Eisenia nordenskioldi mongol
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Ordo: Oligochaeta
Familia: Lumbricidae
Genus: Eisenia
Name
Eisenia nordenskioldi Blakemore, 2013 ssp. n. – Wikispecies link – Pensoft Profile
Material examined
Holotype (H), NIBR IV0000261274 (dissected and figured, Fig. 2, providing DNA - wo63); label details “2012-7-22 Balji Riverside Coll. T-S Park” (possibly near Onon-Balji Conservation Area) at Dadal (ca. 49°1'2.16"N, 110°37'18.49"E), Khentii Province NE of Ulaanbaatar, Mongolia. Paratype P1, IV0000261275 (dissected, providing DNA - wo64) plus six other specimens (P2-7, four mature, two sub-matures, IV0000261276) all labeled “2012-7-21 Dadal”.
Etymology
Nominative singular noun in apposition, after natives of Mongolia.
Description
Body substantial and only slightly trapezoid, posterior barely flattens. Pigment pinkish-grey dorsally in alcohol with ventrum and 9-11 paler laterally; clitellum buff. Lengths 80-110 mm (holotype H 60+50 = 110, paratype P1 80). Segments H 75+67 = 142, P1 131. Prostomium open epilobic (first thought tanylobic in H). Dorsal pores from 3/4 (minute), open from 4/5. Setae closely paired. Tumescences around setae ab on 7 & 11rhs plus 26lhs,27-32 (H); on 7 plus 27-33 (Ps); tumid and pale around lateral setae cd on 8-11 (H, P1). Clitellum saddle-shaped 26-33 (slightly encroaching onto 25 dorsally in some Ps). Tubercula pubertates faint, 29-31 lateral of setal b lines. Nephropores sporadically visible above b or d setal lines, e.g. above d in 9, 13, 14, 23-26, 34, 37, 38, 40, 41; or above b setal lines in some other segments in H. Spermathecal pores paired in 9/10/11 close to mid-D. Female pores in 14 lateral of b. Male pores small in 15 lateral of b just wider than female pores.
Internally, septa 8/9-10/11 slightly thickened. Spermathecae spherical on thin tapering stalks in 9 & 10. Testis and funnels non-iridescent (atrophied?) in 10 & 11. Seminal vesicles paired in 9-12 (smaller in 10). Ovaries compact in 13. Ovisacs vestigial anteriorly in 14. Hearts in 7-11. Nephridial bladders simple, sausage-shaped (in all segments inspected). Calciferous glands large and moniliform in 11 & 12. Crop in 15-16; muscular gizzard in 17-18 with septum 17/18 to midriff. Intestine proper from 19; slight typhlosole noticeably developing to inverted T-shaped from about 27,28. Gut contents mixed coarse organic material and some soil with mica flakes (i.e., a topsoil species). Apart from some loose gregarines, no parasites were observed in the coelom.
Remarks
Lack of spermatozoal iridescence indicates parthenogenesis. Eisenia nordenskioldi mongol sub-sp. n. compares to the nominal subspecies and to Eisenia nordenskioldi polypapillata Perel’, 1969 differing from both due, at least, to its arrangement of setal tumescences. Kobayashi (1940[1] p. 282, 1941[2] p. 148) redescribed Eisenia nordenskioldi from Manchuria [=Northeast China] and northern Korea, while Zicsi (1972[3] p. 131) summarized Eisenia nordenskioldi from Pyongyang, North Korea. These taxa are compared in Table 1. Additionally, the DNA barcodes in Appendix 1 help define new and old taxa.
| Eisenia nordenskioldi mongol ssp. n. | Eisenia nordenskioldi polypapillata | Eisenia nordenskioldi nordenskioldi (*) | |
|---|---|---|---|
| Length (mm) | 80–110 | 55–80 | 25–45 (44–120*) |
| Segments | 131–142 | 102–137 | 106–125 (101–176*) |
| Colour | Pink-grey | Pale | Dark puce to pale |
| Setae aa:ab ratio | Ca. 8–9:1 | ? | (7–8:1*) |
| Spermathecae | 9/10/11 in mid-D | 9/10/11 above d | 9/10/11 mid-D |
| Papillae in ab | 7(11), 25, 26–32 | 16–18, 21–23(24), 26 & 32–34 | 16, 22–34 (or 16, 22–34, 35 or just some*) |
| Paler tumid cd | 8–11 | Not noted | (10–12,13*) |
| Clitellum | ½25,26–33 | 26,27–32 | 26,27–33 |
| TP | 29–31 | ½28,29-½31,31 | 29–31 |
| Neph. bladders | Sausage-shaped | ? | ? |
| Typhlosole | Small T-shaped | ? | ? |
Taxon Treatment
- Blakemore, R; 2013: Earthworms newly from Mongolia (Oligochaeta, Lumbricidae, Eisenia ) ZooKeys, 285: 1-21. doi
Images
|
![Figure 2. A Eisenia nordenskioldi mongol ssp. n. Holotype anterio-ventral view, dorsal prostomium [plus enlargements with that of P1 boxed], posterior, plus actual setal ratios on 13; spermathecae and calciferous glands in situ, nephridia in 12 & 17 B Eisenia nordenskioldi polypapillata after Perel’ (1969[4]: text-fig) for fair use comparison.](/wiki/File:ZooKeys-285-001-g002.jpg)
Other References
- ↑ 1.0 1.1 Kobayashi S (1940) Terrestrial Oligochaeta from Manchoukuo. The Science reports of the Tohoku Imperial University, IV Series 15: 261-256.
- ↑ Kobayashi S (1941) Earthworm of Korea. II. The Science reports of the Tohoku Imperial University (B) 16: 147-156.
- ↑ 3.0 3.1 Zicsi A (1972) Eiseniella koreana, eine neue Regenwurm-Art (Oligochaeta: Lumbricidae) aus Korea. Annales historico-naturales Musei nationalis hungarici 64: 129–132. publication.nhmus.hu/pdf/annHNHM/Annals_HNHM_1972_Vol_64_129.pdf
- ↑ 4.0 4.1 Perel’ T (1969) Die Regenwurmer (Lumbricidae) des Gebirgigen Mittelasian. Pedobiologia 9: 55-68.
