Amynthas Kinberg, 1867

Bantaowong, Ueangfa, Somniyam, Pattana, Sutcharit, Chirasak, James, Samuel W & Panha, Somsak, 2014, Four new species of the earthworm genus Amynthas Kinberg, 1867, with redescription of the type species (Clitellata: Megascolecidae), Raffles Bulletin of Zoology 62, pp. 655-670 : 656

Genus Amynthas Kinberg, 1867

Type species. Amynthas aeruginosus Kinberg, 1867 , by monotypy.

Diagnosis. Perichaetine megascolecids with large number of setae distributed around segmental equators. Clitellum annular in XIV–XVI. Female pore single, medio–ventral in segment XIV. Spermathecal pores small or large, usually paired, intra- or inter-segmental within the range 4/5–8/9. Male pores paired in segment XVIII, superficial on porophore, copulatory pouches absent. Genital markings present or absent. Dorsal pores present. Ovaries paired in XIII. Spermathecae usually paired. Nephridia usually absent from the spermathecal ducts. One gizzard, behind septum 7/8. Intestine begins in or behind XV. Intestinal caeca present usually originating in XXVII. Single pair of racemose prostate glands with duct joining vas deferens within body cavity. Mostly holandric, rarely proandric or metandric. Seminal vesicles small to large in one or two of segments XI–XII, and sometimes XIII. Last pseudohearts in XIII. Genital marking glands stalked or sessile, present or absent, usually associated with genital markings.