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| Amynthas septuaginta Bantaowong & Panha, in Bantaowong, Chanabun, Nantarat et Panha, 2025. ไส้เดือนริมโขงบึงกาฬ || DOI: doi.org/10.58837/tnh.25.8.267154 |
Abstract
Two new earthworm species are described from the Mekong River, Thailand, namely Amynthas septuaginta Bantaowong & Panha, sp. nov. and Metaphire fidelis Bantaowong & Panha, sp. nov. The former is a small Mekong earthworm in the A. aeruginosus species group with two pairs of spermathecal pores in 7/8-8/9. It is mainly distinguished from other Amynthas from the Mekong River by its small size (less than 50 mm), and with no genital markings at the male pore region. The latter is distinguished by having four pairs of spermathecal pores in 5/6-8/9, genital markings paired on xvii, ampulla paddle-shaped, and with diverticulum as a slender tube with a loose loop. Morphological description, taxonomic comments, illustrations, and distribution are provided.
Keywords: Amynthas, Metaphire, taxonomy, Mekong River
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| External and internal morphology of holotype (CUMZ3831) of Amynthas septuaginta sp. nov., A. external ventral view; B. internal dorsal view; C. spermathecae. Dark arrow indicates the connection of the spermathecae and spermathecal pore. |
Amynthas septuaginta Bantaowong & Panha, sp. nov.
ไส้เดือนริมโขงบึงกาฬ
Metaphire fidelis Bantaowong & Panha, sp. nov.
ไส้เดือนภักดีแม่น้ำโขง
Ueangfa Bantaowong, Ratmanee Chanabun, Nattawadee Nantarat and Somsak Panha. 2025. Description of Two New Earthworm Species (Oligochaeta: Megascolecidae) from the Mekong River, Thailand. Tropical Natural History. Suppl. 8; 305-312. DOI: doi.org/10.58837/tnh.25.8.267154 [2025-10-20]