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FIGURE 6 in Redescription of Manayunkia caspica Annenkova, 1929 and M. danubialis Băcescu, 1944 n. comb. (Fabriciidae, Sabellida, Polychaeta)

FIGURE 6. Manayunkia danubialis Băcescu, 1944 n. comb., SEM micrographs. A. Total view of a complete specimen, lateral view. B. Anterior end, dorso-lateral view. C. Anterior end, ventral view. D Posterior end, lateral view; arrow pointing to the shift of the position of the faecal groove. E. Total view of a female, dorso-lateral view. F. Posterior end with anal opening and faecal groove, ventral view. G. Chaetigers 7 and 8; note the orientation of the thoracal uncini. H. Posterior end; lateral view. I. Posterior end of pygidium; arrows pointing to fields of epidermal gland openings. Scale bars. A, E 200 µm, B–D, F, G 100 µm, H, I 20 µm.

FIGURE 4. Manayunkia caspica Annenkova, 1929 in Redescription of Manayunkia caspica Annenkova, 1929 and M. danubialis Băcescu, 1944 n. comb. (Fabriciidae, Sabellida, Polychaeta)

FIGURE 4. Manayunkia caspica Annenkova, 1929, semithin sections (1 µm) through radiolar crown. A. Branches of radioles and ventral vascularized filamentous appendages, all separated. B. Branches of ventral and median radioles start to fuse (110 µm basal of section A). C. Fusion of branches of ventral and median radioles continues, dorsal radioles still separated; dorsal lips visible (30 µm basal of section B; note: dorsal radiole of the right and left half of the radiolar crown lettered). D. Ventral and median radioles fused, dorsal radioles and dorsal lips separated (12 µm basal of section C). E. Radioles fused, and connected to ventral vascularized filamentous appendage by dorsal lips, except left dorsal radiole (10 µm basal of section D). F. Radioles completely fused, ventral anterior peristomial ring lobe visible (30 µm basal of section E). Scale bars A–F 100 µm (abbr: dl dorsal lips, dr dorsal radiole, mr median radiole, v aprl ventral anterior peristomial ring lobe, vr ventral radiole, vvfa ventral vascularized filamentous appendages).

FIGURE 2. Manayunkia caspica Annenkova, 1929, SEM micrographs. A in Redescription of Manayunkia caspica Annenkova, 1929 and M. danubialis Băcescu, 1944 n. comb. (Fabriciidae, Sabellida, Polychaeta)

FIGURE 2. Manayunkia caspica Annenkova, 1929, SEM micrographs. A. Total view of a complete specimen, ventro-lateral view. B. Anterior end, ventral view. C. Anterior end, dorsal view. D. Outside of a flexible tube consisting of finest sediment particles and mucus. E. Anterior end up to chaetiger 3, ventral view. F. Brood chamber on chaetigers 6 and 7. G. Posterior margin of the brood chamber on segment 7. H. Isolated egg from a female tube. I. Posterior end with last thoracic chaetiger (=chaetiger 8) and first abdominal chaetiger (=chaetiger 9), lateral view. Scale bars. A, F, G, I 200 µm, B, C, H 50 µm, D, E 100 µm (abbr: apr anterior peristomial ring, ch1,8,9 chaetiger 1,8,9, fg faecal groove, ppr posterior peristomial ring, vvfa unbranched ventral vascularized filamentous appendages).

FIGURE 7 in Redescription of Manayunkia caspica Annenkova, 1929 and M. danubialis Băcescu, 1944 n. comb. (Fabriciidae, Sabellida, Polychaeta)

FIGURE 7. Manayunkia danubialis Băcescu, 1944 n. comb., SEM micrographs. A. Notopodium of chaetiger 1 with short and long, narrowly hooded chaetae. B. Notopodium of chaetiger 2 with pseudo-spatulate and long narrowly hooded chaetae. C. Pseudo-spatulate chaetae of chaetiger 3. D. Inferior thoracic notochaetae of chaetiger 7. E. Abdominal neurochaetae of chaetiger 9. F. Thoracic uncini of chaetiger 2. G. Thoracic neuropodium of chaetiger 3; note the slightly offset arrangement of uncini. H. Transitional uncini of chaetiger 8. I. Abdominal uncini of chaetiger 9. Scale bars. A, B 20 µm, C–E, I 5 µm, F, H 2 µm, G 10 µm.

FIGURE 1 in Redescription of Manayunkia caspica Annenkova, 1929 and M. danubialis Băcescu, 1944 n. comb. (Fabriciidae, Sabellida, Polychaeta)

FIGURE 1. Map showing locations in the Caspian Sea (red square) and the Austrian Danube (red circle) where specimens of Manayunkia caspica Annenkova, 1929 and M. danubialis Băcescu, 1944 n. comb. were collected.

FIGURE 3 in The invertebrate host of salmonid fish parasites Ceratonova shasta and Parvicapsula minibicornis (Cnidaria: Myxozoa), is a novel fabriciid annelid, Manayunkia occidentalis sp. nov. (Sabellida: Fabriciidae)

FIGURE 3. Images showing chaetal characters of Manayunkia occidentalis sp. nov.: A, inferior and superior notochaete typical of thoracic segments 2–8; B, thoracic uncini; C, abdominal uncini; D, dorsal view of posterior thoracic segments and abdomen of male showing typical uncini in chaetigers t7 and t8 (arrowheads) and in scanning electron micrograph shown in F; E, dorsal view of posterior thoracic segments and abdomen of female showing neuropodia of thoracic chaetigers 6–8 with elongate neuropodia instead of uncini, seen also in scanning electron micrograph in G (arrowhead). H, anterior thoracic segment of female showing notochaetae and uncini (arrowhead), characteristic of thoracic segments 2–5 in both sexes.

FIGURE 2 in The invertebrate host of salmonid fish parasites Ceratonova shasta and Parvicapsula minibicornis (Cnidaria: Myxozoa), is a novel fabriciid annelid, Manayunkia occidentalis sp. nov. (Sabellida: Fabriciidae)

FIGURE 2. Gross morphological features of Manayunkia occidentalis sp. nov. resolved by light microscopy: A, multiple individuals emerged and feeding from their tubes; B, Individual annelid with prominent vascularized appendages (va) and showing refractile spots on one feeding palp on each side (arrowheads); C, female in reflected light, showing white oocytes (o) in segments 4–6; D, male in reflected light showing bright spermatogonic tissue (sp) in multiple posterior segments; E, Male in transmitted light showing parallel vascularized appendages (va) and fanned-out feeding palps anteriorly with two dark eyespots in peristomium, and granular coelom posteriorly due to presence of developing sperm.

FIGURE 1 in The invertebrate host of salmonid fish parasites Ceratonova shasta and Parvicapsula minibicornis (Cnidaria: Myxozoa), is a novel fabriciid annelid, Manayunkia occidentalis sp. nov. (Sabellida: Fabriciidae)

FIGURE 1. Manayunkia occidentalis sp. nov. from the Klamath River, CA, infected with myxozoan parasites Ceratonova shasta (A–C) and Parvicapsula minibicornis (D–F). A, bright field image of C. shasta actinospores (arrowheads) in tegument; B, Nomarski interference contrast image of C. shasta pansporocyst in tegument; C, Individual tetractinomyxon type actinospores of C. shasta; D, bright field image of P. minibicornis actinospores (arrowhead) in coelom of infected annelid; E, mass of developing P. minibicornis spores in coelom; F, Individual saccimyxon type actinospores of P. minibicornis; morphologies after Atkinson et al. (2019).

FIGURE 5 in The invertebrate host of salmonid fish parasites Ceratonova shasta and Parvicapsula minibicornis (Cnidaria: Myxozoa), is a novel fabriciid annelid, Manayunkia occidentalis sp. nov. (Sabellida: Fabriciidae)

FIGURE 5. Phylogram from Maximum Likelihood (ML) analysis of COI data for representative Manayunkia species, with bootstrap values given at nodes and GenBank accession numbers given in parentheses; novel sequences indicated by boldface. Bayesian analysis gave equivalent tree topology (posterior probabilities shown after ML bootstrap values at nodes).

FIGURE 4 in The invertebrate host of salmonid fish parasites Ceratonova shasta and Parvicapsula minibicornis (Cnidaria: Myxozoa), is a novel fabriciid annelid, Manayunkia occidentalis sp. nov. (Sabellida: Fabriciidae)

FIGURE 4. Morphological features of Manayunkia occidentalis sp. nov. resolved by scanning electron microscopy: A, lateral view; B, dorsal view; C, ventral view; D, anterior showing membranous collar (c) of the peristomal ring (pr), margin with fecal groove (fg); mucus covers the pinnules and adheres diatoms; E, detail of typical thoracic uncini; F, abdominal segments and anus, showing ciliated fecal groove extending anteriorly and wrapping around to the ventral surface at boundary between abdominal and thoracic segments; G, lateral view of thoracic segments showing contracted uncini and prominent neuropodia; H, higher magnification view of retracted abdominal uncini.

FIGURE 5. Manayunkia caspica Annenkova, 1929 in Redescription of Manayunkia caspica Annenkova, 1929 and M. danubialis Băcescu, 1944 n. comb. (Fabriciidae, Sabellida, Polychaeta)

FIGURE 5. Manayunkia caspica Annenkova, 1929, semithin sections (1 µm) through base of radiolar crown. A. Base of radiolar crown, branchial heart dorsally. B. Cross-section through the peristomial region lobe with cerebral ganglion and peristomial eyes (28 µm basal of section A). Scale bars A, B 100 µm (abbr: aprl anterior peristomial ring lobe, bh branchial heart, cg cerebral ganglion, fg faecal groove, np nephropore, oe oesophagus, pe peristomial eye, vvfa ventral vascularized filamentous appendages).

FIGURE 8 in Redescription of Manayunkia caspica Annenkova, 1929 and M. danubialis Băcescu, 1944 n. comb. (Fabriciidae, Sabellida, Polychaeta)

FIGURE 8. Manayunkia danubialis Băcescu, 1944 n. comb., semithin sections (1 µm) through radiolar crown. A. Branches of radioles and ventral vascularized filamentous appendages, all separated. B. Branches of ventral and median radioles start to fuse; left dorsal lip visible (100 µm basal of section A). C. Fusion of branches of ventral and median radioles continues, dorsal radioles still separated; dorsal lips visible (28 µm basal of section B). D. Left ventral and median radioles fused, dorsal radioles still separated; left ventral vascularized filamentous appendage and dorsal lip fused (16 µm basal of section C). E. Radioles fused, and connected to ventral vascularized filamentous appendage by dorsal lips (40 µm basal of section D). F. Branchial heart dorsally, and ventral anterior peristomial ring lobe visible (16 µm basal of section E). Scale bars A–F 100 µm (abbr: bh branchial heart, dl dorsal lips, dr dorsal radiole, mr median radiole, v aprl ventral anterior peristomial ring lobe, vr ventral radiole, vvfa ventral vascularized filamentous appendages).

FIGURE 9 in Redescription of Manayunkia caspica Annenkova, 1929 and M. danubialis Băcescu, 1944 n. comb. (Fabriciidae, Sabellida, Polychaeta)

FIGURE 9. Manayunkia danubialis Băcescu, 1944 n. comb., semithin sections (1 µm) through base of radiolar crown. A. Base of radiolar crown, junction of the blood vessel from dorsal branchial heart to ventral vascularized filamentous appendages visible. B. Cross-section through the peristomial region lobe (43 µm basal of section A). Scale bars A, B 100 µm (abbr: aprl anterior peristomial ring lobe, bh branchial heart, fg faecal groove, np nephropore, oe oesophagus, vvfa ventral vascularized filamentous appendages).

FIGURE 3. Manayunkia caspica Annenkova, 1929, SEM micrographs. A in Redescription of Manayunkia caspica Annenkova, 1929 and M. danubialis Băcescu, 1944 n. comb. (Fabriciidae, Sabellida, Polychaeta)

FIGURE 3. Manayunkia caspica Annenkova, 1929, SEM micrographs. A. Notopodium of chaetiger 3 with long narrowly hooded and pseudospatulate chaetae. B. Long narrowly hooded chaetae of chaetiger 3. C. Pseudo-spatulate chaetae of chaetiger 3. D–F. Thoracic uncini, different views. G–H. Transitional uncini of posterior thoracic neuropodia. I. Abdominal narrowly hooded chaetae. K. Abdominal uncini of chaetiger 9. Scale bars. A, B, I 10 µm, C–H, K 5 µm.