Polypheretima pagudpudensis, Hong & James, 2011

Hong, Yong & James, Samuel W., 2011, New Species Of Pheretima, Pithemera, And Polypheretima (Clitellata: Megascolecidae) From Kalbaryo, Luzon Island, Philippines, Raffles Bulletin of Zoology 59 (1), pp. 19-28 : 26-27

Polypheretima pagudpudensis , new species

( Figs. 8 A–C)

Material examined. – Holotype: One clitellate ( NMA 4392 ), Philippines, Ilocos Norte Province, Pagudpud, Kalbaryo (18°33.65'N 127° 57.83'E), 239 m, litter layers in the forest, coll. Y. Hong, A. Castillo & M. Levi, 14 Mar.2001, 3 Jun.2001.

Other material: 3 aclitellates, same data as for holotype ( NMA). Diagnosis. – Two pairs of spermathecal pores in 5/6, 6/7; male pores xviii on extending to lateral margin of ventrum, distance between male pores 1.5 mm (0.23 circumference ventrally apart). Genital markings paired in xvii, xix and xx .

Etymology. – The species is named for its type locality, Pagudpud in Philippines.

Description. – Worm unpigmented. Dimensions 56–63 mm by 2.1 mm at segment x, 2.2 mm at xxx, 2.0 mm at clitellum, segments 126–136; body cylindrical in cross-section. Setae regularly distributed around segmental equators, numbering 63 at vii, 27 at xx; 8 between male pores, size, distance irregular; setal formula AA:AB:YZ:ZZ = 3:1.5:1:1 at xiii. Clitellum annular in xiv–xvi; setae invisible externally.

First dorsal pore in 12/13, two pairs of spermathecal pores in 5/6, 6/7. Female pore single in xiv on 0.3 mm oval, male pores xviii on protuberant white spot at center of round porophores, distance between male pores 1.5 mm (0.23 circumference ventrally apart). Genital markings paired in xvii, xix, xx; all slightly medial to male porophores; genital markings within white epidermal thickenings spanning greater width than male porophores; small paired pre- and post-setal epidermal thickenings medial to porophores in xviii.

Septa 5/6–7/8 thick, 8/9–13/14 thin. Gizzard in viii, intestine enlarged from xv, intestinal caeca absent; typhlosole large, 1/2 lumen diameter from xxii. Hearts x–xii esophageal; ix lateral.

Ovaries and funnels in xiii, spermatheca in vi, vii without nephridia on spermathecal ducts; spermatheca with elongate ampulla, diverticulum stalk shorter than ampulla, chamber small oval. Male sexual system holandric, testes and funnels in dorsally united sacs in x, xi. Sacs do not enclose hearts. Seminal vesicles two pairs in xi, xii, very small. Prostates broad but thin, in xvii–xxii, ducts slender.

Remarks. – The species shares the spermathecal pores in 5/6, 6/7, and male pores on prominent porophores with Polypheretima sempolensis Easton, 1979 . Polypheretima sempolensis has paired postsetal genital markings on xvii, and paired presetal on xix, but the present species has paired genital markings covering the ventrum of xvii, xix, and xx. Also, Polypheretima pagudpudensis , new species, has no genital markings in the spermathecal pore region, but Po. sempolensis has paired presetal genital markings on ix, xii and occasionally xiii, median to the line of spermathecal pores, and the genital markings are exceptionally large, invading the setal lines and the intersegmental furrows. Polypheretima sempolensis were recorded from East Java, at 1,400 –1,500 m elevation.

Figures

Fig. 8. Polypheretima pagudpudensis, new species: A, ventral view; B, spermathecae; C. malepore region in xviii. Scale bars = 3 mm (A), 2 mm (C), 1 mm (B).