Dendrobaena retrosella, Szederjesi, Tímea & Csuzdi, Csaba, 2012

Szederjesi, Tímea & Csuzdi, Csaba, 2012, New and little known earthworm species from Greece (Oligochaeta: Lumbricidae, Acanthodrilidae), Zootaxa 3304, pp. 25-42 : 33-34

Dendrobaena retrosella sp. nov.

Holotype. HNHM /15914 adult. No. 15, Trikala County, Lakmos Mts., Chaliki, open torrent and brook, and rocky subalpine grassland N of the village, 1225m, N39°41.908’ E21°11.037’, leg. J. Kontschán, D. Murányi, T. Szederjesi, Zs. Ujvári, 0 9.0 5.2011.

Paratype. HNHM /15915 one adult ex., locality and date same as that of the holotype.

Derivatio nominis. From Latin (retro = backward, sella = saddle), referring to the backward displaced position of the clitellum.

Diagnosis. Length 35–37 mm, diameter 3 mm, setae distant. Pigmentation red-violet. First dorsal pores 5/6. Clitellum on 29–36, tubercles 31–1/n34. Male pore on 15, large. Nephridial pores regularly alternate between b and above d. Three pairs of vesicles in 9, 11, 12; spermathecae 9/10–10/ 11 in d. Calciferous glands with well-developed diverticula in 11, 12. Hearts in segments 7–10, nephridial bladders sausage-shaped.

External characters. Holotype 35 mm long and 3 mm wide; number of segments 107. Paratype 37 mm long and 3 mm wide; number of segments 145. Colour red-violet, especially dark on dorsum. Prostomium epilobous ½ closed. First dorsal pore in intersegmental furrow 5/6. Setae distant. Setal arrangement behind clitellum: aa: ab: bc: cd: dd = 1.3:1:1.2:1.1:2.4. Male pore large on 15, between setae b–c, surrounded by a glandular crescent. Nephridial pores regularly alternate between setal line b and above d. Clitellum on segments 29–36, tubercula pubertatis on segments 31–1/n 34 ( Fig. 2 ). Genital papillae surround setae a, b on segments 9, 28.

Internal characters. All septa membraneous. Testes and funnels free, paired in segments 10–11. Seminal vesicles present in 9, 11 and 12, small in segment 9. Spermathecae two pairs, clearly stalked in 9/10, 10/11 with external openings in setal line d. Calciferous glands with well-developed diverticula in 11, 12. Paired hearts in segments 7–10. Nephridial bladders simple, sausage-shaped. Crop in segments 15–16, and gizzard in segments 17–18. Typhosolis simple, lamelliform. Longitudinal muscle layer of pinnate type.

Remarks. The main characteristic of the new species is the backward shift of the clitellum. The same phenomenon can be observed in three other Greek Dendrobaena species, D. epirotica Zicsi & Michalis, 1993 , D. pindonensis Zicsi & Michalis, 1993 and D. mahnerti Zicsi, 1974 , as well as in the Turkish D. bruna Omodeo & Rota, 1989 and in D. zicsii Karaman, 1973 described from Serbia. The differences between the above-mentioned species are summarized in Table 2 .

Allolobophora veneta Rosa, 1886: 674 .

Dendrobaena veneta: Zicsi & Michalis 1981: 258 . Michalis 1982: 355; 1995: 16. Csuzdi & Zicsi 2003: 127 (for complete synonymy).

Material examined. HNHM /15720 four adult ex., No. 17, Trikala County, Athamon Mts., Athamania, small river and mixed rocky forest S of the village, 935m, N39°30.944’ E21°14.997’, leg. J. Kontschán, D. Murányi, T. Szederjesi, Zs. Ujvári, 0 9.0 5.2011. HNHM /15724 five adult ex., HNHM /15730 one adult ex., No. 14, Ioannina County, Vouliasta, plane tree gallery, spring lake and upper section of Louros River in the village, 235m, N39°25.939’ E20°50.605’, leg. J. Kontschán, D. Murányi, T. Szederjesi, Zs. Ujvári, 0 4.0 5.2011. HNHM /15736 one adult ex., No. 29, Phthiotis County, Agios Georgios, Sperchios River and its gallery forest W of the village, 365m, N38°57.009’ E21°56.712’, leg. J. Kontschán, D. Murányi, T. Szederjesi, Zs. Ujvári, 0 8.0 5.2011. HNHM / 15740 one adult ex., No. 31, Aetolia-Acarnania County, Kamaroula, small river and its littoral scrub N of the village, 130m, N38°38.302’ E21°27.092’, leg. Kontschán, D. Murányi, T. Szederjesi, Zs. Ujvári, 0 7.0 5.2011. HNHM / 15750 one adult ex., No. 16, Trikala County, Neraida Mts., Desi, karst spring and its outlet, and bushy grassland E of the village, 1040m, N39°33.637’ E21°22.315’, leg. J. Kontschán, D. Murányi, T. Szederjesi, Zs. Ujvári, 0 9.0 5.2011. HNHM /15752 two adult ex., No. 15, Trikala County, Lakmos Mts., Chaliki, open torrent and brook, and rocky subalpine grassland N of the village, 1225m, N39°41.908’ E21°11.037’, leg. J. Kontschán, D. Murányi, T. Szederjesi, Zs. Ujvári, 0 9.0 5.2011. HNHM /15857 four adult ex., No. 6, Ioannina County, Kalpaki, Vellas Monasteri, karstic spring, 420m, N39°50’57.0” E20°37’26.1”, leg. L. Dányi, J. Kontschán, D. Murányi, 12.0 5.2006.

Figures

FIGURE 2. Dendrobaena retrosella sp. nov. Ventro-lateral view of the clitellar region. cl = clitellum, mp = male pore, scale bar = 10 mm.

Tables

TABLE 2. Main characteristics of the Balkanic-Anatolian Dendrobaena species with clitellum shifted backward.

Clitellum D. epirotica Zicsi & Michalis, 1993 31–38 D. pindonensis Zicsi & Michalis , 32,33–40 1993	Tubercula pubertatis Seminal vesicles 33–35,36 9,11,12 35–37 9,11,12	Spermathecae 9/10, 10/11 d 9/10, 10/11 d
D. mahnerti Zicsi, 1974 1/3 35,35–42 D. bruna Omodeo & Rota, 1989 27–38 D. zicsii Karaman, 1973 30–1/2 36 D. retrosella sp. nov. 29–36	38–40 9,11,12 32–36 9,11,12 32–34 11,12 31–1/n 34 9,11,12	9/10, 10/11 d 9/10, 10/11 d 9/10, 10/11 d 9/10, 10/11 d
Dendrobaena veneta veneta (Rosa, 1886)