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FIGURE 16 in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 16. Testudinella patina, scanning electron microscope photographs of complete set of trophi. A. Frontal view. B. Caudal view. Scale bar: 10

FIGURE 15. Testudinella patina. A. Lorica, ventral view. B. Lorica, caudal view. C in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 15. Testudinella patina. A. Lorica, ventral view. B. Lorica, caudal view. C. Distal foot pseudosegment. Scale bars: A, B: 50 µm, C: 25 µm.

FIGURE 14. Testudinella dentata, lorica. A. Ventral view. B. Cross-sectional view. C in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 14. Testudinella dentata, lorica. A. Ventral view. B. Cross-sectional view. C. Ventral view. Scale bar: 50 µm. A, B after Myers (1934); C after Chengalath & Koste (1988).

FIGURE 13. T. crassa, lorica. A. Ventral view. B in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 13. T. crassa, lorica. A. Ventral view. B. Ventral view,? sub T. clypeata. C. Cross-sectional view,? sub T. clypeata. Scale bar: 50 µm. A after Levander (1894); B, C after Gosse (1898).

FIGURE 12 in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 12. Testudinella elliptica, scanning electron microscope photographs of complete set of trophi. A. Frontal view. B. Caudal view. Scale

FIGURE 6. Testudinella obscura. A–E. Loricae, ventral view. F. lorica, dorsal view. G. Lorica, caudal view. H in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 6. Testudinella obscura. A–E. Loricae, ventral view. F. lorica, dorsal view. G. Lorica, caudal view. H. Foot pseudosegments. Scale bars: A–G: 50 µm, H: 25 µm.

FIGURE 11. Testudinella elliptica. A–C. Loricae, ventral view. D in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 11. Testudinella elliptica. A–C. Loricae, ventral view. D. Lorica, cross-sectional view. E. Foot

FIGURE 10 in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 10. Testudinella clypeata, scanning electron microscope photographs of complete set of trophi. A. Frontal view. B. Caudal view. Scale bar: 10 µm. fo: fulcrum opening, sc: sub-ventral chamber.

FIGURE 9 in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 9. Testudinella clypeata, variation in shape of specimen. A, B. Contracted. C. Swimming. Scale bar: 50 µm.

FIGURE 7 in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 7. Testudinella obscura, scanning electron microscope photographs of trophi. A. Complete set, frontal view. B. Detail left manubrium. C. Complete set, caudal view. D. Complete set, lateral view. Scale bars: 10 µm. a: alula, dc: dorsal chamber, fo: fulcrum opening, mc: median chamber, sc: sub-ventral chamber, vc: ventral chamber.

FIGURE 8. Testudinella clypeata. A–C. Loricae, ventral view. D–F in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 8. Testudinella clypeata. A–C. Loricae, ventral view. D–F. Loricae, cross-sectional view. G. Foot pseudosegments. Scale bars: A–F: 50 µm, G: 25 µm.

FIGURE 3 in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 3. Testudinella bicorniculata sp. nov., scanning electron microscope photographs of trophi. A. Complete set, frontal view. B. Complete set, caudal view. C. Complete set, lateral view. D. Detail proximal fulcrum opening and basal apophyses. E. Detail left ramus with arched scleropili. Scale bars 10 µm. a: alula, as: arched scleropili, ba: basal apophyses, dc: dorsal chamber, fo: fulcrum opening, mc: median chamber, sc: sub-ventral chamber, vc: ventral chamber

FIGURE 5 in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 5. Testudinella elongata sp. nov., scanning electron microscope photographs of complete set of trophi. A. Frontal view. B. Caudal view. Scale bar 10 µm. a: alula, fo: fulcrum opening.

FIGURE 4 in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 4. Testudinella elongata sp. nov. A. Lorica, dorsal view. B. Lorica, ventral view. C. Lorica, cross-sectional view. D. Foot pseudosegments. Scale bars A–C: 50 µm, D: 25 µm.

FIGURE 2. Testudinella bicorniculata s p. nov. A. Lorica, ventral view. B. Lorica, caudal view. C in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 2. Testudinella bicorniculata s p. nov. A. Lorica, ventral view. B. Lorica, caudal view. C. Foot pseudosegments. Scale bars: A, B: 50 µm, C: 25 µm.

FIGURE 1 in A review of the marine and brackish-water species of Testudinella (Rotifera: Monogononta, Testudinellidae), with the description of two new species

FIGURE 1. Map indicating sampling areas and distribution of Testudinella bicorniculata sp. nov., T. elongata sp. nov. and T. obscura Althaus. S, Spain; F, France; E, Egypt; I, Italy; P, Philippines.

FIGURES 1–10 in A new species of Polyarthra Ehrenberg, 1834 belonging to the vulgaris- group (Rotifera: Monogononta: Synchaetidae) from Argentina, with a key to the identification of species in the Neotropical Region

FIGURES 1–10. Polyarthra platensis sp. nov. (except in those cases specifically indicated all specimens are from the Paraná River floodplain): 1, Female, with head well protruded, ventral view (near Cuay Grande River, Corrientes). 2, female, dorsal view (dorsal right bundle of paddles omitted), 3, ibid, lateral view, dorsal right bundle of paddles omitted. 4, ibid, posterior view. 5–7, expansion of dorsal integument, right side. 8, lanceolate paddle. 9, ensiform paddle. 10, accessory ventral paddle. Scale bars = 50 μm, a: figs 8–10, b: figs 1–7.

FIGURES 11–16 in A new species of Polyarthra Ehrenberg, 1834 belonging to the vulgaris- group (Rotifera: Monogononta: Synchaetidae) from Argentina, with a key to the identification of species in the Neotropical Region

FIGURES 11–16. Polyarthra platensis sp. nov.: 11, trophi, ventral view. 12, ibid, lateral view. 13, rami, distal part (straightened by crushing with a coverslip) 14, idem (swamp at Garrucho, Corrientes) 15, mallei. 16, mallei and details of distal part of rami. Scale bar = 20 μm.

FIGURE 7. Ptygura thalenoiensis n in Diversity of sessile rotifers (Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand

FIGURE 7. Ptygura thalenoiensis n. sp. 7a, 7b: tube structure in different specimens, 7c: Trophi SEM photograph, frontal view. Scale bars: 7a, 7b = 100 µm, 7c = 5 µm.

FIGURE 6. Ptygura thalenoiensis n in Diversity of sessile rotifers (Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand

FIGURE 6. Ptygura thalenoiensis n. sp. 6a: adult female; 6b: apical region, showing the mouth and ciliated cylindrical process; 6c: contracted specimen, apical region, showing the dorsal hooks. Scale bars: 6a = 100 µm; 6b, 6c = 50 µm.