Pleionogaster sivickisi Stephenson, 1933

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 : 308

Pleionogaster sivickisi Stephenson, 1933

Pleionogaster sivickisi Stephenson, 1933: 923 .

Pleionogaster horsti (part) Easton, 1979: 115.

Material examined. – Syntype - one preclitellate ( BMNH 1930 :12:26:5-7), Manila, Philippines, P.B. Sivickis coll., no date .

Description. – Genital markings paired in line with male pores post-setal xvii, presetal xix-xxi, midventral presetal xviii-xx; male pores in 10 th setal line, 2.3 mm apart; female pores paired, separate; spermathecal pores 7/8/9, 2.2 mm apart. Setae estimated 132 in vii, 94 in x, xxv.

Intestinal origin xix, gizzards xxviii-xxx, intestinal constriction xlii-xliii; typhlosolar origin xliii; gizzard of viii very reduced, only a thin layer of shiny white connective tissue around the esophagus. Spermathecal ducts differentiated from ampulla, ampulla rounded, diverticulum digitiform. Male reproductive system holandric, seminal vesicles slender arcs in xi, xii; not enclosed in testes sacs.

Remarks. – With reference to the following specimen from another part of Luzon well to the north of Manila in the Central Cordillera mountains, one can see that the definition of Pl. horsti must be so expansive as to be nearly meaningless. Further comments follow data on the next specimen.