Vazimbascolex Hong, Razafindrakoto et Csuzdi

Hong, Yong, Razafindrakoto, Malalatiana, Blanchart, Eric, Szederjesi, Tímea & Csuzdi, Csaba, 2019, New Acanthodrilid Species From Madagascar (Clitellata, Acanthodrilidae), Acta Zoologica Academiae Scientiarum Hungaricae 65 (3), pp. 215-233 : 215-233

Vazimbascolex Hong, Razafindrakoto et Csuzdi gen. n.

Diagnosis – Setae closely Paired, all ventral. Female Pores on 14. Male aPParatus acanthodriline with microscolecine reduction. Prostate glands oPen in 17, male Pores in seminal grooves in 17/18. Penial setae Present, geni- tal setae lacking. SPermathecal aPParatus Paired, with duPlicate diverticula Muscular gizzard in 5. Holandric, last Pair of hearts in 12. EXtramural calcif- erous glands lacking, large intramural calciferous folds in 12–14. TyPhlosole Present, eXcretory system holoic, avesiculate.

TyPe sPecies – Vazimbascolex alaotranus sP. n.

226 HONG, Y., RAZAFINDRAKOTO, M., BLANCHART, E., SZEDERJESI, T. & CSUZDI, CS.

sPermatheca

NEW ACANTHODRILID SPECIES FROM MADAGASCAR ( CLITELLATA) 227

228 HONG, Y., RAZAFINDRAKOTO, M., BLANCHART, E., SZEDERJESI, T. & CSUZDI, CS.

Etymology – The genus name refers to the first settlers of Madagascar, the V

PeoPle.

Distribution – Madagascar, Eastern rain forests.

Remarks – The new genus differs from the acanthodriline Diplotrema SPencer, 1900 sensu stricto by its microscolecine reduction, lack of setae, Presence of Paired, stalked sPermathecal diverticula and calciferous folds in 12–14. Regarding the sPermathecal structure Vazimbascolex gen resembles the holoic avesiculate Eodriloides Zicsi, 1998 but differs from it its microscolecine reduction and calciferous folds in 12–14. The new shows similarities with Udeina Michaelsen, 1910 which also has a single of Prostates in various Positions (PLISKO 2004), but differs from it by the Plicate sPermathecal diverticula, Presence of a tyPhlosole and holandric aPParatus ( Table 1).

Vazimbascolex alaotranus Hong, Razafindrakoto et Csuzdi sP. n.

( Figs 21–24)

Material eXamined – HolotyPe: HNHM AF/5700 clitellate adult, Ambalataretra District Ambatondrazaka , Alaotra- Mangoro Region, Madagascar. Leg. 25.11.2008, M latiana Razafindrakoto. ParatyPes: HNHM AF/5701, 4 clitellate adult + 4 aclitellate eX., Locality and date same as of holotyPe. HNHM AF/5702, 1 clitellate adult eX., AF/5703, 2 clitellate adult + 1 aclitellate adult eX., Madagascar, Moramanga. Leg .

2017, Yong Hong & Malalatiana Razafindrakoto.

Etymology – The name refers of the geograPhic region (Alaotra- Mangoro) of the t locality.

Diagnosis – Length 170–195 mm, diameter 4 mm. Colour Pale, Pigmenta tion lacking. First dorsal Pore in 7/8. Clitellum saddle- shaPed on 13–18. f Presetal in ab. Prostatic Pores Paired on 17, male Pores in 17/18. SPermathecal Pores in 7/8 lateral to b. SPermathecae mushroom- shaPed with a short bearing two acinuous diverticula. Muscular gizzard in 5, last Pair of hearts 12. Calciferous glands lacking, oesoPhagus with strong longitudinal folds segment 12–14. EXcretory system holoic avesiculate. Holandric, vesicles 12. Penial setae Present, ectal third slightly bent, length ca. 2.2 mm, diameter 0.075 mm, ornamentation dense serrations.

DescriPtion − Length of the holotyPe 172 mm, width (Postclitellar) 4 mm. Segments No. 229. Adult ParatyPes 170–195 mm in length and 4 mm in diameter, segment 265–318. Colour greyish, Pigmentation absent. Prostomium ePilobic, dorsal Pores

7/8. Segments before clitellum clearly multiannulate, quite Prominent after clitellum well. Setae visible from segment 2, eight Per segment in strictly Paired regular rows. S formula after clitellum aa:ab:bc:cd:dd = 7.5:1:8:1:30 ( Fig. 21). Setae of 17 modified to P setae, genital setae lacking. SPermathecal Pores large slits in 7/8 lateral to setae b. C saddle- shaPed on 13–18, if strongly develoPed covers Partly segment 12 as well. F

NEW ACANTHODRILID SPECIES FROM MADAGASCAR ( CLITELLATA) 229

seta, B = ornamentation. 24 = sPermatheca

230 HONG, Y., RAZAFINDRAKOTO, M., BLANCHART, E., SZEDERJESI, T. & CSUZDI, CS.

Pores on 14 Presetal in ab. A single Pair of Prostatic Pores in 17 on Prominent Protuber ances. From the Prostatic Pores highly curved seminal grooves run to the male Pores 17/18. Small genital PaPillae arranged in lines between a-a in 7 and 8 and unPaired PaP just before setae ab on 9, 16, 18, 19 ( Fig. 22).

First sePtum visible 5/6, sePta 6/7–10/11 thickened. One moderate oesoPhageal zard in 5. Dorsal vessel single throughout, last Pair of hearts in 12. EXcretory system loic, avesiculate. Calciferous glands lacking, the oesoPhagus bears Prominent longitudinal folds in segment 12–14. Intestine begins in 16, tyPhlosole small, lamellar. Holandric. Pairs of testes and iridescent male funnels in 10, 11 and vesicles in 9, 12. One Pair of ov in 13. A single Pair of tubular Prostates in 17, large but confined to their own segment Penial setae strong, ca. 2.2 mm in length and 0.075 mm in diameter. The tiP slightly ornamentation dense serrations ( Fig. 23). One Pair of sPermathecae in 8. AmPulla room- shaPed, duct ca. 1/3 as long as the amPoule. A Pair of acinuous diverticula joins the frontal face of the duct just above the sPermathecal Pore ( Fig. 24).