Amynthas centurio Blakemore, 2015

Blakemore, Robert J., Lee, Seunghan & Seo, Hong-Yul, 2015, Account of montane and insular speciation in some Korean megadriles (Annelida: Oligochaeta), Journal of Species Research 4 (1), pp. 1-22 : 13-14

16. Amynthas centurio Blakemore sp. nov. ( Fig. 9 ).

Material. IV0000261303 (Holotype DNA sample HY6 - nil results) mature, sketched and dissected from Bangtaesan Mt, (37̊55′25.30′′N 128̊25′48.42′′E), collected by Dr H.-Y. Seo, 11 th July, 2013. Sample also contained seven specimens (IV000261304) of three mature M. hilgendorfi and three blue Drawida sp. matures plus an immature. A second container had many specimens but was overcrowded so preservation was poor, all allocated IV 000261305.

Etymology. Latin centurio (m noun) for “one hundred” loosely referring to the markings.

Description. Length 65 mm with 92 segments. Reddish dorsum and pale ventrum, body somewhat transparent. Open epilobous. First dorsal pore 12/13. Perichaetine with ca. 40 setae. Clitellum 14-16 slightly darker. Spermathecae in 6/7/8 laterally ca. 0.5 circumference apart with ca. 18 GM papilla in a row just below intersegmental furrow between each pore. Female pore central on 14. Male pores in setal line on small circular porophore on 18 with a semi-circle of papillae median to each pore and four rows of numerous GM papillae numbering more than sixty. Spermathecal ampullae saccular and slight on short duct with small clavate diverticulum; glands match GMs. Prostates racemose on S-bent muscular duct with glands internally to the GMs. Seminal vesicles large in 11 & 12. Caeca manicate in 27.

Remarks. The most distinctive characteristic of the current species from cohorts is the arrangement of GMs numbering about one hundred small papillae in 7/8, 8/9 and especially between the male pores on 18. The shape of the spermathecae and manicate caeca are also indicative. DNA sequencing was unforthcoming but morphology alone defines this species.

Figures

Fig. 9. Amynthas centurio sp. nov. Holotype providing DNA HY6.