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Fig. 2 in "Something old, something new, something borrowed, and the oioxeny is true": description of Plectanocotyle jeanloujustinei n. sp. (Polyopisthocotylea, Plectanocotylidae) from the MNHN Helminthology collection with novel molecular and morphological data for P. gurnardi (Van Beneden & Hesse, 1863) (sensu stricto) from Sweden

Fig. 2. Plectanocotyle gurnardi (Van Beneden and Hesse, 1863) sensu stricto ex Eutrigla gurnardus from the North Sea, Sweden, hologenophores, body lacking only a lateral part; excised used for DNA extraction A, (SMNH 216644). B, (SMNH 216645). C, (SMNH 216646).

Fig. 5 in A critically co-endangered feather louse Forficuloecus pezopori n. sp. (Phthiraptera: Philopteridae) detected through conservation intervention for the western ground parrot Pezoporus flaviventris (Psittaculidae)

Fig. 5. Forficuloecus pezopori Martin, Keatley & Ash n. sp., dorsal (left) and ventral perspective, A. female allotype posterior terminus with egg, B. female alloptype anterior dorsal plate, C. male holotype posterior terminus, D. male holotype terminal genitalia. Tergopleurites and sternopleurites labelled with Roman numerals. Abbreviations: a, basal apodeme; e, endomere; m, mesosomal plate; p, paramere; sgp, subgenital plate; svs, subvulvular sclerite; t, telomere. Scale bars: 200 μm.

Fig. 1 in "Something old, something new, something borrowed, and the oioxeny is true": description of Plectanocotyle jeanloujustinei n. sp. (Polyopisthocotylea, Plectanocotylidae) from the MNHN Helminthology collection with novel molecular and morphological data for P. gurnardi (Van Beneden & Hesse, 1863) (sensu stricto) from Sweden

Fig. 1. One of the unstudied specimens of Plectanocotyle gurnardi (Van Beneden and Hesse, 1863) from the type-host Eutrigla gurnardus available for study before this paper, and that hinted the presence of Plectanocotyle gurnardi in Swedish waters of the North Sea. The slide containing two specimens of Plectanocotyle gurnardi labeled as "Phyllocotyle gurnardi": unstudied specimens collected by Theodor Odhner from the gills of Eutrigla gurnardus from Kristineberg, Sweden, Northeast Atlantic.

Fig. 4 in Morphological and molecular characterisation of two closely related species: Myxobolus tihanyensis n. sp. and Myxobolus sandrae Reuss, 1906

Fig. 4. Histology sections of Perca fluviatilis using the haematoxylin and eosin (H & E) technique. (A–B) Sagittal section of the proximal region of the caudal fin. (A) Rounded plasmodia (p) developing in the mesenchyme (mh) closely attached to the bases of the rays (r), scale bar = 100 μm. (B) Higher magnification of plasmodiacontaining spores. Scale bar = 20 μm. (C–D) Transversal section of the caudal vertebrate region. (C) Plasmodia located between the hemal spine (hs) and muscular fibres (mf), scale bar = 200 μm. (D) Higher magnification of plasmodia containing spores (black arrows), scale bar = 20 μm.

Fig. 6 in "Something old, something new, something borrowed, and the oioxeny is true": description of Plectanocotyle jeanloujustinei n. sp. (Polyopisthocotylea, Plectanocotylidae) from the MNHN Helminthology collection with novel molecular and morphological data for P. gurnardi (Van Beneden & Hesse, 1863) (sensu stricto) from Sweden

Fig. 6. Plectanocotyle gurnardi (Van Beneden and Hesse, 1863) sensu stricto ex Eutrigla gurnardus from the North Sea, Sweden. A, Body, ventral view (SMNH 216639). B, Clamp, ventral view (SMNH 216593). C, Anterior end showing male copulatory organ, ventral view (SMNH 216586). D, Egg, (SMNH 216594).

Fig. 7 in "Something old, something new, something borrowed, and the oioxeny is true": description of Plectanocotyle jeanloujustinei n. sp. (Polyopisthocotylea, Plectanocotylidae) from the MNHN Helminthology collection with novel molecular and morphological data for P. gurnardi (Van Beneden & Hesse, 1863) (sensu stricto) from Sweden

Fig. 7. Plectanocotyle gurnardi (Van Beneden and Hesse, 1863) sensu stricto ex Eutrigla gurnardus from the North Sea, Sweden, disposition of clamps sclerites. A, Dorsal jaw. B, Ventral jaw. C, Clamp, ventral view (SMNH 216593). 3.2. Morphology

Fig. 3 in Morphological and molecular characterisation of two closely related species: Myxobolus tihanyensis n. sp. and Myxobolus sandrae Reuss, 1906

Fig. 3. Schematic drawings of the mature spore of Myxobolus tihanyensis n. sp. from the caudal fin of Perca fluviatilis (A) in frontal view, (B) in sutural view. Scale bar = 10 μm.

Fig. 2 in Morphological and molecular characterisation of two closely related species: Myxobolus tihanyensis n. sp. and Myxobolus sandrae Reuss, 1906

Fig. 2. Photomicrographs of Myxobolus tihanyensis n. sp. spores from Perca fluviatilis. (A–D) Myxobolus tihanyensis n. sp., and (E–H), Myxobolus sandrae from Sander lucioperca. (A, E) Numerous mature spores (s) illustrate an ovoid shape and two polar capsules (pc). (B, F) Ovoid spores with sutural markings (white arrows) with two polar capsules which contain coiled polar tubules (pf) (C, G) Spore in sutural view showing the suture (su) (D, H) Spores releasing the polar tubules (pf) and showing sutural markings. Figs. C, G and H represented spores stained with Lugol solution. Scale bars = 10 μm.

Fig. 4 in A critically co-endangered feather louse Forficuloecus pezopori n. sp. (Phthiraptera: Philopteridae) detected through conservation intervention for the western ground parrot Pezoporus flaviventris (Psittaculidae)

Fig. 4. Forficuloecus pezopori Martin, Keatley & Ash n. sp. male holotype, ventral perspective, A. proleg, B. metaleg, C. mesoleg. Scale bar: 200 μm.

Fig. 1 in A critically co-endangered feather louse Forficuloecus pezopori n. sp. (Phthiraptera: Philopteridae) detected through conservation intervention for the western ground parrot Pezoporus flaviventris (Psittaculidae)

Fig. 1. Inferred phylogeny for species of Forficuloecus based on maximum likelihood analysis of COI mtDNA. Nodal support are from 400 bootstrap replicates. The scale-bar indicates the expected number of substitutions per site.

Fig. 3 in A critically co-endangered feather louse Forficuloecus pezopori n. sp. (Phthiraptera: Philopteridae) detected through conservation intervention for the western ground parrot Pezoporus flaviventris (Psittaculidae)

Fig. 3. Forficuloecus pezopori Martin, Keatley & Ash n. sp. head, female paratype, dorsal (left) and ventral perspective. Abbreviations: ads, anterodorsal seta; as, anterior seta; avs, anteroventral seta; dsms, dorsal submarginal seta; mts, marginal temple seta; os, ocular seta; pas, preantennal seta; pcs, preconal seta; pns, postnodal seta; pts, posterior temple seta; vsms, ventral submarginal seta. Scale bar: 200 μm.

Fig. 2 in A critically co-endangered feather louse Forficuloecus pezopori n. sp. (Phthiraptera: Philopteridae) detected through conservation intervention for the western ground parrot Pezoporus flaviventris (Psittaculidae)

Fig. 2. Forficuloecus pezopori Martin, Keatley & Ash n. sp. habitus, female allotype, dorsal (left) and ventral perspective. Some variably absent setae added from reference to paratypes. Tergites and sternites labelled with Roman numerals. Abreviations: ms, mesosternum; pn, pronotum; ps, prosternum; pt, pterothorax; ss, spiracular seta; sgp, subgenital plate. Scale bar: 250 μm.

Fig. 5 in Ophiotaenia karipuna n. sp. (Eucestoda: Proteocephalidae), a parasite of Erythrolamprus miliaris (Linnaeus, 1758), with redescription of Ophiotaenia arandasi (Santos and Rolas, 1973) from the Brazilian Amazon

Fig. 5. Scanning electron micrographs of Ophiotaenia karipuna n. sp. A, subapical view of the scolex (arrows indicate apical organ). B, scolex latero–ventral view. C, detail of the apex of scolex (arrows indicate apical organ). D, tegument surface on the upper edge of the sucker. E, tegument surface of luminal region of suckers. F, tegument surface between suckers and neck. Scale–bars: A, B, 100 μm; C, E, 5 μm; D, 10 μm; F, 30 μm.

Figura 1 in Ophiotaenia karipuna n. sp. (Eucestoda: Proteocephalidae), a parasite of Erythrolamprus miliaris (Linnaeus, 1758), with redescription of Ophiotaenia arandasi (Santos and Rolas, 1973) from the Brazilian Amazon

Figura 1. Line drawings of Ophiotaenia arandasi. A, scolex, frontal view. B, mature proglottid. C, gravid proglottid. D, terminal genitalia, ventro–dorsal. E, fully formed egg with fully developed embryonic hooks in the oncosphere. F–G, sections at the level of the cirrus–sac and the ovary, respectively. Scale–bars: A, C 200 μm; B 100 μm; D 100 μm; E 25 μm; F, G 100 μm.

Fig. 7 in Description, life cycle, and development of the myxozoan Myxobolus rasmusseni n. sp. in fathead minnows, Pimephales promelas: A possible emerging pathogen in southern Alberta, Canada

Fig. 7. Coronal histological section of the anterior head region of a Myxobolus rasmusseni n. sp. infected fathead minnow. Approximately 8 myxospore-filled plasmodia are located between the two optic lobes in the anterior-dorsal region of the head cavity. Plasmodia demarcated from adjacent host tissue by a thin fibrocytic membrane that also encircles Ornithodiplostomum ptychocheilus metacercariae. 100X magnification. Op = Ornithodiplostomum ptychocheilus metacercariae, Olb: Optic lobe of the minnow brain, Ps: Plasmodia of Myxobolus rasmusseni n. sp. Inset demonstrates distribution of numerous stained and unstained myxospores located within plasmodia.

Fig. 8 in Description, life cycle, and development of the myxozoan Myxobolus rasmusseni n. sp. in fathead minnows, Pimephales promelas: A possible emerging pathogen in southern Alberta, Canada

Fig. 8. Size-frequency distributions of fathead minnows collected from two wetlands in southern Alberta. The left-hand triplet of graphs (A, B, C) indicates size distributions of the 2020 cohort of fathead minnows assessed in Sept. 2020, June 2021, and Sept. 2021 at McQuillan Reservoir. The right-hand triplet (D, E, F) indicates size distributions assessed at the same times for Coalhurst Stormwater Pond. Dark bars indicate minnows with M. rasmusseni n. sp. lesions.

Fig. 6 in Description, life cycle, and development of the myxozoan Myxobolus rasmusseni n. sp. in fathead minnows, Pimephales promelas: A possible emerging pathogen in southern Alberta, Canada

Fig. 6. Coronal histological section through the dorsal head region along the frontal plane of a fathead minnow that contained multiple, various-sized plasmodia of Myxobolus rasmusseni n. sp. 1.25X magnification. Rt - Retina of the eye, Ps - Plasmodia, Br - Brain, Ls - Lens of the eye, Ns - Nares, Of – Opercular flap.

Fig. 5 in Description, life cycle, and development of the myxozoan Myxobolus rasmusseni n. sp. in fathead minnows, Pimephales promelas: A possible emerging pathogen in southern Alberta, Canada

Fig. 5. Phylogenetic tree produced by Bayesian analysis of aligned partial 18S rDNA gene sequences of M. rasmusseni n. sp. and other Myxobolus spp. infecting cyprinid fishes in Canada, Europe, and Asia. The tree is rooted with Ceratonova shasta (AF001579.1). Nodes are denoted with bootstrap probabilities generated by Bayesian analyses. Species in taxa in groups I-III are highlighted in the pairwise percent identity matrix in Supplementary Table 1.

Fig. 4 in Description, life cycle, and development of the myxozoan Myxobolus rasmusseni n. sp. in fathead minnows, Pimephales promelas: A possible emerging pathogen in southern Alberta, Canada

Fig. 4. Transmission electron micrographs of plasmodia that contain M. rasmusseni n. sp. myxospores. Sections are from lesioned tissue (see inset in A) located in the circumorbital cavity of a fathead minnow. A. Side-on view of a couplet of Myxobolus rasmusseni n. sp. myxospores at 2500X magnification. Sp - Sporoplasm, Iv - Iodinophilous vacuole, Pc - Polar capsule, Pf - Polar filament; Black arrowheads indicate nuclei, orange arrowheads indicate sutural ridge along the midline of myxospore; blue arrowheads indicate posterior projections on the myxospore. B. Myxospores sectioned in various orientations with adjacent rodlet cells at 2000X magnification. Rc - Rodlet cell, Ms: myxospore.

Fig. 1 in Description, life cycle, and development of the myxozoan Myxobolus rasmusseni n. sp. in fathead minnows, Pimephales promelas: A possible emerging pathogen in southern Alberta, Canada

Fig. 1. Disfiguring lesions on the heads of 1-yr old fathead minnows infected with Myxobolus rasmusseni n. sp. Minnows were live-trapped from University Pond, Lethbridge, Ab in summer, 2022, placed into a single aquarium in the laboratory, then photographed with a digital camera. A) Unilateral exopthalmia of the right eye. B) Bilateral exopthalmia with additional lesions on dorsal surface of circumorbital cavity and on surface of left nares. C) Asymmetric exopthalmia of the left dorsal circumorbital cavity; hemorrhage within left vitreous humour, D) Severe hemorrhage of the right eye. E) Pathology of the epidermis of the left posterior circumorbital cavity and surface of left operculum.