Notes on Metaphiremultitheca (Chen, 1938) (Oligochaeta, Megascolecidae) recorded from Vietnam, with descriptions of two new species Author Nguyen, Anh D. Author Nguyen, Tung T. text ZooKeys 2015 506 127 136 http://dx.doi.org/10.3897/zookeys.506.9550 journal article http://dx.doi.org/10.3897/zookeys.506.9550 1313-2970-506-127 AD1565A529414D94B95A3288FB0D9391 Taxon classification Animalia Opisthopora Megascolecidae Genus Amynthas Kinberg, 1867 Amynthas Kinberg, 1867: 97 et Amyntas (laps. praeocc.) pg. 101. Amyntas (part) - Beddard 1900a : 612. Nitocris Kinberg, 1867: 102 (praeocc.). Pheretima - Michaelsen 1900 : 234. Perichaeta (part praeocc.) - Beddard 1895 : 388. Promegascolex Cognetti, 1922 (part see Blakemore et al. 2007 ) Pheretima (Pheretima) (part) - Michaelsen 1928 : 8; Michaelsen 1934 : 15. Amynthas - Sims and Easton 1972 : 211; Blakemore 2002 : 149, 2007 , 2008 . Type species. Amynthas aeruginosus Kinberg, 1867, by monotypy. Distribution. Widely distributed in the Oriental region, and also found in Australasian and Oceanian regions ( Sims and Easton 1972 ) and distributed worldwide ( Blakemore 2002 , 2007 ). Remarks. Members of the genus can be easily recognized by the presence of intestinal caeca near xxvii, the absence of copulatory pouches, and often by absence of micronephridia on spermathecal ducts. It is noted that about 500+ nominal species have been recorded, but a considerable number are likely synonyms ( Blakemore 2002 , 2007 ).