Siriella thompsonii Milne Edwards 1837
Siriella thompsonii (Milne Edwards, 1837) (Figures 19, 20) Cynthia sp. Thompson, 1829: 55, pl. vi. Cynthia Thompsoni Milne-Edwards, 1837: 462. Siriella vitrea Dana, 1852: 656, pl. 43, figs 6 a–m. — Czerniavsky, 1887: 28 Siriella breviceps Dana, 1852: 658, pl. 44, fig. 1 a–q. Cynthia inermis Krøyer,...
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Biodiversity Taxonomy Animalia Arthropoda Malacostraca Mysida Mysidae Siriella Siriella thompsonii |
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Biodiversity Taxonomy Animalia Arthropoda Malacostraca Mysida Mysidae Siriella Siriella thompsonii Talbot, Suzette Siriella thompsonii Milne Edwards 1837 |
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Biodiversity Taxonomy Animalia Arthropoda Malacostraca Mysida Mysidae Siriella Siriella thompsonii |
description |
Siriella thompsonii (Milne Edwards, 1837) (Figures 19, 20) Cynthia sp. Thompson, 1829: 55, pl. vi. Cynthia Thompsoni Milne-Edwards, 1837: 462. Siriella vitrea Dana, 1852: 656, pl. 43, figs 6 a–m. — Czerniavsky, 1887: 28 Siriella breviceps Dana, 1852: 658, pl. 44, fig. 1 a–q. Cynthia inermis Krøyer, 1861: 44, tab. 2, fig 6 a–g. Promysis galatheae Krøyer, 1861: 59, pl. 2, figs 8 a–h. Siriella Edwardsii Claus, 1868: 271, pl. 18. Siriella (Siriellides) indica Czerniavsky, 1882: 103, table XXXI, figs 1–6. ? Siriella suluhensis Czerniavsky, 1882: 108. — Muller, 1993: 43. — Panampunnayil, 1995: 1945 (table). — Fukuoka & Murano, 2002: 89 (key). Siriella thompsonii . — Filhol, 1885: 1. — Ortmann, 1893: 23. — Ortmann, 1894: 107. — Calman, 1901: 24. — Thiele, 1905: 4477, figs 7–8. —Ortmann, 1906: 971. — Hansen, 1910: 31. — Hansen, 1912: 192. —W.M. Tattersall, 1912: 122. — Hansen, 1913: 9. — W.M. Tattersall, 1914: 870. — Zimmer, 1914: 386. — Zimmer, 1916: 61. — Colosi, 1919: 5. — Colosi, 1922: 13. — W.M. Tattersall, 1923: 280. — W.M. Tattersall, 1926: 9. —Colosi, 930: 983. — Illig, 1930: 419. — Coifmann, 1936: 21, pl. VIII, fig. 12 a–e, pl. IX, fig. 12 f–g. — W.M. Tattersall, 1936 a: 145. — W.M. Tattersall, 1936 b: 279. — Coifmann, 1937: 2. — W.M. Tattersall, 1939: 234. — O.S. Tattersall, 1955: 84. — Gordan, 1957: 381. — O.S. Tattersall, 1962: 223. — Pillai, 1973: 38, figs 10,11. — Mauchline & Murano, 1977: 77. —McWillliam & Phillips, 1983: Plate 2. — Fenton, 1985: 37, 48 (key). — Lowry & Stoddart, 2003: 468. — Yerman & Lowry, 2007: interactive key. Protosiriella thompsonii . — Czerniavsky, 1887: 27. Heterosiriella galathae. — Czerniavsky, 1887: 39. Siriella thompsoni . — Coifmann, 1936: 21, pl. VIII, figs 12 a–e, pl. IX figs 12 f–g. — W.M. Tattersall, 1951: 60. — O.S. Tattersall, 1961: 147. — Birstein& Tchindonova, 1962: 65. —da Costa, 1964: 3. — Ii, 1964: 62, figs 14, 15. — Pillai, 1965: 1693, fig. 19. — Carleton & Hamner, 1989: 464, table 1. Type material. HOLOTYPE: Locality not known (assumed lost). Type locality. Central Atlantic Ocean between Madeira and the West Indies. Material examined. 6 specimens, plankton tow, near surface, 2–4 km E. of Yonge Reef, 1930 hrs Dec. 1 1978 (J.P. 78.3) AM P 74063. Size range: 2 males, 7.2 & 7.4 mm. 1 immature female, 5.2 mm. 3 juveniles, 2.9-3.2 mm. Description. Head: eyes stalked, cornea hemispherical, large (diameter of adult male cornea 0.6 mm), colour dark red-brown. Rostrum triangular, acutely pointed, carapace with cervical groove (Fig. 19 A). Antennal scale narrow (length 5.5 x width), slightly shorter than antennular peduncle, apical suture present, apical lobe small, spine towards distal end of lateral margin (Fig. 19 B). Labrum with prominent anterior medial spiniform process (about 0.5 length of labrum proper) (Fig. 19 C). Mandibular palps with expanded proximal article (Fig. 19 D). Palp of maxillary endopod fairly elongate and narrow (Fig. 19 E). First thoracic somite fused with head, endopod of 1 st thoracic limb broad, forming a gnathopod, dactylus terminating in a strong nail, epipodite leaf-like (Fig. 19 F). Pereon: second thoracic limb with moderately robust, setose endopod, functioning as a gnathopod, exopod natatory (Fig. 19 G), thoracic limbs 3–8 forming pereopods, endopods slender, exopods natatory, genital organ at base of 8 th thoracic limb in males (Fig. 20 A). Pleon: male pleopods 2–5 all similar, biramous, with spirally coiled pseudobranchial rami, simple plumose setae, none forming a distal armature (Fig. 20 B). Tail fan with uropodal exopod shorter than endopod, proximal article of exopod with 3 or 4 graded robust setae at distal angle of outer margin, uropodal endopod with 76–78 robust setae on inner margin (Fig. 20 C), telson fairly narrow, linguiform, with 2 stout l robust setae on each side of base, 18 graded robust setae on each lateral margin, distal border with 2 long robust setae on each side of 3 minute central apical setae and 2 delicate plumose setae (Fig. 20 D). Remarks. Pillai (1973) has discussed the considerable intraspecific variation observed in S. thompsonii and suggested that it might be evidence of subspeciation. The specimens taken in the Lizard Island region most closely resemble those examined by Ii (1964) from the waters off Japan and the East China Sea and Yellow Sea. Associated mysid species. The 8 other mysid species taken in the same sample as S. thompsonii included 17 specimens of S. gracilis , a species generally found with S. thompsonii, as recorded by Pillai (1973). Habitat. Pelagic in warm and temperate oceanic waters. Evidence discussed by Ii (1964) suggests that S. thompsonii moves into the surface waters at night and migrates into deeper layers during the day. Distribution. S. thompsonii is an epi-pelagic species with a world-wide oceanic distribution in warm and temperate regions. According to Pillai (1973) it is the most widely distributed mysid in oceanic waters. It is known from the north-eastern region of Australia, in the Great Barrier Reef at Low Isles (W.M. Tattersall 1936 a) and at Davies Reef (Carleton & Hamner 1989). It has also been taken in New South Wales coastal water (McWilliam & Phillips 1983) and off the west coast of Western Australia (Pillai 1973). In the Lizard Island area, 6 specimens were caught offshore at night in a plankton haul in open water 2–4 km E of Yonge Reef. FIGURE 19. Siriella thompsonii (Milne Edwards, 1837). A, cephalothorax (male, 7.4 mm). B, right antenna (male). C, labrum. D, left mandible. E, maxillules, with paragnath and left maxilla. F, left 1 st thoracic endopod and epipodite. G, left 2 nd thoracic limb. Scalebars = A: 0.5 mm; B–G: 0.2 mm. FIGURE 20. Siriella thompsonii (Milne Edwards, 1837). A, left 8 th thoracic limb (male). B, left 3 rd pleopod (male). C, endopod of left uropod. D, telson and right uropod. Scalebars = A–D: 0.2 mm. : Published as part of Talbot, Suzette, 2009, A survey of Mysida from the Lizard Island area, Great Barrier Reef, Australia, Subfamily Siriellinae (Crustacea, Mysida, Mysidae), pp. 1-49 in Zootaxa 2114 on pages 30-33, DOI: 10.5281/zenodo.187927 : {"references": ["Milne Edwards, H. (1837) Histoire Naturelle des Crustaces, comprenant l'anatomie, la physiologie et la classification de ces animaux. Roret, Paris, 2, 531.", "Thompson, J. V. (1829) On the luminosity of the ocean. Zoological researches and illustrations, No. 2, Mem. 3, 37 - 61, pls. 5 - 8.", "Dana, J. D. (1852) Crustacea, part 1. United States Exploring Expedition during the years 1838 - 1842, under the command of Charles Wilkes, U. S. N., 13, 1 - 685.", "Czerniavsky, V. (1887) Monographia Mysidarum inprimis imperii rossici (marinum, lacustrum et fluviatilium). Fascicle 3. Travaux de la Societe imperiale des Naturalistes de St. Petersbourg, 18, 1 - 102, pls. 5 - 32.", "Kroyer, H. N. (1861) Et bidrag til Kundskab om Krebsdyrfamilien Mysidae. Naturhistorie Tidsskrift, Copenhagen, Series 3, 1, 1 - 75, 2 pls.", "Claus, C. (1868) Ueber die Gattung Cynthia als Geschlechtsform der Mysideengattung Siriella. Zeitschrift fur wissenschaftlichen Zoologie, 18, 271 - 279.", "Czerniavsky, V. (1882) Monographia Mysidarum inprimis imperii rossici (marinum, lacustrum et fluviatilium). Fascicle 1. Travaux de la Societe imperiale des Naturalistes de St. Petersbourg, 12, 1 - 170, 16 pls.", "Muller, H. G. (1993) World Catalogue and Bibliography of the Recent Mysidacea. Laboratory for Tropical Ecosystems Research and Information Service, Wetzlar, Germany, 491.", "Panampunnayil, S. U. (1995) Two new species of Siriella (Crustacea-Mysidacea) from the southwest coast of Australia. Journal of Plankton Research, 17 (10), 1939 - 1950.", "Fukuoka, K. & Murano, M. (2002) Mysidae (Crustacea) from the south-eastern Andaman Sea with descriptions of six new species. Phuket Marine Biological Centre Special Publication, 23, 53 - 108.", "Filhol, H. (1885) La vie au fond des mers. Paris, i - viii, 1 - 301, 96 figs., 8 pls.", "Ortmann, A. (1893) Decapoden und Schizopoden der Plankton-Expedition. Ergebnisse der Plankton-Expedition der Humboldt-Stiftung, 2, 1 - 120, 1 fig., 7 pls.", "Ortmann, A. (1894) Report on the dredging operations off the west coast of Central America to the Galapagos, to the west coast of Mexico and in the Gulf of California, by the U. S. Fish Commission steamer Albatross during 1891, Lieut. Commander Z. L. Tanner, U. S. N. commanding, XIV: The pelagic Schizopoda. Bulletin of the Museum of Comparative Zoology, 25 (8), 99 - 111, 1 pl.", "Calman, W. T. (1901) A catalogue of Crustacea and of Pycnogonida contained in the Museum of the University College, Dundee. Edited by D'Arcy Wentworth Thompson. Dundee.", "Thiele, J. (1905) Ueber einige Stielaugige Krebse von Messina. Zoologische Jahrboeken Supplement, 8, 443 - 474, 3 pls.", "Hansen, H. J. (1910) The Schizopoda of the Siboga Expedition. Siboga-Expeditie, 37, 1 - 123, pls. 1 - 16.", "Hansen, H. J. (1912) Reports on the scientific results of the expedition to the eastern tropical Pacific, in charge of Alexander Agassiz, by the U. S. Fish Commission Steamer \" Albatross, \" from October, 1904, to March, 1905, Lieut. Commander L. M. Garrett, U. S. N., commanding. 27. The Schizopoda. Memoirs of the Museum of Comparative Zoology at Harvard College, 35 (4), 175 - 296, 12 pls.", "Hansen, H. J. (1913) Report on the Crustacea Schizopoda collected by the Swedish Antarctic Expedition 1901 - 3, under the charge of Baron Otto Nordenskjold. Copenhagen, 1 - 46, pls. 1 - 6.", "Tattersall, W. M. (1914) Further records of Indian Brackish Water Mysidae with Description of a new Genus and Species. Records of the Indian Museum, 10, 75 - 80, 2 pls.", "Zimmer, C. (1914) Die Schizopoden der Deutschen Sudpolar-Expedition, 1901 - 3. Deutschen Sud-Polar Expedition, 15, 379 - 409, pls. 23 - 26.", "Zimmer, C. (1916) Crustacea. IV. Cumacea und Schizopoda. Beitrachten der Meeresfauna der West Africa, 2, 54 - 66.", "Colosi, G. (1919) Nota preliminare sui misidacei raccolti dalla R. N. Liguria nel 1903 - 05. Bollettino della Societa Entomologia Italiana, 49 (1917), 3 - 11.", "Colosi, G. (1922) Eufausiacei e Misidacei dello Stretto di Messina. Comitato Talassografico Italiano, 98, 1 - 22.", "Tattersall, W. M. (1923) British Antarctic (Terra Nova) Expedition, 1910; Crustacea. Part 7: Mysidacea. Natural History Reports, British Museum (Natural History), Zoology, 3 (10), 273 - 304, 4 pls.", "Tattersall, W. M. (1926) Crustacea of the order Euphausiacea and Mysidacea from the western Atlantic. Proceedings of the United States National Museum, 69 (8), 1 - 31, 2 pls.", "Illig, G. (1930) Die Schizopoden der Deutchen Tiefsee-Expedition. Deutsche Tiefsee Expedition, 22, 400 - 494, 553 - 600, 616 - 624, 173 figs.", "Coifmann, I. (1936) 1 misidacei del Mar Rosso: Studio del materiale raccolte dal Prof. L. Sanzo durante la campagna idrografica della R. Nave Ammiraglio Magnaghi (1923 - 1924). Raccolto Comitato Talassografico Italiano, 233, 1 - 52, 25 pls.", "Tattersall, W. M. (1936 a) Mysidacea and Euphausiacea. Scientific Reports of the Great Barrier Reef Expedition 1928 - 29, London, 5 (4), 143 - 176, 14 figs.", "Tattersall, W. M. (1936 b) The zooplankton. V. The occurrence and seasonal distribution of the Mysidacea and Euphausiacea. Scientific Reports of the Great Barrier Reef Expedition 1928 - 29, London, 2 (8), 227 - 289, 5 figs.", "Coifmann, I. (1937) Misidacei raccolti dalla R Corvetta Vettor Pisani negli anni 1882 - 85. Annali di Museo Zoologico della Universita di Napoli, new series, 7 (3), 1 - 14, 7 figs.", "Tattersall, W. M. (1939) The Euphausiacea and Mysidacea of the John Murray Expedition to the Indian Ocean. Scientific Reports of the John Murray Expedition, 5, 203 - 246, 21 figs.", "Tattersall, O. S. (1955) Mysidacea. Discovery Reports, 28, 1 - 190.", "Gordan, J. (1957) A bibliography of the Order Mysidacea. Bulletin of American Museum of Natural History, 112, 279 - 394.", "Tattersall, O. S. (1962) Report on a collection of Mysidacea from South Africa off-shore and coastal waters (1957 - 1959) and from Zanzibar. Proceedings of the Zoological Society of London, 139, 221 - 247.", "Pillai, N. K. (1973) Mysidacea of the Indian Ocean. In: Handbook to the International Zooplankton Collections, 4. Indian Ocean Biological Centre, Kerala State, India, 1 - 125, 64 figs.", "Mauchline, J. & Murano, M. (1977) World list of the Mysidacea, Crustacea. Journal of Tokyo University of Fisheries, 64, 39 - 88.", "McWilliam, P. S. & Phillips, B. F. (1983) Study of phyllosoma larvae and other crustacean macrozooplankton associated with eddy J, a warm core-eddy off south-eastern Australia. Australian Journal of Marine and Freshwater Research, 34, 653 - 663.", "Fenton, G. E. (1985) Ecology and Taxonomy of the mysids of Australia (Mysidacea: Crustacea). Ph. D. thesis, University of Tasmania, Hobart, 1 - 366.", "Lowry, J. K. & Stoddart, H. E. (2003) Crustacea: Malacostraca: Syncarida, Peracarida. In Houston, W. W. K. & Wells, A. (Eds.), Zoological Catalogue of Australia, 19.2 a. CSIRO Publishing, Melbourne, Australia, 531.", "Yerman, M. N. & Lowry, J. K. (2007) Australian Mysidacea. Version 1 March 2007, http: www. crustacea. net.", "Tattersall, W. M. (1951) A review of the Mysidacea of the United States National Museum. Bulletin of the United States National Museum, 201, 1 - 292.", "Tattersall, O. S. (1961) Mysidacea from the coast of tropical West Africa. Atlantide Report, 6, 143 - 159.", "Birstein, J. A. & Tchindonova, J. G. (1962) Mysidacea collected by the Soviet Antarctic Expedition on the M / V \" Ob \". Biological reports of the Soviet Antarctic Expedition (1955 - 1958), 1, 58 - 68.", "Costa, H. R. da (1964) Notas sobre os Mysidacea da Costa brasileira. Boletim do Museu Nacional Brasil, New Series, Zoologia, 247, 1 - 9.", "Ii, N. (1964) Fauna Japonica, Mysidae (Crustacea). Biogeographical Society of Japan, National Science Museum, Uyeno Park, Taito-ku, Tokyo, Japan, 1 - 610, 154 figs.", "Pillai, N. K. (1965) A review of the work on the shallow water Mysidacea of the Indian waters. In: Symposium on Crustacea, 5. Marine Biological Association of India, 1681 - 1728.", "Carleton, J. H. & Hamner, W. M. (1989) Resident mysids: community structure, abundance and small-scale distributions in a coral reef lagoon. Marine Biology, 102, 461 - 472."]} |
format |
Text |
author |
Talbot, Suzette |
author_facet |
Talbot, Suzette |
author_sort |
Talbot, Suzette |
title |
Siriella thompsonii Milne Edwards 1837 |
title_short |
Siriella thompsonii Milne Edwards 1837 |
title_full |
Siriella thompsonii Milne Edwards 1837 |
title_fullStr |
Siriella thompsonii Milne Edwards 1837 |
title_full_unstemmed |
Siriella thompsonii Milne Edwards 1837 |
title_sort |
siriella thompsonii milne edwards 1837 |
publisher |
Zenodo |
publishDate |
2009 |
url |
https://dx.doi.org/10.5281/zenodo.6219091 https://zenodo.org/record/6219091 |
long_lat |
ENVELOPE(-64.456,-64.456,-65.688,-65.688) ENVELOPE(-64.150,-64.150,-84.550,-84.550) ENVELOPE(-55.966,-55.966,-63.483,-63.483) ENVELOPE(161.917,161.917,-74.333,-74.333) |
geographic |
Antarctic Galapagos Pacific Indian Lizard Island Lowry Dundee Fenton |
geographic_facet |
Antarctic Galapagos Pacific Indian Lizard Island Lowry Dundee Fenton |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://publication.plazi.org/id/6F12E3222C54FFAF1E6F5F3EFF8DFFE2 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5281/zenodo.187927 http://publication.plazi.org/id/6F12E3222C54FFAF1E6F5F3EFF8DFFE2 https://dx.doi.org/10.5281/zenodo.6219090 https://zenodo.org/communities/biosyslit |
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Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC0 |
op_doi |
https://doi.org/10.5281/zenodo.6219091 https://doi.org/10.5281/zenodo.187927 https://doi.org/10.5281/zenodo.6219090 |
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ftdatacite:10.5281/zenodo.6219091 2023-05-15T13:31:18+02:00 Siriella thompsonii Milne Edwards 1837 Talbot, Suzette 2009 https://dx.doi.org/10.5281/zenodo.6219091 https://zenodo.org/record/6219091 unknown Zenodo http://publication.plazi.org/id/6F12E3222C54FFAF1E6F5F3EFF8DFFE2 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5281/zenodo.187927 http://publication.plazi.org/id/6F12E3222C54FFAF1E6F5F3EFF8DFFE2 https://dx.doi.org/10.5281/zenodo.6219090 https://zenodo.org/communities/biosyslit Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess CC0 Biodiversity Taxonomy Animalia Arthropoda Malacostraca Mysida Mysidae Siriella Siriella thompsonii article-journal ScholarlyArticle Taxonomic treatment Text 2009 ftdatacite https://doi.org/10.5281/zenodo.6219091 https://doi.org/10.5281/zenodo.187927 https://doi.org/10.5281/zenodo.6219090 2022-04-01T11:56:18Z Siriella thompsonii (Milne Edwards, 1837) (Figures 19, 20) Cynthia sp. Thompson, 1829: 55, pl. vi. Cynthia Thompsoni Milne-Edwards, 1837: 462. Siriella vitrea Dana, 1852: 656, pl. 43, figs 6 a–m. — Czerniavsky, 1887: 28 Siriella breviceps Dana, 1852: 658, pl. 44, fig. 1 a–q. Cynthia inermis Krøyer, 1861: 44, tab. 2, fig 6 a–g. Promysis galatheae Krøyer, 1861: 59, pl. 2, figs 8 a–h. Siriella Edwardsii Claus, 1868: 271, pl. 18. Siriella (Siriellides) indica Czerniavsky, 1882: 103, table XXXI, figs 1–6. ? Siriella suluhensis Czerniavsky, 1882: 108. — Muller, 1993: 43. — Panampunnayil, 1995: 1945 (table). — Fukuoka & Murano, 2002: 89 (key). Siriella thompsonii . — Filhol, 1885: 1. — Ortmann, 1893: 23. — Ortmann, 1894: 107. — Calman, 1901: 24. — Thiele, 1905: 4477, figs 7–8. —Ortmann, 1906: 971. — Hansen, 1910: 31. — Hansen, 1912: 192. —W.M. Tattersall, 1912: 122. — Hansen, 1913: 9. — W.M. Tattersall, 1914: 870. — Zimmer, 1914: 386. — Zimmer, 1916: 61. — Colosi, 1919: 5. — Colosi, 1922: 13. — W.M. Tattersall, 1923: 280. — W.M. Tattersall, 1926: 9. —Colosi, 930: 983. — Illig, 1930: 419. — Coifmann, 1936: 21, pl. VIII, fig. 12 a–e, pl. IX, fig. 12 f–g. — W.M. Tattersall, 1936 a: 145. — W.M. Tattersall, 1936 b: 279. — Coifmann, 1937: 2. — W.M. Tattersall, 1939: 234. — O.S. Tattersall, 1955: 84. — Gordan, 1957: 381. — O.S. Tattersall, 1962: 223. — Pillai, 1973: 38, figs 10,11. — Mauchline & Murano, 1977: 77. —McWillliam & Phillips, 1983: Plate 2. — Fenton, 1985: 37, 48 (key). — Lowry & Stoddart, 2003: 468. — Yerman & Lowry, 2007: interactive key. Protosiriella thompsonii . — Czerniavsky, 1887: 27. Heterosiriella galathae. — Czerniavsky, 1887: 39. Siriella thompsoni . — Coifmann, 1936: 21, pl. VIII, figs 12 a–e, pl. IX figs 12 f–g. — W.M. Tattersall, 1951: 60. — O.S. Tattersall, 1961: 147. — Birstein& Tchindonova, 1962: 65. —da Costa, 1964: 3. — Ii, 1964: 62, figs 14, 15. — Pillai, 1965: 1693, fig. 19. — Carleton & Hamner, 1989: 464, table 1. Type material. HOLOTYPE: Locality not known (assumed lost). Type locality. Central Atlantic Ocean between Madeira and the West Indies. Material examined. 6 specimens, plankton tow, near surface, 2–4 km E. of Yonge Reef, 1930 hrs Dec. 1 1978 (J.P. 78.3) AM P 74063. Size range: 2 males, 7.2 & 7.4 mm. 1 immature female, 5.2 mm. 3 juveniles, 2.9-3.2 mm. Description. Head: eyes stalked, cornea hemispherical, large (diameter of adult male cornea 0.6 mm), colour dark red-brown. Rostrum triangular, acutely pointed, carapace with cervical groove (Fig. 19 A). Antennal scale narrow (length 5.5 x width), slightly shorter than antennular peduncle, apical suture present, apical lobe small, spine towards distal end of lateral margin (Fig. 19 B). Labrum with prominent anterior medial spiniform process (about 0.5 length of labrum proper) (Fig. 19 C). Mandibular palps with expanded proximal article (Fig. 19 D). Palp of maxillary endopod fairly elongate and narrow (Fig. 19 E). First thoracic somite fused with head, endopod of 1 st thoracic limb broad, forming a gnathopod, dactylus terminating in a strong nail, epipodite leaf-like (Fig. 19 F). Pereon: second thoracic limb with moderately robust, setose endopod, functioning as a gnathopod, exopod natatory (Fig. 19 G), thoracic limbs 3–8 forming pereopods, endopods slender, exopods natatory, genital organ at base of 8 th thoracic limb in males (Fig. 20 A). Pleon: male pleopods 2–5 all similar, biramous, with spirally coiled pseudobranchial rami, simple plumose setae, none forming a distal armature (Fig. 20 B). Tail fan with uropodal exopod shorter than endopod, proximal article of exopod with 3 or 4 graded robust setae at distal angle of outer margin, uropodal endopod with 76–78 robust setae on inner margin (Fig. 20 C), telson fairly narrow, linguiform, with 2 stout l robust setae on each side of base, 18 graded robust setae on each lateral margin, distal border with 2 long robust setae on each side of 3 minute central apical setae and 2 delicate plumose setae (Fig. 20 D). Remarks. Pillai (1973) has discussed the considerable intraspecific variation observed in S. thompsonii and suggested that it might be evidence of subspeciation. The specimens taken in the Lizard Island region most closely resemble those examined by Ii (1964) from the waters off Japan and the East China Sea and Yellow Sea. Associated mysid species. The 8 other mysid species taken in the same sample as S. thompsonii included 17 specimens of S. gracilis , a species generally found with S. thompsonii, as recorded by Pillai (1973). Habitat. Pelagic in warm and temperate oceanic waters. Evidence discussed by Ii (1964) suggests that S. thompsonii moves into the surface waters at night and migrates into deeper layers during the day. Distribution. S. thompsonii is an epi-pelagic species with a world-wide oceanic distribution in warm and temperate regions. According to Pillai (1973) it is the most widely distributed mysid in oceanic waters. It is known from the north-eastern region of Australia, in the Great Barrier Reef at Low Isles (W.M. Tattersall 1936 a) and at Davies Reef (Carleton & Hamner 1989). It has also been taken in New South Wales coastal water (McWilliam & Phillips 1983) and off the west coast of Western Australia (Pillai 1973). In the Lizard Island area, 6 specimens were caught offshore at night in a plankton haul in open water 2–4 km E of Yonge Reef. FIGURE 19. Siriella thompsonii (Milne Edwards, 1837). A, cephalothorax (male, 7.4 mm). B, right antenna (male). C, labrum. D, left mandible. E, maxillules, with paragnath and left maxilla. F, left 1 st thoracic endopod and epipodite. G, left 2 nd thoracic limb. Scalebars = A: 0.5 mm; B–G: 0.2 mm. FIGURE 20. Siriella thompsonii (Milne Edwards, 1837). A, left 8 th thoracic limb (male). B, left 3 rd pleopod (male). C, endopod of left uropod. D, telson and right uropod. Scalebars = A–D: 0.2 mm. : Published as part of Talbot, Suzette, 2009, A survey of Mysida from the Lizard Island area, Great Barrier Reef, Australia, Subfamily Siriellinae (Crustacea, Mysida, Mysidae), pp. 1-49 in Zootaxa 2114 on pages 30-33, DOI: 10.5281/zenodo.187927 : {"references": ["Milne Edwards, H. 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