Three new earthworm species of the genus Amynthas (family Megascolecidae) from northern mountainous part of Okinawa-jima Island, Japan
2018
Azama, Y. | Ishizuka, K.
Three new earthworm species of the genus Amynthas (Family Megascolecidae) were described from the forest area, northern part of Okinawa-jima Island. A. surculatus sp. nov. is characterized by single large circular sucker-shaped genital markings at mid-ventral line and post-setal on segments 7-8 (occasionally 6-8); scientific name refers to the large circular sucker-shaped genital marking at pre-clitellar. A. glaucus sp. nov. is characterized by thick-short figure and greenish body color; scientific name refers to greenish body color. A. cucurbitae sp. nov. is characterized by large gourd-shaped colored patch types external markings, close to male pore; scientific name refers to the gourd-shaped external markings. Three new species are distinguishable from the other congeneric species by combinations of the following character status; 1) number of spermathecal pore, 2) number and situation of genital markings, 3) external markings, 4) spermathecae, 5) genital glands, 6) body size and body color.
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