, Central Marine Fisheries Research Institute, Cochin; B-4/320, Kendriya Vihar, Yelahan ka, Bangalore 560064 AND Y. MANIKYAM Department of Zoology, Ideal College of Arts and Sciences, Kakinada 533001 Edited by the Director, Zoological Survey of India, Kolkala Zoological Survey of India Kolkata CITATION Murty, V. Sriramachandra and ManikyalTI, Y. 2007. Taxonomic revision of the tlatheads (Platycephalidae : Pisces) of India, Rec. zool. Surv. India. Occ. Paper No .. 259 : 1-100, Plates I-VIII, (Published by the Director, Zoo I. Surv. india, Kolkata) Published: February, 2007 ISBN 81-8171-134-3 © Govt. of India, 2007 ALL RIGHTS RESERVED • No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise without the prior permission of the publisher. • This book is sold subject to the condition that it shall not, by way of trade, be lent, resold hired out or otherwise disposed of without the publisher's consent, in any form of binding or cover other than that in which, it is published. • The correct price of this publication is the price printed on this page. Any revised price indicated by a rubber stamp or by a sticker or by any other means is incorrect and should be unacceptable. PRICE Indian Rs. 300.00 Foreign $ 20 £ 15 Published at the Publication Division, by the Director, Zoological Survey of India, 234/4 AJ .C. Bose Road, 2nd MSO Building, NizalTI Palace (13th floor), Kolkata - 700 020 and printed at Krishna Printing Works, Kolkata - 700 006. RECORDS OF THE ZOOLOGICAL SURVEY OF INDIA OCCASIONAL PAPER No. 259 2007 Pages 1-100 CONTENTS INTRODUCTION ..................................................................................................................... I MATERIAL AND METHODS ................................................................................................. 2 THE GENERA OF FLATHEADS ............................................................................................ 4 THE VALID GENERA AND THEIR SYNONYMS ........................................................... 16 KEY FOR THE GENERA ..................................................................................................... 18 DESCRIPTION OF SPECIES ............................................................................................... 18 1. Platycephalus indicus (Linnaeus, 1758) ...................................................................... J 9 2. Rogadius asper (Cuvier, 1829) .................................................................................... 22 3. Rogadius polyodon (Bleeker, 1853) ............................................................................ 25 4. Grammoplites scaber (Linnaeus, 1758) ...................................................................... 27 5. Sorsogona tuberculata (Cuvier, 1829) ......................................................................... 30 6. Sorsogona serrata (Cuvier, 1829) ............................................................................... 33 7. Sorsogona we/anderi (Schultz, 1966) ......................................................................... 37 8. Inegocia carbuncula (Valenciennes, 1833) ................................................................. 40 9. Inegocia isacantha (Cuvier, 1829) .............................................................................. 43 10. Inegocia sculpta (GUnther, 1880) ................................................................................ 48 II. Inegocia rodericensis (Cuvier, 1829) .......................................................................... 52 12. Inegocia supposi/a (Troschel, 1840) ......................................................................... 56 13. Inegocia crocodila (Tilesius, 1812) ............................................................................. 58 14. Inegocia malayana (Bleeker, 1853) ............................................................................. 61 Species Distribution in the Indian Seas .................................................................................. 66 SUMMARY ............................................................................................................................ 67 ACKNOWl·EDGEMENTS ................................................................................................... 68 REFERENCES ....................................................................................................................... 68 TABLES 2 TO 20 .............................................................................................................. 77-91 PLATES ........................................................................................................................... 93-100 INTRODUCTION The fishes of the falnily Platycephalidae are restricted (excluding one species each in the Atlantic and Mediterranean, see Knapp, ] 98]) to the Indo-Pacific .. represented by a total or about 70 valid species. A perusal of the literature on the taxonomy shows that excepting a few instances (e.g. Matsubara and Ochiai, 1955; De Beaufort and Briggs, 1962; Schultz. 1966; Murty, 1982; Knapp 1973, 1987), attention has not been paid either to exalnine adequate nlllnber of specimens or to study the i1nportant characters (e.g. the ridges on head) that provide the basis for distinguishing genera/species in the falnily. As is \vell known, the earlier authors, particularly the original authors, did not provide adequate descriptions of the species in most cases. Further, several genera were erected on inadequate grounds. Consequently, sOlne authors preferred to include all the species under a Single genus : Platycephalus (e.g. De Beaufort and Briggs, 1962; Talwar and Kacker, 1984) while in several instances the species were assigned to genera \vith uncertainty. Though the fe\v taxonolnic studies in the recent past (Matsubara and Ochiai, 1955; De Beaufort and Briggs, 1962; Murty, 1982; Kuiter, 1994; hnalnura .. 1996) added considerably to the kno\vledge of the family, there is still need for further research since it has been noticed that: I. the classification of the family into different genera is still in confusion, ii. the type specirnens of all the notninal species in the farnily, particularly those of the type species of va rio liS nominal genera, were not redescribed subsequently (except De Beaufort and Briggs, 1962, who examined and prepared S0l11e species descriptions on the basis of type Inaterial) leading to problelns of inadequate understanding of the valid genera. species and their synonYlns, III. there are practically no biometric data of individual species from particular localities based on adequate samples, to facilitate cOlnparison of matenal from different localities either for detennination of geographic variation or for understanding whether infraspecific categories exist, and iv. as revealed by certain recent studies, lack of fresh Inaterial for research and too Inllch of dependence on a few specitnens in the museuln collections also contributed significantly to the inadequacies in the understanding of genera and species. In the light of the above, a revision of the family from India has been undertaken llsing fresh collections and the results are presented in this paper. 2 Rec. =001. Surv. India. Occ. Paper No. 259 MATERIAL AND METHODS Specilnens for the present study were largely collected from the comlnercial trawl landings during J 986-1988 froln off Kakinada (Andhra Pradesh). Specimens vvere also collected froln other landing centres along the country's Inainland coast and Lakshadweep Islands. Moreover, the specilnens in the collections of the Zoological Survey of India (ZSI), Kolkata and those in the Reference Collection Museum of the Central Marine Fisheries Research Institute (CMFRI) at Mandapam Camp, were also examined. The relevant type specimens in the British Museum Natural History (BMNH) London, National Museum of Natural History (RMNH) Leiden, were examined and, the data on types in the National Museuln of Natural History (MNHN) Paris obtained earlier (Murty, 1982) were utilised. After noting the fresh colour and piglnentation in the landing place, the specilnens were injected 50/0 fonnalin and preserved for further studies. In the laboratory, all relevant biometric data of specilnens froln different localities separately, were taken. A fier taking the biolnetric data, the belly was cut open to note the sex. In taking Ineristic and Inorphometric data, the methodology of Hubbs and Lagler (1958) was followed; all the linear measurements Vt'ere made in the median longitudinal axis (Fig. I a). Exalnination of the ridges on head and the counts of scales and fin rays were always Inade under a binocular stereozoom microscope. For uniformity, counts of pectoral rays, pelvic rays, lateral line scales and gill rakers in the first gill arch were made on the left side. Lateral line scale count represents the number of pored scales. L.tr shows the count of scales in a row from the origin of first dorsal obliquely backwards to the lateral line plus the scale in lateral line plus the scales in a row froln the anal origin obliquely forwards to the latera! line. In describing the various ridges
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