Revision of three species of Terebellides (Polychaeta: Trichobranchidae) described by C. Hessle in 1917 from the Southern Ocean Author Parapar, Julio Author Moreira, Juan text Journal of Natural History 2008 2008-05-31 42 17 - 18 1261 1275 http://dx.doi.org/10.1080/00222930801989997 journal article 10.1080/00222930801989997 1464-5262 5219250 Terebellides minutus Hessle, 1917 Hessle 1917:138–139 , plate I, figure 16, Textfigure 29; Monro 1930:198 , figure 83; Hartman 1953:11 . Type material Swedish Museum of Natural History , Stockholm : SMNH 542 ( TYPE , South Georgia , Cumberland Bay , the inlet of Westfjord , 250 m depth , 54 ° 15 9 S , 36 ° 25 9 W , loose clay, SSPE 1901–03 , st. 18; one spec. ), SMNH 6642 ( SSPE st. 18; 1 spec. ), SMNH 6643 ( SSPE , st. 18; three specs.), SMNH 6644 ( South Georgia , Cumberland Bay , 250 m depth , 54 ° 12 9 S , 36 ° 50 9 W , clay, algae; SSPE st. 20; five specs.), SMNH 6645 ( SSPE st. 20; one spec. ), SMNH 6646 ( SSPE st. 20; three specs.), SMNH 6647 ( SSPE st. 20; five specs.), SMNH 6648 ( South Georgia , off May Bay , 75 m depth , 54 ° 17 9 S , 36 ° 28 9 W , clay, algae; SSPE st. 22; 13 specs.), SMNH 6649 ( SSPE st. 22; two specs.), SMNH 6650 ( SSPE st. 22; two specs.), SMNH 6651 ( South Georgia , outside the mouth of Moränenfjord, 64–74 m depth , 54 ° 23 9 S ; 36 ° 26 9 W , grey clay with gravel and stones; SSPE st. 23; 17 specs.), SMNH 6652 ( South Georgia , Cumberland Bay , outside Grytviken, 95 m depth , 54 ° 22 9 S , 36 ° 27 9 W , clay; SSPE st. 24; 33 specs.), SMNH 6653 ( SSPE st. 24; one spec. ), SMNH 6654 ( SSPE st. 24; seven specs.), SMNH 6655 ( SSPE st. 24; one spec. ), SMHN 6656 ( SSPE st. 24; three specs.) . Reported distribution Patagonia ( Hessle 1917 ; Hartman 1953 ) and South Georgia , Antarctica ( Monro 1930 ). Remarks Hessle (1917:138) distinguishes T. minutus from T. kerguelensis only on the basis of the shape of the thoracic and abdominal uncini. These differences are, however, not clearly explained in the original description and accompanying drawings. Here, examination of a large number of specimens preserved in good condition from SMNH showed that distinction of the two species based on shape of uncini cannot be maintained thus confirming that T. minutus and T. kerguelensis are the same species. Syntypes measured between 0.9 and 3.5 cm in length and numbers of thoracic and abdominal uncini have little variation among individuals. On the other hand, the number of thoracic chaetigers ranges from 13 to 15 in large individuals and between 9 and 10 in smaller ones whereas the number of abdominal chaetigers is 33– 35 and 28–29, respectively. In addition, dorsal and ventral branchial lobes have a pointed papillar projection located on the posterior face.