Amynthas hatomajimensis (Ohfuchi, 1957)

Blakemore, Robert J., 2013, 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), Journal of Species Research 2 (2), pp. 99-126 : 112

publication ID	https://doi.org/ 10.12651/JSR.2013.2.2.099
DOI	https://doi.org/10.5281/zenodo.13144639
persistent identifier	https://treatment.plazi.org/id/03CA8049-FFA4-FFFE-358F-F87E5C86FE46
treatment provided by	Felipe
scientific name	Amynthas hatomajimensis (Ohfuchi, 1957)
status

Treatment

Amynthas hatomajimensis (Ohfuchi, 1957) View in CoL

Pheretima hatomajimensis Ohfuchi, 1957: 245 View in CoL , 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.