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G. Distribution of the Marine Asellota

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G. Distribution of the Marine Asellota G. Distribution of the marine Asellota As part of the evaluation of the bathymetrical and eulittoral, sublittoral, bathyal, abyssal, and hadal regional distribution of bathyal and abyssal Asel- (cf. p. 16 and p. 271). lota, it was found important to compare the require- Temperature. The temperature records have been ments of the deep-sea forms, regarding distribution derived from many sources. In only very few cases and temperature, to those of the littoral asellotes. has the temperature been given by the author who However, a monographic compilation of the entire described or mentioned the species in question. tribe of Asellota is an undertaking not previously However, by scanning the station lists of the various attempted. GURJANOVA(1933b) gave a survey of expeditions it was sometimes possible to find a re- the occurrence and depth records of the Arctic and cord of the temperat~re;~even if records older than Subarctic marine isopods and a similar survey was some 50 years are not always reliable they should compiled by NIERSTRASZ(1941) for the Indo-Pacific be exact enough for biological purposes. In the isopods. There are many misprints in distribution majority of cases it was necessary to acquire infor- data in the former paper, and the latter paper is by mation on temperatures from hydrographical data no means complete. In the depth records of both of other expeditions, etc., working in the same or papers the conversions from fathoms to metres are an adjacent area. almost all incorrect. Recently, MENZIES(1962b) di- Where more temperature records over a succes- agnosed most of the abyssal Atlantic isopods and sion of years were available, the maximum and mini- will discuss their distribution at a later date. mum temperatures or the maximum and minimum A compilation of the distribution, etc. of all the mean temperatures have been chosen. For species subspecies, species, and genera of marine asellotes recorded from one locality only and occurring on (Stenetrioidea, Parastenetrioidea, and Paraselloidea) the shelf (littorally), the range between the average is presented in Tables 18 and 20, and the following summer and winter temperatures is given. For spe- considerations on bathymetrical and regional distri- cies known from more than one locality, the mini- bution and temperature requirements are based on mum and maximum temperatures are listed. For all these data. species occurring at moderate depths and recorded from more than one locality, the highest possible Explanation to Table 18 temperature for the coldest month is also given (in Names. The scientific names are based on all the de- parenthesis). a (Text continued p. 270). scriptions and later revisions that I am familiar with (including those in the Systematic Part of the present 1. It goes without saying that, if at all possible, information paper). In some cases, suggestions to alter names on temperature (and other data of ecological significance) have not been followed. It was found unnecessary should always be given by the author. 2. Temperature records were taken from the following to include the first description of all the species men- sources: Navy Hydrographic Office (1958); USSING(1934); tioned in Table 18, and all the genera in Table 20 RIIS-CARSTENSEN(1 936) ; KNUDSEN(1 899) ; Meteorological in the list of references. Office (1 949) ; NYBELIN(1 95 1) ; BOHNECKE& DIETRICH Geographic distribution. This is indicated by re- (1951); Koninklijk Nederlands Meteorologisch Institut ference to geographical names of islands, states, (1957); NIEL~EN(1912); ZENKEVICH(1957); WUST& DE- FANT (1936) ; SCHOTT(1926); SEWELL(1935); POSTMA continents, etc. rather than to specified areas of the (1958); VAN RIEL (1956) ; WOOSTER& VOLKMANN(1960) ; oceans or by indications of the longitude and lati- Japan Meteorological Agency (1959); Department of tude (except in a few species occurring far from Oceanography, University of Washington (1956); Scripps land). The more northern and western occurrences Institution (1949, 1956, 1960); GUNTHER(1936); BRATT- are mentioned first. In several widely distributed STROM & DAHL(1951); SCHOTT(1935); Discovery Reports, Lists of Stations; DEACON(1937); DRYGALSKI(1927); species (especially from the Arctic Ocean and North MACKINTOSH(1946); SCHOTT(1902); U. S. Navy Hydro- Atlantic) only localities furthest to points N.W., graphic Office (1944, 1957) ; SCHMIDT(1929) ; THOMSEN N. E., S. W., and S. E. have been given. (1937); SVERDRUPet al. (1942); BRUNS(1958). (The latter contains useful examples of hydrographic data from sea Deuth.1 For the sake of conformity and comoari- son with a similar survey of the genera (~~bl~20) areas around the Russian coasts, these data being origin- ally published in Russian Journals which were not avail- it was found necessary for 'pecies7 the able). - Moreover, Mr. JE~sS~D of fie Hydrographic exact of m, 200 m, 2000 m7 6000 as Office who also helped with references, placed the large Table 18. Regional and bathymetrical distribution. range of temperature. length of body. and number of finds of all species and subspecies of Asellota (excl . of Aselloidea). arranged strictly according to depth limits . * Indicates species which it would be more natural to range in other depth zones (cf . the lists p .271) . For further explanation. see p . 248 . -.... Serial Depth Temperature Body length No. of Name Locality No . 1 (in m) 1 (in "c.) / (in mm) localities I. STENETRIOIDEA A . 0-4 METRES Stenetrium armatum Haswell. 1881 ........ S. E . Australia ........ Eulitt . Stenetrium bartholomei Barnard. 1940 ..... S. Africa ............. Eulitt . Stenetrium crassimanw Barnard. 1914 ...... S . Africa ............. Eulitt. Stenetrium diazi Barnard. 1920 ........... S. Africa ............. Eulitt . Stenetrium entale Nordenstam. 1946 ....... Gilbert Is............. Eulitt . Stenetrium fractum Chilton. 1883 ......... S. New Zealand ...... Eulitt . Stenetrium gilbertense Nordenstam. 1946 ... Gilbert 1s............. Eulitt . Stenetrium glauerti Nicholls. 1929 ......... W . Australia .......... Eulitt . Stenetrium hanseni Nobili. 1906 ........... Tuamotu Is........... Eulitt . Stenetrium macrochirum Nicholls. 1929 ..... W . Australia .......... Eulitt . Stenetrium medipacijicum Miller. 1941 ..... Hawaii .............. Eulitt. Stenetrium monodi Nordenstam. 1946 ..... Gulf of Suez ......... Eulitt . Stenetrium occidentale Hansen. 1905 ...... W . Indies ............ Eulitt . Stenetrium proximum Nobili. 1907 ........ Tuamotu Is ........... Eulitt . Stenetrium serratum Hansen. 1905 ......... W . Indies ............ Eulitt . Stenetrium spinirostrum Nicholls. 1929 ..... W . Australia ......... Eulitt . Stenetrium stebbingi Richardson. 1902 ..... Bermudas ........... Eulitt. Stenetrium syzygus Barnard. 1940 ......... S. Africa ............. Eulitt . Stenetrium truncatum Nicholls. 1929 ....... W . Australia .......... Eulitt . Stenetrium chiltoni Stebbing. 1905 ........ Ceylon; Amirante Is.. Gilbert Is ........... 0-62 B . ?O-200 METRES 21 Stenetrium antillense Hansen. 1905 ........ W . Indies ............ ? < 200 ?20-25 4.5 1 C. 4-200 (20-110) METRES 22 Stenetrium euchirum Nobili. 1906 .......... Tuamotu Is ........... 20 23 Stenetrium longicorne (Lucas. 1849) ....... W . Mediterranean; Atlantic Morocco ... 23-1 10 24 Stenetrium siamense Hansen. 1905 ......... Gulf of Siain ......... 28-72 D . 4-6000 (150-3400) METRES 25* Stenetrium acutum Vanhoffen. 1914 ....... Antarctic Indian Ocean 150-3397 E . 200-2000 (230-1100) METRES 26 Steizetrium dagama Barnard. 1920 ......... S. Africa ............. 348-421 27 Stenetrium dalmeida Barnard. 1920 ........ S. Africa ............. 247-421 28 Stenetrium haswelli Beddard. 1886 ......... Off N . Argentine ...... 1097 29 Stenetrium rotundatum Vanhoffen. 1914 .... Antarctic Indian Ocean 385 30 Stenehium saldanha Barnard . 1920 ........ S. Africa ............. 229-247 F. 2000-6000 (4500) METRES 31 Stenetrium abyssale n . sp ................. Tasman Sea; Kermadec Trench ............ 4510-4540 I1 . BARASTENETRIOIDEA 32 Gnathostenetroides laodicense Amar. 1957 .. E . Mediterranean ..... 2-4 Serial Depth Temperatitre Body length No. of Name Locality No. I / (in m) (in T.) / (in mm) i~oca~itie~ 111. PARASELLOIDEA I. Freshwater (or preferably so) (Fr. = only freshwater; Br. = also brackish water; (Ma.) = (rarely) also marine) JANIRIDAE 33 Heterias exul (Miiller, 1892) .............. Brazil ............... Fr. 34 Heterias pusilla (Sayce, 1900) ............. Victoria, Australia .... Fr. 35 Jaera italica Kesselyak, 1938.. ............ Sicily; Jugoslavia; Greece. ............ Fr. ; Br. ; (Ma.) 36 a Jaera nordmanni nordmanni (Rathke, 1837) . Black Sea; Mediterra- nean; Azores ....... Fr.; Ma. 36b Jaera nordmanni nordica Lemercier, 1958' . N. W. France; British Isles ............... Fr. ; Br. - 14 37a Jaera sarsi sarsi Valkanov, 1936 .......... Rivers to the Black Sea Fr. 8 many 37b Jaera sarsi caspica Kesselyak, 1938 ........ Caspian Sea; Volga; Ural ............... Fr.; Br. - (>I5 38 Jaera schellenbergi Kesselyak, 1938 ........ Jugoslavia ............ Fr.; (Ma.) 2.7; 2.3 2 39 Mackinia japonica Matsumoto, 1956. ...... Japan ............... Fr. 4 several 40 Microcharon acherontis Chappuis, 1943 .... Roumania; Hungaria . Fr. 2 2 41 a Microcharon latus latus (Karaman, 1933) . Jugoslavia ............ Fr. 1.55 4 41 b Microcharon latusprespensis Krm., 1954% .. ? Jugoslavia .......... ? Fr. - ? 1 42 Microcharon major Karaman, 1954 ........ Jugoslavia. ........... Fr. - 3 43 a Microcharon profundalis profundalis Krm., 1940 ................................
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