The semi-aquatic freshwater earthworms of the genus Glyphidrilus Horst, 1889 from Thailand (Oligochaeta, Almidae) with re-descriptions of several species Author Chanabun, Ratmanee Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand Author Sutcharit, Chirasak Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand Author Tongkerd, Piyoros Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand Author Panha, Somsak Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand somsak.pan@chula.ac.th text ZooKeys 2013 2013-02-06 265 1 76 http://dx.doi.org/10.3897/zookeys.265.3911 journal article http://dx.doi.org/10.3897/zookeys.265.3911 1313-2970-265-1 DCFC44484A604991B3F7DAEA77D03FE2 E458246D0C01DA57FF9AF025FF9C8A29 578136 12 . Glyphidrilus elegans Rao, 1922 Fig. 14 Table 1 Glyphidrilus elegans Rao, 1922: 62. Type locality: Sandy islets in the Cauvery, Dubari forests. Fraserpett (Coorg); banks of Sheravaty, Shimoga (Mysore). Glyphidrilus annandalei - Stephenson, 1923: 491. Brinkhurst and Jamieson 1971 : 755. Material examined. The specimen which closely matches the measurements and anatomical characters with the original description is designated herein as the lectotype NHM 1922: 4: 20: 10 ( Fig. 14 ). The type locality of this species is Sandy islets in the Cauvery, Dubari forests. Fraserpett (Coorg); bank of Sheravaty, Shimoga (Mysore). Description of Lectotype. Dimensions: body length 139 mm. Body cylindrical in anterior part, quadrangular in transverse section-behind clitellum. 248 segments. Body colour pale brown. Anus dorsal-terminal. At posterior end dorsal surface considerably broader than the ventral. Clitellar wi on ventro-lateral part of clitellum in 25-31. Prostomium zygolobous. Dorsal pores absent. Clitellum annular in 13-35. 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 at segment 8. Female pores, male pores and spermathecal pores not visible. Gm : lateral paired or asymmetrical on bc in 13-24, and 32-35. Septa 5/6-8/9 thicker, 9/10-11/12 thick and 12/13 to the last segment thin. Gi small, globular within 8. Intestine enlarged from 13. Dorsal blood vessel anterior to 7. He in 7-11. No distinguishable np in first thirteen segments. Sv in 9-12. Ov in 13. Testis in 10-11. Prostate and accessory glands absent. Sc in 13/14-17/18, two to six on each side per segment. Remarks. See Table 1 . This speciesis known only from the type locality in sandy islets in the Cauvery, Dubari forests and Fraserpett (Coorg); banks of Sheravaty, Shimoga (Mysore). Figure 14. Morphology of the lectotype (NHM 1922: 4: 20: 10) of Glyphidrilus elegans Rao, 1922, showing the A external ventral and B internal dorsal views.