Eutyphoeus assamensis Stephenson 1926

Eutyphoeus assamensis Stephenson, 1926 Figs 12, 14; Table 2 Material examined INDIA – Manipur • 2 clitellates; Churachandpur, residential area; 24.3372° N, 93.7117° E; 6 Oct. 2017; Shweta Yadav leg.; MNP17-1036-41A11, MNP17-1038-41A13. Description Length 80 mm, diameter 4.8 mm. Total number of segments 153. First dorsal pore (?). Prostomium tanylobic. Setae visible from ii. Spermathecal pore on the intersegmental region of 7/8 at b, slit extends from a–c. Clitellum annular, covering ½ of xiii to xvi without thickening of the body wall. Female pore paired at a in a single elliptical patch, presetal on segment xiv. Male genital region oblong shape, avestibulate and apenile, male genital orifices on xvii at b, at the centre of papillae composed of posteriorly united two cotyledons, each papilla in a conspicuous protuberant u-shaped ridge, the limbs of the ‘u’ directed in the middle, terminating abruptly at line a. A midventral region (aa) appears to be flat continuous (contrary to the observation of Gates 1938). Genital markings on xvi elliptical transversely placed, postsetal, paired at b, while margins extend laterally towards a and the crest of the marking exist on b. Septa thickened 6/7/8. Gizzard in viii. One pair of intramural calciferous glands in xii. Intestine begins in xv. Lateral intestinal caeca? Ventral intestinal caeca? Typhlosole? Supra-intestinal gland? Last pair of hearts in xiv. Metandric, testis sac annular in xi, seminal vesicles in xii extends up to xvii. Prostates in xvii extends up to xxi, duct long tubular with single elongated loop. Spermathecae bidiverticulate, tubular, lateral with 4–5 seminal chambers, attached to the junction of duct and ampulla, one on outer side of organ, another hidden slightly towards inner side, ampulla large bladder-like, ductless. Penial setae 6–7 per battery, 2.3–3.5 mm long, highly ornamented with broken circle of irregular-sized jagged teeth, freely hanging in cavity, distal ⅔ of length forming little bow-like curve with slightly curved pointed tip. Remarks The specimen was identified based on the literature of Stephenson (1926), Gates (1938) and Julka (1988), with a large number of variations. The study enumerated features of a single clitellate specimen and a single aclitellate specimen. Specimens were delicate, therefore the lateral intestinal caeca, typhlosole, supra-intestinal gland, ventral caeca were not included in the study. Some observations differed from the original description. For example, the setae were visible from the second segment, there were 6–7 penial setae per battery, diverticula were lateral, penial setae had a slightly curved pointed tip, they were relatively shorter in length, the last pair of hearts were in xiv, and the penial setae were not projected out from male genital orifices.