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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.

FIGURE 5 in Diversity of sessile rotifers (Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand

FIGURE 5. Trophi SEM photographs of Lacinularoides coloniensis (Colledge, 1918) n. comb. 5a: detail, frontal view; 5b: entire trophi, frontal view; 5c: caudal view. Scale bars: 5a = 10 µm; 5b–5c = 20 µm.

FIGURES 2A–2I in Diversity of sessile rotifers (Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand

FIGURES 2A–2I. Acyclus sp.; Collotheca spp. 2a–2c: Acyclus sp.; 2d–2f: Collotheca algicola (Hudson, 1886); 2g–2i: Collotheca ambigua (Hudson, 1883). Scale bars: 2a–2c, 2d, 2g = 100 µm; 2e–2f, 2h–2i = 50 µm.

FIGURE 4 in Diversity of sessile rotifers (Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand

FIGURE 4. Lacinularoides coloniensis (Colledge, 1918) n. comb. 4a: adult female; 4b: corona, dorsal view, 4c: corona, ventro-lateral view. Scale bars: 4a = 200 µm; 4b–4c = 100 µm.

FIGURE 1 in Diversity of sessile rotifers (Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand

FIGURE 1. Thale Noi Lake, Thailand and the sampling stations (TN1-TN9), and Songkhla Lake (Map courtesy of GIS centre, PSU, Thailand, photographs courtesy of N. Chirapongsathonkul and K. U-taynapun).

FIGURE 9 in Diversity of sessile rotifers (Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand

FIGURE 9. Ptygura noodti (Koste, 1972) n. comb.: 9a–9b: tube structure in different specimens; 9c: Trophi SEM photograph, frontal view. Scale bars: 9a–9b = 100 µm; 9c = 5 µm.

FIGURE 8 in Diversity of sessile rotifers (Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand

FIGURE 8. Ptygura noodti (Koste, 1972) n. comb. 8a: adult female; 8b: contracted specimen, apical region showing the dorsal projections. Scale bars: 8a = 100 µm; 8b = 50 µm.

FIGURES 3A–3F. Collotheca spp. 3a–c in Diversity of sessile rotifers (Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand

FIGURES 3A–3F. Collotheca spp. 3a–c: Collotheca campanulata (Dobie, 1849); 3d–3f: Collotheca trilobata (Collins, 1872). Scale bars: 3a–3f = 100 µm.

FIGURE 14 in Two new brackish-water species of Testudinella (Rotifera: Testudinellidae) from Qi'ao Island in the Pearl River estuary, China, with a key to marine and brackish-water Testudinella

FIGURE 14. Testudinella zhujiangensis, scanning electron microscope photograph of trophi. A. Detail of ramus, caudal view. B. Detail of rami, frontal view. al: alula, as: arched rami scleropili, fs: frontal rami scleropili, ra: ramus apophysis

FIGURE 4 in Two new brackish-water species of Testudinella (Rotifera: Testudinellidae) from Qi'ao Island in the Pearl River estuary, China, with a key to marine and brackish-water Testudinella

FIGURE 4. Testudinella pseudobscura sp. nov., scanning electron microscope photograph of trophi. Detail of major teeth and proximal part of fulcrum, frontal view. ba: basal apophysis, fo: fulcrum opening

FIGURE 11 in Two new brackish-water species of Testudinella (Rotifera: Testudinellidae) from Qi'ao Island in the Pearl River estuary, China, with a key to marine and brackish-water Testudinella

FIGURE 11. Testudinella quadrilobata sp. nov., scanning electron microscope photograph of trophi. Detail of major teeth and proximal part of fulcrum, frontal view. ba: basal apophysis, fo: fulcrum opening.