Cernosvitoviella crassoductus Dózsa-Farkas, 1990

Dózsa-Farkas, Klára, Csitári, Bianka & Felföldi, Tamás, 2017, A new Cernosvitoviella species (Clitellata: Enchytraeidae) and its comparison with other Cernosvitoviella species from Sphagnum mires in Hungary, Zootaxa 4254 (3), pp. 322-338 : 330

Cernosvitoviella crassoductus Dózsa-Farkas, 1990

( Figures 1 D, 9)

Cernosvitoviella crassoductus Dózsa-Farkas, 1990: 269 –271, figs. 7–10. Timm 1999: 134 –135, 2 textfigs

Material investigated: 3 specimens from site 10 (13.05.2011).

Body 3–4 mm long, 160 µm wide at VIII and 320 µm at XII, segments 19–23. Chaetae sigmoid with nodulus, up to 6–8 per bundle, 44–49 µm long. Brain deeply incised posteriorly, about 120 µm long and 100 µm wide in vivo ( Fig. 9 A). Two pairs primary and two pairs secondary pharyngeal glands. Secondary glands without lobes and larger than the primary glands ( Fig. 9 D). Coelomocytes plum-stone-shaped, 20–26 µm long, transparent, with some refractile granula, but not dark in transmittent light ( Fig. 9 C). Blood light-pink, dorsal vessel origin in XII. The anterior bifurcation in peristomium ( Fig. 9 B). Seminal vesicle absent. Sperm funnels ( Fig. 9 E) small, pearshaped 40–48 µm long and 23–30 µm wide, collars as wide as the diameter of funnel bodies, about 8 µm high. Dilatation of vas deferens proximally just after the funnel, 90–120 µm long and 20–23 µm wide (the diameter of canal 10–13 µm). After the dilatation (i.e. towards male pore) duct about 85–90 µm long and 9 µm wide. Male pore surrounded by a mass of glands about 50–55 µm wide. Spermatozoa 20–23 µm long, heads 10 µm. Spermathecae ( Figs. 1 D, 9F) short, confined to V. Ampullae elongate-oval, 45–55 µm long and 20–22 µm wide, with distinct sperm-containing lumen. Ectal duct 45–80 µm long and 10–14 µm wide, not widened at the orifice.

Figures

FIGURE 1. Spermathecae of Cernosvitoviella species. A. C. farkasi sp. n. B. C. aggtelekiensis. C. C. atrata. D. C. crassoductus. E. C. minor s. l. with small spermatheca. F. C. minor s. l. Scale bars 50 µm.

FIGURE 9. Micrographs of Cernosvitoviella crassoductus. A. Brain, deeply incised posteriorly. B. Anterior bifurcation of dorsal vessel in I, blood light pink. C. Coelomocytes. D. Pharyngeal glands. E. Sperm funnels (white arrows), sperm duct (dilations marked with black arrows, m = male pores). F. Spermathecae. All micrographs in vivo. Scale bars 50 µm.