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668 results for “polychaetes”
Figure 9 in Nereidid polychaetes (Annelida) inhabiting the inside of decaying fronds of the mangrove palm Nypa fruticans in a tropical estuary in Malaysia, with special reference to the life history of the dominant species, Namalycastis sp.
Figure 9. Gut contents of Namalycastis sp. (a, b) Plant cells (a) and plant fibres (b) in an individual collected from Station 2 on 27 July 2016. (c, d) Fragments of nereidid parapodia with aciculae (c) and chaetae (d) in another individual collected from Station 5 in 27 July 2016. Scale bars: a, c = 0.1 mm; b= 1 mm; d = 0.05 mm.
Figure 6 in Nereidid polychaetes (Annelida) inhabiting the inside of decaying fronds of the mangrove palm Nypa fruticans in a tropical estuary in Malaysia, with special reference to the life history of the dominant species, Namalycastis sp.
Figure 6. Namalycastis sp., UMT-Ann 1741 (4.1 mm BW, 180 mm BL) collected at Station 2 on 27 November 2015. (a) Sesquigomph spiniger in notochaetae, chaetiger 93. (b) Sesquigomph spiniger in upper neurochaetae, chaetiger 93. (c) Heterogomph spiniger with finely serrated blade in lower neurochaetae, chaetiger 142. (d) Heterogomph spiniger having blade with coarse serrations proximally, chaetiger 111. (e–h) Heterogomph falcigers with finely serrated blade in upper (e, g) and lower (f, h, i) neurochaetae in chaetigers 10 (e, f), 93 (g, h), and 142 (i). (j) Heterogomph falciger with coarsely serrated blade proximally in lower neurochaetae of chaetiger 142. Scale bar 0.1 mm.
Figure 15 in Nereidid polychaetes (Annelida) inhabiting the inside of decaying fronds of the mangrove palm Nypa fruticans in a tropical estuary in Malaysia, with special reference to the life history of the dominant species, Namalycastis sp.
Figure 15. Size–frequency histograms of females (a), males (b), and individuals with sex undetermined (c) of Namalycastis sp. based on pooled data from all seven collections from September 2015 to September 2016 at six sites in Setiu Wetlands, Terengganu, in Malaysia (Table 1). n: total number of samples.
Figure 18 in Nereidid polychaetes (Annelida) inhabiting the inside of decaying fronds of the mangrove palm Nypa fruticans in a tropical estuary in Malaysia, with special reference to the life history of the dominant species, Namalycastis sp.
Figure 18. Seasonal change in ratio of females, males, adults with sex undetermined and juveniles in pooled samples of Namalycastis sp. collected from six sites in Setiu Wetlands, Terengganu, in Malaysia via seven samplings in the period from September 2015 to September 2016. The number at the top of each bar is the number of specimens examined.
Figure 17 in Nereidid polychaetes (Annelida) inhabiting the inside of decaying fronds of the mangrove palm Nypa fruticans in a tropical estuary in Malaysia, with special reference to the life history of the dominant species, Namalycastis sp.
Figure 17. Seasonal change in size–frequency histogram of pooled samples of Namalycastis sp. collected from six sites in Setiu Wetlands, Terengganu, in Malaysia from seven samplings in the period from September 2015 to September 2016.
Figure 5 in Nereidid polychaetes (Annelida) inhabiting the inside of decaying fronds of the mangrove palm Nypa fruticans in a tropical estuary in Malaysia, with special reference to the life history of the dominant species, Namalycastis sp.
Figure 5. Living (a, b) and preserved (c–i) specimens of Namalycastis sp. (a) Pale purple worm collected from Station 2 on 28 March 2016. (b) Greenish dark-brown worm collected from Station 5 on 28 September 2016. (c) Specimen with dark-brown pigmentation throughout, collected from Station 1 on 30 September 2015. (d) Whitish specimen, with anterior-most segments light brown, collected from Station 3 on 18 May 2016. (e–g) Light brown specimen (UMT-Ann 1712) collected at Station 2 on 30 September 2015, dorsal view: (e) Anterior end with everted proboscis; (f) Middle body; (g) Posterior end. (h) Anterior end of dark brown specimen, with everted proboscis (UMT-Ann 1707), collected from Station 1 on 30 September 2015, dorsal view. (i) Anterior end of whitish-cream specimen with brownish pigmentation in prostomium and a few anterior-most segments (UMT-Ann 1724), collected from Station 1 on 27 November 2015, dorsal view. Scale bars: c, d = 10 mm; e–i = 1 mm.
Figure 3 in Nereidid polychaetes (Annelida) inhabiting the inside of decaying fronds of the mangrove palm Nypa fruticans in a tropical estuary in Malaysia, with special reference to the life history of the dominant species, Namalycastis sp.
Figure 3. Coelomic cells in gametogenesis of Namalycastis sp. (a) Oocyte of a female individual collected from Station 6 on 27 November 2015. (b) Round cluster of spermatogonia or spermatocytes of a male individual collected from Station 4 on 28 September 2016. Scale bars: 0.05 mm.
Figure 2 in Nereidid polychaetes (Annelida) inhabiting the inside of decaying fronds of the mangrove palm Nypa fruticans in a tropical estuary in Malaysia, with special reference to the life history of the dominant species, Namalycastis sp.
Figure 2. Map showing seven sampling sites and distributions of three nereidid species along the lagoon of Setiu Wetlands, Terengganu, on the eastern coast of Peninsular Malaysia. M, Station M (Muara Kuala Setiu); 1, Station 1 (Beting Lintang); 2, Station 2 (in front of Pulau Tebing Tinggi); 3, Station 3 (in front of Pulau Che Hing); 4, Station 4 (in front of Pulau Gemia); 5, Station 5 (northern stream in front of Pulau Awang Jin); 6, Station 6 (southern stream in front of Pulau Awang Jin). Filled circles, Namalycastis sp.; open circle, N. rhodochorde; filled triangles, Perinereis aibuhitensis. Arrow indicates the single opening of Setiu Wetlands.
Figure 14 in Nereidid polychaetes (Annelida) inhabiting the inside of decaying fronds of the mangrove palm Nypa fruticans in a tropical estuary in Malaysia, with special reference to the life history of the dominant species, Namalycastis sp.
Figure 14. Perinereis aibuhitensis (UMT-Ann 2191). (a) Anterior end with everted proboscis, dorsal view. (b) Middle body, dorsal view. (c) Posterior end, dorsal view. (d–f) Posterior views of parapodia in chaetigers 25 (d), 65 (e), and 104 (f). (g) Homogomph spiniger in notochaetae, chaetiger 25. (h) Homogomph spiniger in upper neurochaetae, chaetiger 65. (i) Heterogomph spiniger in lower neurochaetae, chaetiger 65. (j) Heterogomph falciger in upper neurochaetae, chaetiger 25. (k) Heterogomph falciger in lower neurochaetae, chaetiger 65. Scale bars: a–c = 1 mm; d–f = 0.2 mm; g–i = 0.1 mm; j, k = 0.05 mm.
Figure 12 in Nereidid polychaetes (Annelida) inhabiting the inside of decaying fronds of the mangrove palm Nypa fruticans in a tropical estuary in Malaysia, with special reference to the life history of the dominant species, Namalycastis sp.
Figure 12. Namalycastis rhodochorde, UMT-Ann 2270. Chaetae in chaetiger 51. (a) Sesquigomph spiniger in upper neurochaetae. (b) Heterogomph falciger in upper neurochaetae. (c) Heterogomph falciger in lower neurochaetae. Scale bars: 0.1 mm.
Figure 11 in Nereidid polychaetes (Annelida) inhabiting the inside of decaying fronds of the mangrove palm Nypa fruticans in a tropical estuary in Malaysia, with special reference to the life history of the dominant species, Namalycastis sp.
Figure 11. Namalycastis rhodochorde, UMT-Ann 2270. Parapodium of chaetiger 101, posterior view. Scale bar: 0.2 mm.
Figure 6. Mismatch distributions. A in Comparative phylogeography of two symbiotic dorvilleid polychaetes (Iphitime cuenoti and Ophryotrocha mediterranea) with contrasting host and bathymetric patterns
Figure 6. Mismatch distributions. A, graph for Iphitime cuenoti, represents the mismatch distribution for western Mediterranean basin and Atlantic waters. Graphs for Ophryotrocha mediterranea: B, complete population from the western Mediterranean; C-D, for lineages L1 and L2, respectively. Exp, expected; Obs, observed; SSD, the sum of square deviations between the expected and the observed mismatch. TAU, Theta0 and Theta1 are the mismatch model parameters: TAU, units of mutational time; Theta0, initial population size at equilibrium; Theta1, new population size after growth or shrink.
Figure 5. A in Comparative phylogeography of two symbiotic dorvilleid polychaetes (Iphitime cuenoti and Ophryotrocha mediterranea) with contrasting host and bathymetric patterns
Figure 5. A, median-joining haplotype networks of mtDNA cytochrome c oxidase subunit I sequences for Ophryotrocha mediterranea. Empty circles represent missing haplotypes. Black points represent mutational steps. Circle size and pie size are proportional to the haplotype frequency. B, haplotype distribution in the studied populations of both lineages 1 and 2. WALB, western Alborán; EALB, eastern Alborán; ALBI, Alborán Island; VALE, Valencia; NCAT, northern Catalunya; ALAC, Alicante.
Figure 2. A in Comparative phylogeography of two symbiotic dorvilleid polychaetes (Iphitime cuenoti and Ophryotrocha mediterranea) with contrasting host and bathymetric patterns
Figure 2. A, Iphitime cuenoti, male. B, Iphitime cuenoti, female. C, Ophryotrocha mediterranea. D, Liocarcinus depurator. E, Goneplax rhomboides. F, Macropipus tuberculatus. G, Bathynectes maravigna. H, Geryon longipes.
Figure 4 in Comparative phylogeography of two symbiotic dorvilleid polychaetes (Iphitime cuenoti and Ophryotrocha mediterranea) with contrasting host and bathymetric patterns
Figure 4. Median-joining haplotype networks of mtDNA cytochrome c oxidase subunit I sequences for Iphitime cuenoti in relation to its host crab. Empty circles represent missing haplotypes. Black points represent mutational steps. Circle size and pie size are proportional to the haplotype frequency.
FIGURE 3 in New records for associations between peritrich protozoan ciliates (Ciliophora, Sessilida) and polychaete worms (Annelida) from off the southeastern coast of India
FIGURE 3. Specimens of Epistylis sp.2 on Namalycastis abiuma. (A). Entire worm, dorsal view; (B). Colony of Epistylis sp.2 on parapodial dorsal cirrus; (C). Solitary Epistylis sp.2 on parapodial dorsal cirrus; (D). Premature juvenile Epistylis sp. 2, on parapodial ventral cirrus; most specimens measured along longitudinal axis. White arrow points to folds of the posterior region of zooid; yellow arrow points to projecting tube formed by constriction of the peristomial lip, red arrow points to macronucleus.
FIGURE 4 in New records for associations between peritrich protozoan ciliates (Ciliophora, Sessilida) and polychaete worms (Annelida) from off the southeastern coast of India
FIGURE 4. Specimens of Cothurnia sp. on Sabellaria sp. (A). Entire worm, dorsal view; (B, C). Specimens of Cothurnia sp. on paleae of the anterior region of the worm.
FIGURE 2 in New entoproct-polychaete association recorded in the Bay of Bengal, southeastern coast of India
FIGURE 2. Diopatra sp. light micrographs. A, anterior end, dorsal view; B, posterior end, dorsal view; C, parapodium from the first chaetiger, anterior view; D, parapodium from the second chaetiger, anterior view; E, parapodium from the abdomenal chaetiger with the specimens of Loxosomella diopatricola on the gill (arrowheads), anterior view; F, the chaeta of the first parapodium which penetrates the dorsal cirri; G, limbate chaetae of the first parapodium; H, aciculae of the first parapodium; I, upper pseudocompound hook of the first parapodium; J, median pseudocompound hook of the first parapodium; K, limbate chaetae of the second parapodium; L, upper pseudocompound hook of the second parapodium; M-N, median pseudocompound hook of the second parapodium; O, ventral pseudocompound hook of the second parapodium; P, pectinate chaetae of the fifth parapodium; List of abbreviations: A, ul, upper lips; cr, ceratophore rings; pa, palps; an, antennae; arrowheads point on the specimens of Loxosomella diopatricola. C-D, dc, dorsal cirrus; prl, Prechaetal lobe; ptl, Postchaetal lobe; vc, ventral cirrus. Scale bars; F-P= 50 μm.
FIGURE 4 in New entoproct-polychaete association recorded in the Bay of Bengal, southeastern coast of India
FIGURE 4. Various morphological views of Loxosomella diopatricola, light micrographs. A, lateral view of a specimen with a short stalk; B, frontal view of a specimen with a short stalk; C, lateral view of a specimen with two buds; D, frontal view of a specimen with a short stalk; E, lateral view of a specimen; F, frontolateral view of a specimen; G, frontolateral view of a specimen; H, frontal view of a specimen attached to the gill; I, lateral view of a specimen; J, lateral view of a specimen; K, frontolateral view of a specimen; L, lateral view of a specimen.
FIGURE 3 in New entoproct-polychaete association recorded in the Bay of Bengal, southeastern coast of India
FIGURE 3. Parapodia chaeta from the chaetiger of the middle part of the body. A, upper limbate chaetae; B, lower limbate chaetae; C, upper aciculae; D, median aciculae with strongly bended distal end; E, bidentate subacicular hook; F, long pectinate chaetae; G, median pectinate chaetae; H, lower pectinate chaetae. Scale bars; A, B & D= 50 μm; C, E-H= 75 μm.
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