Diagnosis. Three pairs of spermathecal pores in furrows 6/7/8/9. Male pores paired on segment 18, transverse slit on top of elliptical protuberance. Genital markings absent.
Simple intestinal caeca, originating in segment 27.
Material examined. Holotype (RUMF-ZO-00018): collected from the road just after the rain under the natural forest dominated by C. sieboldii, nearby Mt. Nishime-dake, Kunigami
Village, Okinawa-jima Island, 26°48′12′′N, 128°16′22′′E, 320 m a.s.l., 4-X-1999, by Y. Azama. One paratype (RUMF-ZO-00019): collected from same locality as holotype, 15-II-1999, by Y. Azama
and K. Ishizuka. Another paratype (RUMF-ZO-00020): collected from accumulated layer of litter and humus soil on a road, path through the secondary forest of broad-leaved tree, nearby Mt.
Nago-dake, Nago city, Okinawa-jima Island 26°34′52′′N, 128°00′34′′E, 250 m a.s.l., 27-III-2015, by Y. Azama.
Description. Measurement and color: Body length 165–260 mm, width 9.9–11.5 mm in segment 13. Number of segments 75–144. Live specimens bluish-green or greenish-brown dorsally
and clitellum, light greenish-gray ventrally. Preserved specimens brown dorsally, light-gray ventrally, dark-brown clitellum.
External characters: Three pairs of spermathecal pores situated in furrows 6/7/8/9, in ventro-lateral sides, separated by a distance of ca. 1/3 body circumference. Genital
markings absent, but external markings (genital glands absent) paired, swelled serrated lip-like pad, closely and surrounded each spermathecal pores in pre-clitellar. First dorsal pore
beginning in furrow 12/13. Clitellum occupying segments 14–16. Female pore single, mid-ventrally on segment 14. Male pores paired, in segment 18, transverse slit on top of elliptical
protuberance which elongated from post-setal on segment 17 to pre-setal on segment 19, separated by a distance of ca. 1/3 body circumference. Ventral body wall between each male pores,
depressed strongly. Setal number 76–90 in segment 7, 91–112 in segment 20, 12–17 between male pores.
Internal characters: Three pairs of spermathecae in segments 7–9, ampulla consisting of an oval-shaped pouch and a short stout duct; diverticulum consisting of an oval or
sausage-shaped pouch and short slender duct. Septa absent in 8/9/10, thickened in 5/6/7/8 and greatly thickened in 10/11–12/13. Genital glands absent. Seminal vesicle small, extending in
segments 11–12. Intestine begins in segment 15. Prostate large and diverges four longitudinal lobes, extending through segments 16–22, short ducts associated with the male pores. Simple
intestinal caeca paired, originating in segment 27, extending to anteriorly for 5–8 segments.
Etymology: The specific epithet “glaucus” in Latin word means “blueish grey or light bluish green”. This name referes to greenish body color of this species.
Remarks. The new species has three spermathecal pores in furrows 6/7/8/9 and [sic] simple intestinal caeca, and is characterized by thick-short figure and greenish body
color. The new species resembles Amynthas sexpectatus (Tsai et al., 1999) of Taiwan, but is distinguished by 1) male pores transverse slit on the top of elliptical protuberance (male pores at
the top of corn-shaped porophore in Amynthas sexpectatus), 2) spermathecal diverticulum consisting of short duct and smoothed sausage-shaped pouch (consisting of short duct and granulated
sausage-shaped pouch in Amynthas sexpectatus), 3) external markings (genital glands absent) which swelled serrated lip-like pads surround each spermathecal pores (oval-shaped disk-liked
genital pads on posterior end of segments 6–8 in Amynthas sexpectatus). The comparison of characters between the new species and Amynthas sexpectatus are summarized in Table 1. (Chang et al.,
2009; Chen, 1931, 1933, 1935, 1936, 1938, 1946; Chen et al., 1975; Gates, 1935, 1972; Ishizuka, 2001, 2015; Ishizuka and Minagoshi, 2014; Nakamura, 1999).
日本産ミミズ大図鑑
