Kynotus voimmanus, Csuzdi & Razafindrakoto & Hong, 2017

Csuzdi, Csaba, Razafindrakoto, Malalatiana & Hong, Yong, 2017, Three new species of Kynotus from the Central Highlands of Madagascar (Clitellata, Megadrili), European Journal of Taxonomy 336, pp. 1-14 : 9-11

Kynotus voimmanus sp. nov.

urn:lsid:zoobank.org:act:8998C949-547B-454E-86E5-50B2EF4DBCB0

Figs 4–5

Diagnosis

Length 145–170 mm, diameter 6–7 mm. Colour greyish with slight reddish hints at the head on dorsum. Segments 1–3 simple, 4–10 biannulate. Setae appear from segment 2 and clearly visible; male pores ventral on 16. Clitellum circular on 18–½28, 28.Three rows of spermathecae of oval shape with long and thin duct in 13/14, 14/15, 15/16. Septa 6/7–8/9 strongly thickened. Genital setal glands in 15.

Etymology

The species epithet refers to the type locality Voimma Community Park.

Material examined

Holotype

MADAGASCAR: clitellate, Ambalavao District , Sendreisoa , Namoly, Mt Ankisira National Park, in primary forest, 18°55′38″ S, 48°24′50″ E, 900 m a.s.l., 2 Mar. 2015. Y. Hong and M. Razafindrakoto leg. ( HNHM / AF5660 ).

Paratypes

MADAGASCAR: 1 clitellate, 9 aclitellate adults ( HNHM /AF5661); 2 clitellate, 5 aclitellate adults ( HNHM /AF5662); 3 aclitellate ( CHBNU MD- 10-AL4); 7 aclitellate ( CHBNU MD- 10-AL8); 9 aclitellate ( CHBNU MD- 10-C). Locality and date same as for holotype

Description

Holotype clitellate, 100 mm in length, diameter after clitellum 7 mm, segment number 115, tail missing. Paratypes 145–170 mm in length, 6–7 mm in diameter, segment number 234–268. Colour greyish, with slight reddish pigmentation at head on dorsum. Head zygolobous, segments 1–3 simple, 4–10 biannulate. Dorsal pores lacking. Setae small, ab and cd clearly observed from segment 2. Setal arrangement after clitellum aa:ab:bc:cd:dd = 23:1.5:13:1:25, dd = 0.32 U ( Fig. 4A ). Clitellum annular on segments 18–½ 28, 28. Male pores ventral on 16. Female pores not seen. Spermathecal pores in 13/14(2–3), 14/15(2–3), 15/16(2) irregularly arranged from bc to above cd. Genital setal pores in variable position between ab and cd on 15.

Internal characters

Large muscular gizzard in 5. Septa 6/7–8/9 strongly thickened, 5/6, 9/10 less so. Calciferous glands, lamellae and typhlosolis lacking. Dorsal blood vessel simple throughout, last pair of hearts in 11. Excretory system holoic, vesiculate. Two pairs of testes and sperm funnels in 10, 11 enclosed in large peri-oesophageal testis sacs. Seminal vesicles lacking. Ovaries in 13. A pair of large, oval copulatory chambers occupying ventral space of segments 16–19. Each copulatory chamber bearing an irregular prostate-like gland (pseudoprostate) reaching segment 22. Spermathecae oval-shaped, with long and thin duct attached at 13/14(2–3), 14/15(2–3), 15/16(2) arranged from above ab to between cd and M ( Fig. 4B ). Single pair of genital setal glands present in segment 15 above ab and around cd. Genital setae slightly curved, with lanceolate apex, length 2.25–2.3 mm, diameter just under the apex 0.07 mm; ornamentation dense short serrations ( Fig. 4 C–D).

Remarks

This new species, with biannulate segments between 4 and 10 belongs to the alaotranus group ( Table 2 ). In the alaotranus group there are only two other species possessing a single pair of genital setal glands: K. rosae Cognetti, 1906 and K. minutus Csuzdi, Razafindrakoto & Blanchart, 2012 . K. voimmanus sp. nov. differs from K. rosae by its smaller number of spermathecal segments (13/14, 14/15, 15/16, 16/17 vs 13/14, 14/15, 15/16) and also in the structure of spermathecae ( K. rosae possesses oval spermathecae with very short ducts, K. voimmanus sp. nov. possesses oval spermathecae with thin and very long ducts, 2–3 times longer that the ampoule). The new species differs from K. minutus in its size and coloration, and furthermore in the position of the clitellum (18–26 vs 18–½ 28), as well as the shape of the spermathecae (short vs long spermathecal duct). K. voimmanus sp. nov. is clearly different from all the examined alaotranus group species by its COI barcode as well ( Table 3 , Fig. 5 ).

Figures

Fig. 4. Kynotus voimmanus sp. nov. A. Setal arrangement, a, b, c, d representing setal lines. B. Spermathecae (13/14) schematic representation. C. Genital seta. D. Tip of the genital seta. Scale bars: C = 0.6 mm; D = 0.1 mm.

Fig. 5. Bayesian inference tree of some species of Kynotus Michaelsen, 1891 using COI sequences. Numbers above branches indicate Bayesian posterior probabilities, below branches ML bootstrap supports. Values lower than 80% are not shown.