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77 results for “Helobdella”
Figure 3 in Helobdella stagnalis (Hirudinea: Glossiphoniidae), the first facultative mussel-associated leech in Europe
Figure 3. Dorsal (D) and ventral (V) view of ethanol-preserved Helobdella stagnalis specimens from the mantle cavity of freshwater mussels, Volga River basin, European Russia (leeches were fixed without precursory relaxation). (a) Specimen RMBH Hir_0464_1 carrying cocoons with eggs on its venter. (b) Specimen RMBH Hir_0465. (c) Specimen RMBH Hir_0466. (d) Specimen RMBH Hir_0467. Scale bar = 1.0 mm. Photos: Tatyana A. Eliseeva.
Figure 1 in Helobdella stagnalis (Hirudinea: Glossiphoniidae), the first facultative mussel-associated leech in Europe
Figure 1. Map of collecting localities in the Volga and Don River basins, European Russia. The color filling indicate river basins: Don (1) and Volga (2). The red circles indicate localities in which freshwater mussels (Unionidae) were infested by the glossiphoniid leech species Helobdella stagnalis. The green circles indicate localities in which freshwater mussels were not infested by leeches. The yellow circles indicate the larger cities. The raw data on occurrence of leech and mussel host can be downloaded from figshare (Bolotov et al. 2022: Dataset 1).
Figure 4 in Helobdella stagnalis (Hirudinea: Glossiphoniidae), the first facultative mussel-associated leech in Europe
Figure 4. Median-joining haplotype network of Helobdella stagnalis based on the COI sequence data (N = 108 sequences; see Table 2 and Appendix 1 for detail). The red numbers near branches indicate the numbers of nucleotide substitutions between haplotypes. The circle size corresponds to the number of available sequences per haplotype (smallest circle = 1 sequence). The blue dashed circles reveal the three intraspecific mtDNA lineages.
Figure 2 in Helobdella stagnalis (Hirudinea: Glossiphoniidae), the first facultative mussel-associated leech in Europe
Figure 2. Examples of living Helobdella stagnalis leeches (indicated by red arrows) in the mantle cavity of Anodonta anatina from (a) Syzranka River [sample RMBH Hir_0464] and (b) open pit connected with the Samara River [sample RMBH Hir_0467], Volga River basin, European Russia. Photos: Ilya V. Vikhrev.
Figs. 5–15. Helobdella ringueleti, n in Hirudinea from the Apolobamba in the Bolivian Andes, Including Three New Species of Helobdella (Clitellata: Hirudinea)
Figs. 5–15. Helobdella ringueleti, n. sp. 5. Dorsal surface of the holotype. 6. Ventral surface of the holotype. 7. Cephalic region of the holotype showing constriction at VI a2/a3 (arrowheads) and nuchal gland at VII a1 (arrow). 8. Anterior dorsal surface of a juvenile found attached to an adult. 9. Dorsum of the holotype exhibiting subdivision of midbody annuli (arrowheads). 10. Clitellar region of the holotype with male (m) and female (f) gonopores separated by one annulus. 11. Male median reproductive apparatus with laterally deployed atria (a) and sperm ducts arranged in XIII and XIV. 12. Male median reproductive apparatus dissected away from the adult and viewed from anterior to the male gonopore (m) illustrating the preatrial cornua (arrowheads) of the sperm ducts. 13. Folded ovary (o) and thinner oviducts (arrowheads) in XIII. 14. Anterior digestive system showing the long coiled proboscis (p), salivary ductules (arrowheads), and gastric tube lacking caeca (g). 15. Posterior digestive system with unbranched gastric tube (g) and two postcaeca (white arrowheads); black arrowheads = testisacs.
Map 1 in Hirudinea from the Apolobamba in the Bolivian Andes, Including Three New Species of Helobdella (Clitellata: Hirudinea)
Map 1. Satellite image of the Apolobamba region and collection localities (see figs. 1–4) marked with the joint American Museum Center for Biodiversity and Conservation/Coleccion Boliviana de Fauna 1999 expedition routes (dashed lines).
Figs. 25–30. Several glossiphoniid leeches. 25. Haementeria gracilis. 26 in Leech Collections from Chile Including Two New Species of Helobdella (Annelida: Hirudinida)
Figs. 25–30. Several glossiphoniid leeches. 25. Haementeria gracilis. 26. Theromyzon propinquium (live). 27. Helobdella duplicata. 28. Helobdella simplex. 29. Helobdella michaelseni. 30. Helobdella cordobensis.
Figs. 31–37. Helobdella wodzickiorum, n in Leech Collections from Chile Including Two New Species of Helobdella (Annelida: Hirudinida)
Figs. 31–37. Helobdella wodzickiorum, n.sp. 31. Two specimens demonstrating dorsal appearance and variability. 32. Ventral appearance. 33. Base of proboscis (p) at junction with esophagus (oe) where small salivary glands (arrowheads) surround the salivary ductule bundle (sd) draining parenchymal salivary cells. 34. Female (f) and male (m) gonopores on venter. 35. Gastric postcaeca (arrowheads) viewed ventrally. 36. Dorsal view of male median reproductive apparatus showing the prominent atria (a) and extremely long sperm ducts (d) for which the ascending and descending portions are markedly different in diameter (inset). 37. Elongate ovisacs (o).
Figs. 38–43. Helobdella pichipanan, n in Leech Collections from Chile Including Two New Species of Helobdella (Annelida: Hirudinida)
Figs. 38–43. Helobdella pichipanan, n.sp. 38. Ventral (top) surface of adult with 33 attached juveniles, and dorsal surface (bottom) of another adult. 39. Dorsal view of cephalic somites showing the position of the nuchal gland (arrow) and the subdivision of annuli (arrowheads). 40. Subdivision of annuli (arrowheads) in clitellar and midbody somites. 41. Median reproductive apparatus with diminutive atria (a), sperm ducts (d), and ovisacs (o). 42. Dissection of anterior somites revealing the long proboscis (p) and salivary ductule bundle (sd) draining parenchymal salivary cells (s). 43. Alimentary canal comprising the esophagus (oe), weakly defined gastric caeca (g), and intestinal caeca (arrowheads).
Figs. 7–14. Mesobdella gemmata. 7, 8, 9 in Leech Collections from Chile Including Two New Species of Helobdella (Annelida: Hirudinida)
Figs. 7–14. Mesobdella gemmata. 7, 8, 9. Live specimens from ChanChan Alto feeding on the second author. 10. Dorsal view of cephalic somites. 11. Lateral view of caudal somites in which no respiratory auricle is visible. 12. Dissection of clitellar somites revealing the median reproductive apparatus including the penis sheath (pe), epididymes (e), vaginal sac (v), and an ovary (o). 13. Female median reproductive apparatus exhibiting independent oviducts (arrowheads) and a small vaginal caecum (vc). 14. Male median reproductive apparatus showing the stout penis and sheath (pe) and associated epididymes (e).
Figs. 1–6. Americobdella valdiviana. 1. Whole specimen approximately 20 in Leech Collections from Chile Including Two New Species of Helobdella (Annelida: Hirudinida)
Figs. 1–6. Americobdella valdiviana. 1. Whole specimen approximately 20 cm in length from the Universidad Austral. 2. Ventral view of female (f) and male (m) gonopores. 3. Dorsal view of caudal somites in which there are no annuli between the anus and the sucker. 4. Dorsal view of cephalic somites in live specimen from Hueyelhue. 5. Lateral view of cephalic somites in live specimen from Hueyelhue. 6. Dissection of clitellar somites revealing the atrial region (a), ovisacs (o), female gonopore (f), and the conducting tissue (arrowheads) between the oviducts and male median reproductive apparatus.
Figs. 25–35. Helobdella sorojchi, n in Hirudinea from the Apolobamba in the Bolivian Andes, Including Three New Species of Helobdella (Clitellata: Hirudinea)
Figs. 25–35. Helobdella sorojchi, n. sp. 25. Lateral view of the holotype with a finely striped surface. 26. Dorsal surface of a paratype with a more speckled appearance. 27. Cephalic region of an adult exhibiting eyes at margin of II/III. 28. Anterior view of the oral sucker with terminal mouth pore on leading margin. 29. Lateral view of a specimen with proboscis protruding from terminal mouth pore. 30. Dorsal surface of the holotype showing weak subdivisions (arrowheads) of midbody annuli. 31. Ventral surface of an adult with prominent male (m) and female (f) gonopores and paramedial pigmentation pattern. 32. Median reproductive apparatus with the atria (*) removed, ovaries (o) extending to XVII/XVIII, and in which the descending sperm ducts (arrowhead) loop underneath the ovaries along the ventral muscle layer. 33. Dorsoposterior view of male atria. 34. Proboscis (p) and small compact salivary glands (arrowheads). 35. Posterior digestive system with five gastric caeca (g) including large postcaeca (arrowhead) lateral to four pairs of intestinal caeca (i).
Figs. 36–39. Cylicobdella coccinea. 36. Cephalic somites viewed dorsolaterally. 37. Caudal sucker. Fig. 38 in Hirudinea from the Apolobamba in the Bolivian Andes, Including Three New Species of Helobdella (Clitellata: Hirudinea)
Figs. 36–39. Cylicobdella coccinea. 36. Cephalic somites viewed dorsolaterally. 37. Caudal sucker. Fig. 38. Ventral surface with female (f) and male (m) gonopores and protruding penis (arrowhead). 39. Male median reproductive apparatus including paired atria (a) and cornua.
Figs. 16–24. Helobdella nununununojensis, n in Hirudinea from the Apolobamba in the Bolivian Andes, Including Three New Species of Helobdella (Clitellata: Hirudinea)
Figs. 16–24. Helobdella nununununojensis, n. sp. 16. Dorsal surface of the holotype. 17. Ventral surface of the holotype with attached brood of hatchlings. 18. Venter showing the broadened brood pouch from XVI through XX. 19. Venter showing the male (m) and female (f) gonopores as well as the central eggbowling trough (arrowhead) exhibited by adults in the early stages of brooding. 20. Anterior of an adult demonstrating the aglandular nuchal pad. 21. Median reproductive apparatus with the tip of an oviduct (o) at XVII and the longer sperm ducts reaching XVIII/XIX. 22. Anterior digestive system with the proboscis (p) having two glandular salivary masses (arrowheads) at its base in XIII. 23. Posterior digestive system with the short postcaeca (arrowheads) in XIX only and the four pairs of intestinal caeca (i). 24. Typical brooding attitude of this species.
Figs. 1–4 in Hirudinea from the Apolobamba in the Bolivian Andes, Including Three New Species of Helobdella (Clitellata: Hirudinea)
Figs. 1–4. Collection localities in the Apolobamba range. 1. Valle Tojoloque (looking west) with locality UU99–6 (lower arrow) and UU99–11 (upper arrow) at 3750 m and 3860 m, respectively. 2. Qanchis Qocha or Siete Lagunas (looking southeast) and collection sites (arrows) for UU99–20 at 4050 to 4100 m. 3. Pusu Punku (looking west) and site UU99–40, Ñuñuñuñuñoj (arrow) at 3870 m. 4. View northeast down the steep walled Rio Pelechuco Valley toward Piara at 2820 m (arrow).
Figures 1–4 in Testisacs microanatomy and spermatogenesis of Helobdella simplex (Hirudinida: Glossiphoniidae)
Figures 1–4. Helobdella simplex, cross section of the testisac in stages I, II and III of spermatogenesis: (1) poliplasts in the testisac lumen; (2) Stage II; (3, 4) Stage III of spermatogenesis. (C) Cytophore, (eg) spermatogonia, (em) testicular funnel, (ep) primary spermatocytes, (es) secondary spermatocytes, (et) spermatids, (ez) spermatozoa, (fa) phagocytes, (lu) testisac lumen, (m) mesothelial cell. Scale bars: 1, 3, 4 = 50 µm, 2 = 10 µm.
FIGURES 8–9 in Helobdella nahuelhuapensis sp. nov. (Hirudinea, Glossiphoniidae), from Bariloche, Argentina
FIGURES 8–9. Internal morphology of H. nahuelhuapensis sp. nov. 8. Digestive system and testisacs: proboscis (pr), oesophagus (oe), salivary glands (s), gastric chambers (ch), postcaeca (p), intestinal caeca (ic), and testisacs (t). 9. Male medial reproductive apparatus with atrium (a), sperm ducts (sd), and male pore (m). Female reproductive apparatus showing folded ovisacs (o).
FIGURES 1–7 in Helobdella nahuelhuapensis sp. nov. (Hirudinea, Glossiphoniidae), from Bariloche, Argentina
FIGURES 1–7. External morphology of H. nahuelhuapensis sp. nov. 1. Dorsal surface of holotype with randomily arranged chromatophores. 2. Ventral surface of the holotype showing one pair of inframarginal lines. 3. Dorsum of holotype showing subdivision of middorsal annuli a1 a2 a3 at somite XVII and XVIII. 4. Ventral region of the holotype showing anterior sucker with mouth pore terminal. 5. Unpigmented region at somite VIII. 6. Cephalic region of holotype exhibiting two punctiform eyes. 7. Clitellar region of the paratype with male (m) and female (f) gonopores separated by one annulus.
FIGURE 4. Helobdella atli n in A new freshwater leech species of Helobdella (Annelida: Glossiphoniidae) from central Mexico
FIGURE 4. Helobdella atli n. sp. from Totolcingo, Tlaxcala, Mexico. Scanning electron microphotography of the anterior part, showing nuchal scute.
FIGURE 3. Helobdella atli n in A new freshwater leech species of Helobdella (Annelida: Glossiphoniidae) from central Mexico
FIGURE 3. Helobdella atli n. sp. from Totolcingo, Tlaxcala, México. Scanning electron microphotography of posterior part, showing the position of anus.
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