Amynthas bangtaesan bangtaesan Blakemore

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 : 10

11. Amynthas bangtaesan bangtaesan Blakemore sub-sp. nov. ( Fig. 6A ).

Material. IV0000261300 (DNA sample HY4) mature, rather poorly preserved, sketched and dissected from Bangtaesan Mt. (37̊55′25.30′′N 128̊23′48.42′′E), collected by Dr H.-Y. Seo, 11 th July, 2013. Found with two specimens noted under Amynthas cf. chiakensis above .

Etymology. Named after type locality (noun in apposition).

Description. Dorsum distinctly puce but slightly translucent, ventrum paler. Length 63 mm with 83 segments tapering to tail. Reddish-brown dorsum. Epilobous. First dorsal pore 13/14 (i.e., at start of clitellum). Perichaetine with ca. 50-60 setae. Clitellum 14-16. Spermathecae in 6/7/8 laterally with row of six or seven GM papilla below and median to each pore. Female not found (minute). Male pores small, simple and superficial with ca. 16 setae intervening; above and below and moving ventrally from each porophore are rows of papillae, there being one row above with six or seven papillae and two below with eight to ten total. Spermathecal ampullae saccular with clavate diverticulum on thick muscular duct. Prostates racemose on straight muscular duct. GM glands correspond internally to the GM papillae. Seminal vesicles large in 11 and 12. Caeca manicate in 27.

Remarks. The nearest match for HY9 on Genbank is “ Megascolecidae sp. ” (sic) (AB607052.1) 86%. From the current study, HY4 vs. HY9=610/613 (99%) which is particularly close. It is similar yet differs from Amynthas gucheonensis (Song & Paik, 1970) in its markings which are closer to the spermathecae and only above the male pores in the latter. The type-locality for that species was Gucheon Valley on Geojedo Island and also from Mt Sopaik (or Sobaeksan?) on the mainland. The current taxon, more so than Song & Paik’s, is similar to what may reasonably be expected for a sexual form of Amynthas vittatus ( Goto & Hatai, 1898) although they compared their taxon to A. tappensis (Ohfuchi, 1935) .

Figures

Fig. 6. 6A. Amynthas bangtaesan bangtaesan sub-sp. nov. Holotype providing DNA HY4 (female pore not found). 6B. Amynthas bangtaesan confinius sub-sp. nov. Holotype providing DNA HY9 (see Fig. 1).