Enchytraeus undefined-3
Enchytraeus sp.3 from Kerguelen Islands Material examined KERGUELEN ISLANDS • 5 specs; Ile Guillou Island; ID 260 to 261, slide No. 3035 to 3037; ELTE. Description Based on the few specimens in imperfect condition, Echytraeus sp.3 from Kerguelen Islands is very similar morphologically to E. albidus...
| Main Authors: | , , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://zenodo.org/record/7987802 https://doi.org/10.5281/zenodo.7987802 |
| Summary: | Enchytraeus sp.3 from Kerguelen Islands Material examined KERGUELEN ISLANDS • 5 specs; Ile Guillou Island; ID 260 to 261, slide No. 3035 to 3037; ELTE. Description Based on the few specimens in imperfect condition, Echytraeus sp.3 from Kerguelen Islands is very similar morphologically to E. albidus s. str. MEASUREMENTS. Body length 10–13 mm, segment number 44–54, 610–660 μm wide at clitellum, fixed. CHAETAE. Chaetal formula: 3–2,3:3,4–2,3. 87–95 μm × 8 μm in ventral bundles, 77–80 μm × 7.5 μm in lateral bundles preclitellarly and 77–80 μm × 7 μm in ventral bundles and 62–70 μm × 5 μm in lateral bundles posteriorly. DORSAL VESSEL. from XIII–XIV. COELOMOCYTES. 31–42 μm long. SPERM SACS. Large sperm sacs, located in X–XI. SPERM FUNNEL. 375–550 μm long, about 4 × as long as wide, fixed. SPERMATOZOA. About 60 μm long, heads 18 μm. Sperm duct about same wide in all length (23–30 μm wide). MALE COPULATORY ORGANS. Male glands multiple: one larger rounded primary bulb (80–100 μm, fixed) and numerous smaller glands. SPERMATHECAE. Ectal duct of spermatheca with glands around duct, not only at the orifice. Ampulla with one diverticulum (about 210 μm long, fixed). Distribution and habitat Guillou Island, Kerguelen Islands, under a small clump of Poa kerguelensis. Results of molecular analysis Results of molecular analysis corroborated that E. adrianensis sp. nov., E. andrasi sp. nov. and E. andrasiformis sp. nov. are new, distinct species, since the sequences obtained from the examined individuals clearly separated in the phylogenetic trees (Figs 10–12). Our study also provided new reference sequences for E. albidus s. str., E. irregularis, E. krumbachi, and it provided sequences for further unnamed taxa within the E. albidus group (E. sp.2 and E. sp.3). Enchytraeus andrasi sp. nov. and E. andrasiformis formed distinct lineages, they were placed outside the clade of the E. albidus complex in the phylogenetic trees. The p-distances between the COI sequences of E. andrasi and E. andrasiformis are 16.8–17.6%, the H3 distances ... |
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