Glyphidrilus buttikoferi Michaelsen, 1922

Chanabun, Ratmanee, Sutcharit, Chirasak, Tongkerd, Piyoros & Panha, Somsak, 2013, The semi-aquatic freshwater earthworms of the genus Glyphidrilus Horst, 1889 from Thailand (Oligochaeta, Almidae) with re-descriptions of several species, ZooKeys 265, pp. 1-76 : 17

9. Glyphidrilus buttikoferi Michaelsen, 1922 Fig. 11 Table 1

Glyphidrilus buttikoferi Michaelsen, 1922: 9. Type locality: Borneo, Sintang. Jamieson 1968: 393. Brinkhurst and Jamieson 1971: 757, Fig. 15.3D - F.

Material examined.

The specimens which closely match the measurements and anatomical characters with the original description is designated herein as the lectotype ZMH V9301 ( Fig. 11 ). The type locality of this species is Borneo, Sintang. Paralectotype: ZMH V9301.1 (3 adults) same locality with lectotype.

Description of Lectotype.

Dimensions: body length 110 mm. Body cylindrical in anterior part, quadrangular in transverse section behind clitellum. 370 segments. Body colour pale brown. At posterior end dorsal surface considerably broader than the ventral. Clitellar wi on ventro-lateral part of clitellum in 25-30. Prostomium zygolobous. Dorsal pores absent. Clitellum annular in 12-33. 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 with rim: lateral paired or asymmetrical on bc in 17-24, median unpaired on aa in 12-24 and 29-31.

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 15. Dorsal blood vessel anterior to 7. He in 7-11. Np distinguishable from segment 15 onwards. Sv in 9-12, with pair in segment 12 larger than the others. Ov in 13-14. Testis in 10-11. Prostate and accessory glands absent. Sc in 14/15-17/18, two to seven on each side per segment.

Variation.

Body length of paralectotypes (3) range from110-150 mm.370 segments. Clitellum in 12, 30-33. Wi in ½25, 25-30.

Remarks.

See Table 1 .

This specieswas recorded only from Sintang, Borneo as in the original description. There are no recent records of this species.

Figures

Figure 11. Morphology of the lectotype (ZMH V 9301) of Glyphidrilus buttikoferi Michaelsen, 1922, showing the A external ventral and B internal dorsal views.