Glyphidrilus malayanus Michaelsen 1902

Dimensions: body length 87 mm. Body cylindrical in anterior part, quadrangular in transverse section-behind clitellum. 246 segments. Body colour pale brown. At posterior end dorsal surface considerably broader than the ventral. Clitellar wi on ventro-lateral part of clitellum in ¾18–½22. Prostomium zygolobous. Dorsal pores absent. Clitellum annular in 15–26. Four pairs of setae per segment from 2, setal formula aa:ab:bc:cd:dd = 1.0:0.5:1.5:0.5:1.0 in segment 8. Female pores, male pores and spermathecal pores not visible. Gm laterally paired or asymmetrical on bc in 15–17. Septa 5/6–7/8 thicker, 8/9–11/12 thick and 12/13 to the last segment thin. Gi small, globular within 8. Intestine enlarged from 14. Dorsal blood vessel anterior to 9. He in 9–11. Np distinguishable from segment 17 onwards. Sv in 9–12, those of segment 12 are larger than the others. Ov in 13–14. Testis in 10–11. Prostate and accessory glands absent. Sc in 14/15–16/17, two on each side per segment.