Pheretima heaneyi, 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 : 293-294

Pheretima heaneyi , new species

( Figs. 1E, F )

Material examined. – Holotype - adult ( NMA 003975 ) Philippines, Mindanao Island, Bukidnon Province, Mt. Kitanglad Range , 8 10.5' N, 124 51' E, 16.5 km S, 4 km E of Camp Phillips, 1900 m. elevation, coll. L. Heaney, 22 Mar.1993.

Etymology. – Lawrence Heaney of the Field Museum of Natural History, initiated the expeditions responsible for the discovery of this and many other earthworms from the Philippines, has assisted the author to conduct biodiversity research in the Philippines, and is a great advocate of conservation in the Philippines. Therefore this species is named in his honor.

Paratype – one adult ( FMNH 011062 ) Philippines, Mindanao Island, Bukidnon Province, Mt. Kitanglad Range , 8 10.5' N, 124 51' E, 16.5 km S, 4 km E of Camp Phillips, 1900 m. elevation, coll. L. Heaney, 22 Mar.1993 .

Other material- five adults ( KUNHM 002143 ), Philippines, Mindanao Island, Bukidnon Province, Mt. Kitanglad Range , 8 10.5' N, 124 51' E, 16.5 km S, 4 km E of Camp Phillips, 1900 m. elevation, coll. D. Balete, no date; two adults ( FMNH 011063 ) Philippines, Mindanao Island , Bukidnon Province, Mt. Kitanglad Range , 8 9' N, 124 44' E, 1800 m. elevation, coll. D. Balete, no date .

Description. – Brown dorsal pigment, pigment absent from segmental equators, body 116-83 x 5.4- 3.9 mm (vii), 5.2- 4.2 mm (x), 5.2-4.0 mm (xxv), 113-97 segments; body cylindrical in cross-section. First dorsal pore 11/12 (6), 12/13 (3) spermathecal pores paired in 5/6, 0.19-0.22 circumference apart, female pore single in xiv, openings of copulatory bursae paired in xviii, 0.19-0.23 circumference apart in 7 th- 9 th setal line, 6-8 setae between openings. Setae regularly distributed around segmental equators, 32-44 setae on vii, 38-48 setae on xx; in vii ZZ:YZ = 1.6-2.1, in xx ZZ:YZ =2.0-3.0; no ventral gaps. Clitellum annular xiv-xvi; no genital markings ( Fig. 1E ).

Septa 4/5-6/7 thin, 7/8 muscular, 8/9 very thin, 9/10 usually lacking, 10/11-13/14 muscular but not thick. Large gizzard in viii, esophagus deeply-pouched, vascularized, with vertical lamellae xi-xv, intestinal origin xviii, simple caeca with slightly incised ventral margins originating in xxvii, extending forward to xxiii or xxiv, sometimes to xxi; typhlosole xxviixliii, lxi, lxii, lxiii, lxvi, lxxiii; simple fold one-third lumen diameter; 28 longitudinal blood vessels in intestinal wall xxvii-xl, xli.

Hearts x lateral, xi-xiii esophageal, commissural vessels vi, vii lateral; viii to gizzard, ix lacking; ventral vessel with branches to body wall in viii, ix. Supra-esophageal vessel xi-xiv, xv; extra esophageal vessels join ventral wall of esophagus in x; efferent parieto-esophageal vessels not seen in clitellar region.

Nephridia in dense tufts on anterior faces of 5/6, 6/7; nephridia of post-clitellar segments in pre-, post-septal rows near septum-body wall junction.

Ovaries and funnels free in xiii, spermathecae paired in vi with nephridia on lateral faces of spermathecal ducts; each spermatheca with large rounded ampulla filling vi, single stalked diverticulum terminating in ovate to sausage-shaped receptacle, stalk with one or more tight loops, at least first loop closely adherent to broad spermathecal duct ( Fig. 1F ). Male sexual system holandric, testes and funnels enclosed in paired sacs in x, xi; seminal vesicles xi, xii large, with digitiform dorsal lobe; vasa deferentia free from body wall en route to ental end of prostatic ducts; each prostate racemose with two major lobes, stout muscular duct entering just anterior to apex of copulatory bursa in xviii; coelomic surface of copulatory bursae soft, white, glandular in appearance, accompanied by one or two larger glandular masses; these glands with lumen opening into copulatory bursa; penis present, its base surrounded by short sheath.

Remarks. – This species also keys to the P. urceolata group, but unlike other members has an intestinal origin in xviii, glandular masses on the copulatory bursae, and lateral hearts in x. It has penes unlike P. kitangladensis . The glandular masses on the copulatory bursae are neither secretory diverticula nor stalked glands, as referred to in Sims & Easton (1972) with reference to subgenus Pheretima (Parapheretima) , but another glandular apparatus entirely. Several other species have anterior and posterior bulges in the copulatory bursae, whose surface is entirely muscular in appearance, but the interior of each bulge proves to have a small lumen connected to the main lumen of the pouch. In this case the surface of the copulatory bursae has nonmuscular glandular tissue.

Figures

Fig. 1. Spermathecae, and external views (ventral except as noted) showing spermathecal pores, female pores, male pores and if present, genital markings, of Pheretima kitangladensis (A, B), P. baletei (C, D), P. heaneyi (E, F), P. bukidnonensis (G. Lateral view of spermathecal pore, ventral view of female and male pores, H), and P. monotheca (I, J). Symbols: fp, female pore(s); mp, male pores; sp, spermathecal pores.