Amynthas yamizoyamensis ( Ohfuchi, 1935 )

Blakemore, Robert J., 2012, New earthworm species from NIBR’s Jeju-do biosphere compared to historical and new Japanese types (Oligochaeta: Megadrilacea: Megascolecidae), Journal of Species Research 1 (2), pp. 133-150 : 145

Amynthas yamizoyamensis ( Ohfuchi, 1935)

[ Fig. 9 ].

Pheretima yamizoyamensis Ohfuchi, 1935: 413 , figs. 6- 10. Mt. Yamizo , Japan. Types?

Amynthas yamizoyamensis : Blakemore, 2010a: 193 (syn.? conformis).

Note. Name sometimes misspelt “yamijoyamensis” or “yamizoyamaensis”.

Material examined. None-fate and location of the original four syntypes unknown.

Description. Pinkish grey colour. Length, 136-177 mm, segments 117-136. Setae 25-48. Spermathecae in 5/6/7/ 8/9. GMs large paired in 17/18. Male pores, superficial but “elevated” and separated by 7-10 setae. Presence of septa 8/9/10 unrecorded. Spermathecal diverticula variable as short stalks to long coiled ducts. Seminal vesicles in 11 and 12. Intestine from 15, caeca simple from 28.

Distribution. Mt Yamizo (1022 m) lies in three prefectures: Fukushima, Ibaragi and Tochigi. A similar if not conspecific Yamanashi-ken specimen (14/2/2003) is 10

15 also in YNU collection although its caeca are slightly incised ventrally.

Remarks. The question of restoration from Easton’s (1981: 55) synonymy in A. micronarius mooted by Blakemore (2010a: 193) is here supported.

Figures

Fig. 9. Amynthas yamizoyamensis after Ohfuchi’s (1935: figs. 6- 10) originals.