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TAXONOMIC STUDIES of CAPRELLIDS (CRUSTACEA, Title AMPHIPODA, CAPRELLIDAE) FOUND in the JAPANESE and ADJACENT WATERS

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TAXONOMIC STUDIES of CAPRELLIDS (CRUSTACEA, Title AMPHIPODA, CAPRELLIDAE) FOUND in the JAPANESE and ADJACENT WATERS TAXONOMIC STUDIES OF CAPRELLIDS (CRUSTACEA, Title AMPHIPODA, CAPRELLIDAE) FOUND IN THE JAPANESE AND ADJACENT WATERS Author(s) Arimoto, Ishitaro SPECIAL PUBLICATIONS FROM THE SETO MARINE Citation BIOLOGICAL LABORATORY (1976), 3: iii-229 Issue Date 1976-12 URL http://hdl.handle.net/2433/176456 Right Type Departmental Bulletin Paper Textversion publisher Kyoto University SPECIAL PUBLICATIONS FROM THE SETO MARINE BIOLOGICAL LABORATORY SERIES III --- ---~--------- TAXONOMIC STUDIES OF CAPRELLIDS (CRUSTACEA, AMPHIPODA, CAPRELLIDAE) FOUND IN THE JAPANESE AND ADJACENT WATERS BY ISHITARO ARIMOTO BUNKYO UNIVERSITY TOKYO DECEMBER 1976 Issued on December 31, 1976 Printed in Japan by the Nippon Printing & Publishing Co., Ltd. Osaka, Japan 111 CONTENTS Part One I. Preface 1 II. Acknowledgements ....................................................................... 2 III. Materials and methods ................................................................ .. 6 IV. General notes in the taxonomy of caprellids ...................................... 7 A. Review of studies on caprellids in the Japanese waters from 1888 to 1973 .................................................................................... 7 B. Development and sexual dimorphism................................................ 11 a. Ontogeny and sexual differentiation............................................. 11 b. Development of secondary sexual characteristics . .. .... .. ....... ...... .. .. .. 12 C. Morphological criteria at different classification levels in caprellids......... 14 a. Morphological characteristics of caprellids and their systematic significance . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 14 b. Criteria of families and subfamilies ............................................. 16 c. The generic criteria.................................................................. 18 d. The subgeneric criteria in the genus Caprella .. .. .. .. .. .. .. .. .. .. .. .. .. 19 e. The specific criteria .................................................................. 20 Part Two V. Taxonomical descriptions ............................................................... 25 A. Family Caprellidae . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 25 1) Subfamily Caprogammarinae .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 25 Genus Cercops Kroyer . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 25 1. Cercops holboelli Kroyer (Fig. 9) .......................................... 25 2) Subfamily Caprellinae ............................................................... 27 Key to genera of the subfamily Caprellinae in the Japanese waters .................................................................................. 28 Genus Protogeton Mayer .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 29 2. Protogeton injlatus Mayer (Fig. 10)....................................... 29 Genus Protomima Mayer ............................................................ 31 3. Protomima imitatrix Mayer (Figs. 11, 12) .............................. 31 *4. Protomima sp. Mayer ............... , .. ., ................................ 34 Genus Pseudoproto Mayer ............................................................ 34 5. Pseudoproto Jallax Mayer (Fig. 13) ....................................... 34 Genus Prellicana Mayer .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 35 6. Prellicana minima Mayer (Fig. 14) ....................................... 36 Genus Triperopus Mayer . 38 7. Triperopus mirus Mayer (Fig. 15) ....................................... 38 IV Contents Genus Paraprotetta Mayer . .. .. .. 39 8. Paraprotetta prima Mayer (Figs. 12, 16) ............................... 40 9. Paraprotetta secunda Mayer ................................................ 41 Genus Aciconula Mayer ............................................................... 42 10. Aciconula miranda Mayer (Fig. 17) ....................................... 42 Genus Noculacia Mayer ............................................................... 44 II. Noculacia bogisa Mayer (Fig. 18) ....................................... 44 Genus Monoliropus Mayer . 46 12. Monoliropus tener Arimoto (Fig. 19) .................................... 46 Genus Metaprotetta Mayer . 4 7 13. Metaprotella sandalensis Mayer (Fig. 20) ............................... 48 Genus Protella Dana ............................................... 0.................. 49 14. Protella gracilis Dana (Figs. 21, 22) ......... 0 ••••••••••••••••••••••••••• 50 Genus Paracapretta Mayer ............................................................ 53 15. Paracaprella crassa Mayer (Figs. 23, 24) ............................... 53 16. Paracaprella tenuis Mayer (Figs. 24, 25) .................. 0 •• 0 ••••••••• 56 Genus Hemiaegina Mayer . 58 17. Hemiaegina minuta Mayer (Figs. 26, 28) ............................... 58 Genus Metacaprella Mayer . 60 18. Metacapretta anomala (Mayer) (Figs. 27, 28) ......................... 60 Genus Capretta Lamarck . .. .. 63 Key to species of Caprella in the Japanese and adjacent waters ......... 64 a) Subgenus Capretta, sensu stricto ............................... 65 19. Caprella (Cap.) japonica (Schurin) (Figs. 29, 30) ..................... 66 20. Caprella (Cap.) venusta Utinomi (Fig. 31) ............................ 68 21. Caprella (Cap.) okadai Arimoto (Fig. 32) .............................. 70 22. Caprella (Cap.) decipiens Mayer (Figs. 33, 34, 35) ................... 72 23. Caprella (Cap.) laevis (Schurin) (Fig. 36) .............................. 76 24. Caprella (Cap.) mixta Mayer (Fig. 37) ................................. 77 25. Caprella (Cap.) gracillima Mayer (Figs. 38, 40) ...................... 78 26. Caprella (Cap.) subtilis Mayer (Figs. 39, 40) ........................... 80 27. Caprella (Cap.) iniquilibra Mayer (Figs. 41, 42) ...................... 82 28. Caprella (Cap.) simplex Mayer (Fig. 43) ............................... 84 29. Caprella (Cap.) monoceros Mayer (Figs. 42, 44) ........................ 86 30. Caprella (Cap.) eximia Mayer (Fig. 45) ................................. 88 31. Caprella (Cap.) kroyeri DeHaan (Figs. 44, 46, 47, 48) ............ 90 32. Caprella (Cap.) laeviuscula Mayer (Fig. 49) ............................ 94 33. Caprella (Cap.) imaii Utinorni (Fig. 50) ............................... 96 34. Caprella (Cap.) carinata Arimoto (Figs. 51, 52, 53) .................. 97 35. Caprella (Cap.) longidentata Arimoto (Figs. 53, 54) .................. 102 36. Caprella (Cap.) soyo Arimoto (Figs. 55, 56) ........................... 104 37. Caprella (Cap.) bispinosa Mayer (Figs. 56, 57, 58) .................. 107 38. Caprella (Cap.) mutica Schurin (Fig. 59) ............................... 111 Contents v 39. Caprella (Cap.) bidentata Utinomi (Figs. 60, 61) ..................... 112 40. Caprella (Cap.) aino Utinomi (Figs. 61, 62) ........................... 115 41. Caprella (Cap.) irregularis Mayer (Fig. 63) ............................ 116 42. Caprella (Cap.) nagaoi Arimoto (Fig. 64) .............................. 118 *43. Caprella (Cap.) sp. Mayer (Fig. 65) .................................... 119 b) Subgenus Spinicephala, n. subgen. ........................... 120 44. Caprella (Spin.) cristibrachium Mayer (Fig. 66) ........................ 121 45. Caprella (Spin.) verrucosa Boeck (Figs. 67, 68) ........................ 122 46. Caprella (Spin.) septentrionalis Kroyer (Figs. 69, 70, 71, 72) ....... 126 4 7. Caprella (Spin.) borealis Mayer (Figs. 72, 73) ......................... 135 48. Caprella (Spin.) chelimana Mayer (Fig. 74) ............................ 138 49. Caprella (Spin.) californica Stimpson (Figs. 75, 76, 77) ............. 139 50. Caprella (Spin.) scaura Templeton ....................................... 146 50-( 1). Caprella (Spin.) scaura typic a Mayer (Fig. 78) ................... 14 7 50-(2). Caprella (Spin.) scaura diceros Mayer (Figs. 79, 80, 81) ....... 148 50-(3). Caprella (Spin.) scaura hamata U tinomi (Fig. 82) ............. 155 51. Caprella (Spin.) gigantochir Mayer (Figs. 83, 84) ..................... 156 52. Caprella (Spin.) rhopalochir Mayer (Fig. 85) ........................... 159 53. Caprella (Spin.) simia Mayer (Figs. 86, 87, 88) ...................... 161 54. Caprella (Spin.) vidua Mayer (Fig. 89) ................................. 165 55. Caprella (Spin.) cilluroantennata Arimo to (Fig. 90) ................... 167 56. Caprella (Spin.) acanthogaster Mayer (Figs. 91, 92, 93) ............. 169 57. Caprella (Spin.) paulina Mayer (Fig. 94) .............................. 175 58. Caprella (Spin.) polyacantha Utinomi (Figs. 95, 96) .................. 177 c) Subgenus Rostrhicephala, n. subgen ............................ 179 59. Caprella (Ros.) drepanochir Mayer (Fig. 97) ............................ 179 60. Caprella (Ros.) algaceus Vassi1enko (Fig. 98) ......................... 181 61. Caprella ( Ros.) danilevskii Czerniavski (Figs. 99, 100, 101) ......... 183 62. Caprella (Ros.) tsugarensis Utinomi (Figs. 102, 103) ................ 189 63. Caprella (Ros.) subinermis Mayer (Figs. 104, 105) ................... 192 64. Caprella (Ros.) equilibra Say (Figs. 106, 107, 108, 109) ............. 195 65. Caprella (Ros.) obtusifrons Utinomi (Fig. 110) ........................ 205 66. Caprella (Ros.) brevirostris Mayer (Figs. 111, 112) ................... 206 67. Capretta (Ros.) penantis Leach (Figs. 113, 114, 115) ................ 209 *68. Caprella affinis Brandt .....................................................
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