Henlea

Dózsa-Farkas, Klára, Felföldi, Tamás & Hong, Yong, 2015, New enchytraeid species (Enchytraeidae, Oligochaeta) from Korea, Zootaxa 4006 (1), pp. 171-197 : 191-192

Henlea sp.

( Figure 13 , C–I)

The investigated specimens are very similar to H. ventriculosa in the following: size (8–12 mm, 40–44 segments), intestinal diverticula in VIII, with large cavity inside ( Fig. 13 C,D), dorsal vessel origin in IX, 7 pairs of preclitellar nephridia. However, the maximum of chaetae in a bundle is only 6–7 (in H. ventriculosa often 8–10 chaetae are the maximum), the coelomocytes are often slightly rounder than is usual in H. ventriculosa (Dózsa-Farkas, personal observation), and light brown ( Fig. 13 E). The main difference to H. ventriculosa as known from Europe (Dózsa- Farkas, personal observation) are a shorter spermathecal ectal duct and wider spermathecal ampullae ( Fig. 13 H,I).

The sperm funnels collars are also slightly higher and wider. Some specimens slightly resemble H. groenlandica Černosvitov, 1929 (revalidated by Christensen & Dózsa-Farkas 2006) in the shape of the spermatheca and the sperm funnel collar, although it is much wider in the latter species.

Molecular analyses show that this Henlea species from Korea is clearly separated from H. ventriculosa (specimens from Hungary) and from H. groenlandica (specimens from Svalbard), see below.

Figures

FIGURE 13. Micrograph of Achaeta cf. brevivasa (A – B) and Henlea sp. (C – I). Achaeta cf. brevivasa: A. Spermatheca (marked with arrow). B. Clitellar glands, dorsally view. Henlea sp.: C – D. Intestinal diverticula (with larger cavity, marked with arrow, dv = dorsal blood vessel). E. Coelomocytes (ch = chloragogen cells on the intestine). F – G. Sperm funnels (collar marked with arrow in G). H – I. Spermathecae (marked with arrows). All micrographs in vivo. Scale bars 50 µm.