Pheretima baungonensis, James, 2004

James, Samuel W., 2004, New Species Of Amynthas, Pheretima And Pleionogaster (Clitellata: Megascolecidae) Of The Mt. Kitanglad Range, Mindanao Island, Philippines, Raffles Bulletin of Zoology 52 (2), pp. 289-313 : 303

Pheretima baungonensis , new species

( Figs. 3C, D )

Material examined. – Holotype - adult ( NMA 003983 ), Philippines, Mindanao Island, Bukidnon Province, Mt. Kitanglad Range , 15 km S, 6 km. E of Baungon, 8 11' N, 124 44.5' E, 1100 m. elevation, coll. D. Balete, no date.

Etymology. – The species is named for the nearest village, Baungon.

Description. – Dark brown anterior dorsal pigmentation, medium brown posteriorly, pigment absent from segmental equators, 107 x 4.0 mm (vii), 4.5 (x), 4.2 mm (xxv), 97 segments; body cylindrical in cross-section, tail bulbous, narrowing abruptly in last ten segments. First dorsal pore 13/ 14, spermathecal pores 7/8, 0.32 circumference apart, female pore single in xiv, openings of copulatory bursae paired in xviii, 0.19 circumference apart in 7 th setal line, 8 setae between openings. Setae somewhat more crowded ventrally; 38 setae on vii, 50 setae on xx; in vii ZZ: YZ = 1.8, in xx ZZ: YZ = 1.7, no ventral gaps. Clitellum annular xiv-xvi; spermathecal pores surrounded by thick lips ( Fig. 3C ).

Septa 6/7, 7/8, 10/11-13/14 muscular, 8/9 thin, 9/10 absent. Dense tufts of nephridia on anterior faces of 5/6, 6/7; nephridia of intestinal segments located at septum/body wall junction mainly on body wall at anterior and posterior faces of septa.

Large gizzard in viii, esophagus with low vertical lamellae xxiii, intestinal origin xv, simple caeca originating in xxvii, extending forward to xxv, ventral margins slightly incised; typhlosole xxvii-xlvi, simple fold 0.10 lumen diameter; intestinal wall with 32 longitudinal blood vessels xxvii-xxxix.

Hearts x-xiii esophageal, commissural vessels vi, vii, ix lateral, ix left side lacking; viii to gizzard; supra-esophageal vessel x-xiii; extra esophageal vessel joins ventral esophageal wall in x, receives efferent parieto-esophageal vessel in xiii.

Ovaries and funnels free in xiii, spermathecae paired, preseptal in vii with nephridia on ducts; each spermatheca with cordate ampulla, broad stout duct, stalked diverticulum attached to ectal portion of duct, terminating in sausage-shaped receptacle, stalks long, with two coils closely adherent to spermathecal duct ( Fig. 3D ). Male sexual system holandric, testes and funnels enclosed in paired sacs in x, xi; seminal vesicles xi, xii each with digitate dorsal lobe; vasa deferentia slender, free from body wall en route to ental end of prostatic ducts; each prostate a single racemose mass, occupying xvii-xix, stout muscular duct entering surface of copulatory bursa in xviii; coelomic surfaces of paired copulatory bursae muscular, lacking glandular or other projections; blocky angular appendage in position of penis, two pads dependent from roof of copulatory bursae.

Remarks. – The spermathecal and male pores of P. baungonensis are spaced differently, an unusual condition in this genus. The pore spacings are much greater than in P. vicinipora , which is otherwise similar to P. baungonensis , and the former has spermathecae in viii rather than vii as in P. baungonensis . These two species also differ in setal counts, the number of longitudinal blood vessels in the intestinal wall, the intestinal origin, and the shape of the spermathecal diverticulum.

Figures

Fig. 3. Spermathecae, and ventral views showing spermathecal pores, female pores, and male pores of P. vicinipora (A, B), P. baungonensis (C, D), Pheretima paucisetosa (E, F), P. alba (G, H), P. rubida (I, J), and P. virgata (K, L, plus M, spermatophore). Symbols: fp, female pore(s); mp, male pores; sp, spermathecal pores.