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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 9. Floscularia pedunculata. A. Corona, dorsal view. B. Corona, lateral view. C. Corona closed, ventral view. D in Key to sessile gnesiotrochan rotifers: Floscularia (Monogononta; Flosculariidae)

FIGURE 9. Floscularia pedunculata. A. Corona, dorsal view. B. Corona, lateral view. C. Corona closed, ventral view. D. Long peduncle. Symbols: arrow = modulus; a = antennae; cop = conical processes; f = foot; m = mouth; pd = peduncle; qcp = quadridigitate, cuticular processes. Bars = 100 µm. (Reproduced from original art courtesy of W.T. Edmondson.)

FIGURE 8. Floscularia decora. A. Ventral anterior view. B and C. Mucrons. B. Lateral view. C in Key to sessile gnesiotrochan rotifers: Floscularia (Monogononta; Flosculariidae)

FIGURE 8. Floscularia decora. A. Ventral anterior view. B and C. Mucrons. B. Lateral view. C. Ventral view. Symbols: a = antenna (right side); hp = hexagonal, bullet-shaped pellets; la = labium; mo = modulus. (Reproduced from original art courtesy of W.T. Edmondson).

FIGURE 6. Floscularia armata. A in Key to sessile gnesiotrochan rotifers: Floscularia (Monogononta; Flosculariidae)

FIGURE 6. Floscularia armata. A. Trophi (caudal view). B. Apical region, ventral view showing mucrons and ventrolateral antennae. Dotted oval: variations of the mucrons and accessory projections may occur in different specimens: consult the original descriptions in Segers (1997). Scale bars: as indicated. (Reproduced with permission from the copyright holder [Hydrobiologia 354: 165–175] and the author (Segers 1997)).

FIGURE 5. Floscularia bifida. A. Trophi, caudal view. B in Key to sessile gnesiotrochan rotifers: Floscularia (Monogononta; Flosculariidae)

FIGURE 5. Floscularia bifida. A. Trophi, caudal view. B. Apical region, ventral view showing mucrons and ventrolateral antennae. Scale bars: as indicated. (Reproduced with permission from the copyright holder [Hydrobiologia 354: 165–175] and the author (Segers 1997)).

FIGURE 11. Floscularia wallacei. A in Key to sessile gnesiotrochan rotifers: Floscularia (Monogononta; Flosculariidae)

FIGURE 11. Floscularia wallacei. A. From culture, young (left) and adult (right). B. Corona, lateral view. C. Corona, dorsal view. D. Mucrons, lateral view. E. Trophi, frontal view. F. Trophi, caudal view. Scale bars: A ~500 µm; D, E, F = 10 µm. (©Magnolia Press, reproduced with permission from the copyright holder [Zootaxa 1750: 19–31] and the authors (Segers & Shiel 2008).)

FIGURE 3. Floscularia janus. A in Key to sessile gnesiotrochan rotifers: Floscularia (Monogononta; Flosculariidae)

FIGURE 3. Floscularia janus. A. Dorsal view of an animal in its tube. B. Lateral view of an animal in its tube. C. Lateral view of an animal removed from its tube. D. Dorsal view of the corona showing medial notch in the labium. Symbols: arrows = modulus; a = antenna; an = anus; fp = fecal pellet; gt = elements of the gelatinous tube; lb = labium; m = mouth; S = substratum. Bar = 500 µm. (B = From Hudson, 1881; C = Reproduced from original art courtesy of W.T. Edmondson.)

FIGURE 2 in Key to sessile gnesiotrochan rotifers: Floscularia (Monogononta; Flosculariidae)

FIGURE 2. Examples of critical characteristics used in differentiating Floscularia species. (See Table 1 for additional information.) A, B. Anterior ends showing features of the corona. A. Corona lateral view of F. conifera: tripartite pellet-forming organ (encircled with dotted line) with a pellet (p) in the modulus; B. Corona ventrolateral view of F. melicerta. C. Presence (F. conifera and F. decora) or absence (F. janus) of mucrons. D. Long peduncle of F. pedunculata; Insert: illustrations of two Floscularia spp. lacking peduncles. E. Examples of trophi showing weekly and strongly differentiated unci teeth. F. Examples of allorecruitive colony formation (three small colonies). Tubes in the upper left colony with rings (Edmondson 1945) for details. Symbols: d = debris; dl = dorsal lobe; f = foot; gt = gelatinous tube: dotted line indicates tube; i = insertion point of peduncle to foot; m = mouth; pd = peduncle; pt = pellet tube; s = substratum; sf = stem female of colony; tr = trophi in mastax; vl = ventral lobe; vla = ventrolateral antenna. A, C = Reproduced from original art courtesy of W.T. Edmondson; D. After. Joliet 1883; E. (Reproduced with permission from the copyright holder [Hydrobiologia 354: 165–175; (Segers 1997)).

FIGURE 1 in Key to sessile gnesiotrochan rotifers: Floscularia (Monogononta; Flosculariidae)

FIGURE 1. Schematic representations of the coronal margins of the nine genera of Flosculariidae. Images are not to scale. The corona is developed into two concentric rings that beat in a metachronous pattern thereby producing feeding currents: trochus (—–); cingulum (– – –) (Wallace 2002). Adapted after Bielańska-Grajner et al. (2015), Colledge (1918), Koste (1978, 1989), and Remane (1929–1933); Pentatrocha (©Magnolia Press, reproduced with permission from the copyright holder [Zootaxa 1750: 19–31] and the authors (Segers & Shiel 2008)).

FIGURE 7. Floscularia melicerta. A. Anterio-ventral view. B. 3 in Key to sessile gnesiotrochan rotifers: Floscularia (Monogononta; Flosculariidae)

FIGURE 7. Floscularia melicerta. A. Anterio-ventral view. B. 3/4th Anterio-ventral view. C. Lateral view with little debris incorporated into its gelatinous tube; D. lateral view—tube with copious amounts of debris obscuring the gelatinous tube. A and B: Dashes outline the periphery of the gelatinous tube. Symbols: a = antenna; d = small bit of debris in the tube; gt = gelatinous tube; m = modulus; S = substratum. Bars: A, B = 100 µm; C, D = 500 µm. (C = From Hudson 1875.)

FIGURE 4. Floscularia conifera. A in Key to sessile gnesiotrochan rotifers: Floscularia (Monogononta; Flosculariidae)

FIGURE 4. Floscularia conifera. A. Lateral view of the anterior end. B. Small colony with three individuals attached to a stem female (sf). C. Rings of dark pellets formed after three successive rain storms that took place over approximately three days: consult Edmondson (1945). D. Damaged tube of a solitary individual. Symbols: arrow = modulus with a dark pellet being formed; a = antenna; cm = colony mates; d = damaged region; lb = labium; m = mouth; mx = mastax; pt = pellet tube; r = rings of dark pellets; S = substratum; sf = stem female (previously solitary). Bars = 500 µm. (A. Reproduced from original art courtesy of W.T. Edmondson.)

FIG. 10. Floscularia ringens. A in Key to sessile gnesiotrochan rotifers: Floscularia (Monogononta; Flosculariidae)

FIG. 10. Floscularia ringens. A. Ventral view of an adult. B. Frontal view of trophi. C. Caudal view of trophi. Symbols: a = antenna; lb = labium; m = mouth pt = pellet tube; pt = pellet tube; slb = sublabium; Bars: as indicated. (Reproduced with permission from the copyright holder [Invertebrate Biology 122:231–240] and the authors (Fontaneto et al. 2003).)