Megascolex (Perichaeta) diffringens Baird, 1869 and Pheretima pingi Stephenson, 1925 types compared to the Amynthas corticis (Kinberg, 1867) and A. carnosus (Goto & Hatai, 1899) species-groups (Oligochaeta: Megadrilacea: Megascolecidae) Author Blakemore, Robert J. text Journal of Species Research 2013 2013-08-31 2 2 99 126 http://dx.doi.org/10.12651/jsr.2013.2.2.099 journal article 10.12651/JSR.2013.2.2.099 2713-8615 Amynthas hatomajimensis (Ohfuchi, 1957) Pheretima hatomajimensis Ohfuchi, 1957: 245 , fig. 20. [ From Ryukus , Japan . Types ?]. Diagnosis. Length 73-94 mm by 3-4.5 mm with 75-93 segments. Spermathecal pores in 5/6/7/8/9. GM in a cross-shape internal to, above and below male pores on 18, plus another pair anteriomedian and postsetally on 18. Intestinal caeca simple in 26. Distribution. Hatoma-jima island, Ryukus. Collected 1 st April, 1936. Remarks. Said to resemble A. pingi its lack of spermathecal papillae and cross-shaped GMs indicate its propable separation from both A. corticis / diffringens and A. carnosus / pingi although combined as a possible synonym of A. corticis by Easton (1981: 49-50) . Now separated is Metaphire yamadai (Hatai, 1930) that has spermathecae in 6/7/8/9 and possibly includes A. pectiniferus (Michaelsen, 1931) both of which Gates (1935 ; 1939 ) implicated in P. pingi as discussed in Blakemore (2012a) . However, similar taxa now are A. hongkongensis (Michaelsen, 1910) from China and A. cruxus Tsai & Shen in Tsai, Shen, Tsai and Lee, 2007: 357 from Taiwan that seem to belong to the A. corticis group and similar to current Incheon specimens of A. corticis and so these taxa should be reevaluated.