Drawida anchingiana halla, Blakemore, 2013

Blakemore, Robert J., 2013, Jeju-do earthworms (Oligochaeta: Megadrilacea) - Quelpart Island revisited, Journal of Species Research 2 (1), pp. 15-54 : 17-18

Drawida anchingiana halla sp. nov.

[ Fig. 1 ]

Material examined. IV0000251105 Holotype, figured and dissected with tissue samples taken for DNA analysis [WO46 (cf. WO45), w24, w43]. Collected 12 th June 2012 by RJB from Hyonyungsa Temple , Mt Halla (33̊ 21′42′′N 126̊31′45′′E); preservation in 80% EtOH. Note. Superficially similar specimens from Mt Halla looked possibly conspecific but also resemble D. koreana Kobayashi, 1938 are noted as “ Drawida sp.2 ” below.

Etymology. From location, noun in apposition.

Description. Length 60 mm. Segments 128. Body stout, flattened posteriorly. Colour dark brownish in anterior and bluish in posterior. Prolobous, ventrally cleft. No dorsal pores. Clitellum not developed. Nephropores in cd lines. Spermathecal pores in 7/8 median of c lines. Male pores on penes protruding slightly from wide slits centr- ed median of c lines in 10/11. Female pores in b lines in 11/12. Genital markings are widely paired presetally median of c lines in 8 and 10 (circular ‘GM glands’ correspond internally, DNA sample from 8lhs that appeared to contain mucus and a nematode - w43).

Internally, septa 5/6-8/9 thick; others thin and displac- ed; 10/11 supports large testis sac with coiled vas deferens to prostate near exit. Dorsal blood vessel single and hearts in 6-9. Spermathecae atria present anteriorly from 7/8 with long coiled duct to ampulla attached to 7/8 posteriorly in 8. Ovisacs small (empty) from septum 12/13; 11/12 doubled to form an ovarian chamber. Nephridial bladders elongate. Gizzards in 12-14.

Remarks. Drawida gisti Michaelsen, 1931 that occurs on the mainland ( Kobayashi, 1938: 35) has male pores near- er to b lines and gizzards in 12-14, whereas D. anchingiana has male pores nearer to c lines and gizzards described by Kobayashi (1937: 335) as three in “ XII-XVI or XI-XVI ” with markings variable in some of 8, 10 and 11 and either presetal or postsetal; plus a distinctive accessory atrial gland in segment 7. Drawida a. halla sub-sp. nov. has male pores near c lines, gizzards in 12-14 plus widely paired and presetal genital markings in 8 and 10 that, in combination with DNA data in Appendix identify this species.

Figures

Fig. 1. Drawida anchingiana halla sp. nov. holotype showing ventral aspect, prostomium; gizzards and reproductive organs with [boxed] enlargment of male pore.