Drawida csuzdii Blakemore, 2014

Blakemore, Robert J., Lee, Seunghan & Seo, Hong-Yul, 2014, Reports of Drawida (Oligochaeta: Moniligastridae) from far East Asia, Journal of Species Research 3 (2), pp. 127-166 : 150-151

21. Drawida csuzdii Blakemore sp. nov.

Material examined. Holotype (H) NMST Tokyo An-449, complete mature, figured and dissected providing DNA tissue sample (JET005-6 that unfortunately failed DNA extraction) in container from Dr Cs. Csuzdi ( Hungary Museum ) with “ 6/22 ” on lid and labelled “ Drawida nemora ? North Korea near Pyongyang; Djonjong-san Mts; Taesong-an. Near to Lake Dungshon. Leg. Cs. Csuzdi 06 July 1988 ” ; Paratype 1 (P1) An-452, mature posterior amputee, figured and dissected providing DNA tissue sample ( JET107 ); P2-3 two mature posterior amputees, (An-451 and An-452) undissected .

Etymology. Named after collector an authority and specialist on earthworm systmatics.

Description. Unpigmented in alcohol with reddish clitellum. Size 120 mm with ca. 180 segments. First two segdc ments almost continuous. Prostomium prolobous with ventral cleft. Dorsal pores absent. Setae small and closely paired (ab=cd). Nephropores small, some near c-lines. Clitellum saddle-shaped 1 / 29 -15. Spermathecal pores 7/8 small pores in mid-cd lines in transverse slits. Male pore superficial in 10/11 approximately in mid-bc in transverse slits that in extruded slightly in P1 but not penial. Female pores paired slits on anterior of 12 near 11/ 12 in b lines. Setae very small and difficult to see. Genital Markings unilateral on rhs in H in 7, 9-12; unilateral in 8-9 in P1, with corresponding glands internally (in 7-12 in H).

Pharyngeal mass to 5 with tendons to 7. Septa 5/6-7/8 thickened; 10/11 and 11/12 fused dorsally to enclose ovaries and egg-sacs in 11. Hearts 6-9 increasingly large; dorsal blood vessel single. Nephridia holoic with convoluted tubule and elongate ‘swiss-horn’ vesicles. Spermathecae with ampulla ventral on septum 7/8, spherical to convoluted duct that exits to body wall without atrium nor accessory gland in 7/8. Iridescent testis in testis sacs spherical, intrasegmentally bulging to both sides of 9/10 with vasa deferentia slightly coiled and entering body wall under glandular prostates. Prostates spherical, each sessile joining with vas deferens at 10/11 exiting via small male porophore that is not considered penial. Ovarian chamber filled with large eggs within 10/11/12 with long ovisacs as far back as 14. Gizzards four in 13-16 (H, P1).

Remarks. Gizzard arrangement of four within 13-16 contrasts to D. nemora Kobayashi, 1936 that usually has four in 12-15, or sometimes five in 12-16 or three in 13-15 (i.e. three to five of in 12,13-15,16). Other differences are: weak first segment; arrangement of the GMs ‾ especially lack of paired mid-ventral markings; the clitellum extending into 15-16; and the prostate glands being more spherical rather than flattened disks. No spermathecal accessory glands were found as per Kobayashi’s original but unlike in his redescription. D. nemora has not been definitely collected from Seoul since Kobayashi’s work, neither have any new earthworm species been described from North Korea since Eisenia koreana (Zicsi, 1972) as redescribed by Blakemore in Blakemore & Park (2012).