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Fig. 4 in Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)

Fig. 4. Goussia alosii from the intestine of landlocked alewives, bar = 10 μm. Wet mount of (A) highly elongated unsporulated oocysts and (B) sporulated oocysts with a thicker oocyst wall making up a very regular oval shape containing four highly elongated sporocysts. (C–E) Histology of coccidial stages in the intestine; (C) various stages of coccidia with an epicellular position within the intestinal epithelium; elongated unsporulated oocysts (arrows) found within the (D) intestinal epithelium and (E) within mucoid casts in the intestinal lumen.

Fig. 3 in Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)

Fig. 3. Goussia ameliae from landlocked alewives, bar = 10 μm. (A–C) Wet mounts of fresh coccidia preparations with (A) unsporulated oocysts and (B,C) sporulated oocysts containing four elongated sporocysts. (D–H) Histology documenting the development of the coccidian in the pyloric cecum, stained with H&E. (D) Meronts containing merozoites within the brush border on the surface of the intestinal epithelium; (E) early developmental stages (arrowheads) embedded within the brush border; (F) macrogamonts with an epicellular position on the intestinal epithelium; (G) microgametocytes (arrowhead) and unsporulated oocysts (arrow) which have sloughed from the epithelial surface; (H) severe coccidiosis with various developmental stages occupying most of the surface of the intestinal epithelium.

Fig. 2 in Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)

Fig. 2. Histology of coccidia infection in the intestine of anadromous alewives, stained with H&E, bar = 10 μm. (A,B) Spherical early developmental stages (arrowheads) within the brush border of the intestinal epithelium; (C) macrogamonts (arrowhead) (notice the notches nearly midway through the parasite, embedded within the surface of the intestinal epithelium); (D) macrogamonts with notches (arrowhead) and unsporulated elongated oocysts (arrows) within the intestinal epithelium.

Fig. 1 in Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)

Fig. 1. Goussia ameliae from anadromous alewives, bar = 10 μm. (A–C) Wet mounts of fresh coccidia preparations with (A) unsporulated oocysts, (B) oocysts in the process of sporulation, and (C) sporulated oocysts containing four sporocysts. (D–H) Histology documenting various stages of coccidia infection in the pyloric cecum, stained with H&E. (D) Intestinal epithelium with a severe infection of coccidia stages including gamonts and unsporulated oocysts covering the intestinal epithelium; (E) meront containing merozoites (arrow) attached to the microvillar surface of intestinal epithelial cells; (F) gamogony with macrogamonts (arrow) and microgametocytes (arrowhead) with an epicellular position; (G) unsporulated oocysts with an epicellular position (notice below, the focal necrosis to the intestinal epithelium); (H) a focal erosion in the intestinal epithelium with unsporulated and sporulated (arrow) oocysts released into the lumen.

Fig. 5 in Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)

Fig. 5. Line drawings of sporulated oocysts of Goussia ameliae from (A) anadromous and (B) landlocked alewives and (C) G. alosii sampled from landlocked alewives, bar = 5 μm.

Fig. 6 in Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)

Fig. 6. Phylogenetic tree based on maximum likelihood analysis (-ln = 5197.3909) based on 16 sequences obtained from Genbank and one sequence from this study (G. ameliae denoted with a bold circle). Goussia ameliae fit into a fish Goussia clade, which is distinct from other fish coccidians (*). Theilleria parva was used as an outgroup to root the tree.

Figure 3 in An ultrastructural study on the merogonic stages of Goussia senegalensis (Faye, 1988) Diouf and Toguebaye, 1993 (Apicomplexa, Coccidia) from the liver of Pagellus bellottii (Pisces, Teleostei)*

Figure 3. Meront showing the limiting membranes of merozoites (Lm). Er = endoplasmic reticulum, Hc = host cell cytoplasm, HcN = host cell nucleus, I = invagination, Mi = mitochondrion, and N = nucleus. Scale: 2.3 µm.

Figure 2. Advanced meront showing a in An ultrastructural study on the merogonic stages of Goussia senegalensis (Faye, 1988) Diouf and Toguebaye, 1993 (Apicomplexa, Coccidia) from the liver of Pagellus bellottii (Pisces, Teleostei)*

Figure 2. Advanced meront showing a nucleus (N). Db = dense body, Er = endoplasmic reticulum, and HcN = host cell nucleus. Scale: 2.6 µm.

Figure 6 in Newly Described Coccidia Goussia Bayae From White Perch Morone Americana: Morphology And Phylogenetics Support Emerging Taxonomy Of Goussia Within Piscine Hosts

Figure 6. Bayesian phylogenetic relationships of partitioned 18S rDNA and cytochrome oxidase 1 (COI). Posterior probability is indicated at branch sites. Toxoplasma gondii served as an outgroup. Accession numbers follow species names in parentheses (18S rDNA, COI).

Figure 5 in Newly Described Coccidia Goussia Bayae From White Perch Morone Americana: Morphology And Phylogenetics Support Emerging Taxonomy Of Goussia Within Piscine Hosts

Figure 5. Bayesian phylogenetic relationships of fish-infecting Goussia and Choleoeimeria spp. based on partial 18S rDNA. Selected sequences represent different morphology types (epicellular, leucisci, dispersed, and nodular) defined by Rosenthal et al. (2016). Hammondia hammondi was used as an outgroup. Posterior probability is indicated at branch sites. Accession numbers follow species names in parentheses.

Figure 4 in Newly Described Coccidia Goussia Bayae From White Perch Morone Americana: Morphology And Phylogenetics Support Emerging Taxonomy Of Goussia Within Piscine Hosts

Figure 4. Light micrographs of coccidia of Goussia bayae n. sp. in hepatic bile ducts of white perch, Morone americana. (A) Developing stages of coccidia epicellular to biliary epithelium. (B) Microgamont (Mi), macrogamont (Ma), and meront (Me) along epithelium. (C) Longitudinal view of bile duct with developing coccidia along epithelium (arrow) and sporulating oocysts (O) in lumen. (D). Cross-section of enlarged bile duct with numerous developing and mature coccidia.

Figure 7 in Newly Described Coccidia Goussia Bayae From White Perch Morone Americana: Morphology And Phylogenetics Support Emerging Taxonomy Of Goussia Within Piscine Hosts

Figure 7. Bayesian phylogenetic relationships of mitochondrial genes cytochrome oxidase 1 (COI) and cytochrome oxidase b (Cytb). Babesia microti was used as the outgroup. Accession numbers follow species names in parentheses.

Figure 1 in Newly Described Coccidia Goussia Bayae From White Perch Morone Americana: Morphology And Phylogenetics Support Emerging Taxonomy Of Goussia Within Piscine Hosts

Figure 1. Photomicrographs of oocysts of Goussia bayae n. sp. from the gallbladder of white perch, Morone americana. (A) Nomarski differential interference contrast image of mature oocysts with micropyle (m) and refractile bodies (arrow) in sporocysts. (B) Histological preparation of oocysts with sporocysts containing paired sporozoites with densely stained nuclei (arrow).

Figure 3 in Newly Described Coccidia Goussia Bayae From White Perch Morone Americana: Morphology And Phylogenetics Support Emerging Taxonomy Of Goussia Within Piscine Hosts

Figure 3. Light micrographs of coccidia of Goussia bayae n. sp. in the gallbladder of white perch, Morone americana. (A) Severe coccidiosis in gallbladder. Note that numerous oocysts were removed with the bile for differential interference contrast microscopy before histological processing. (B) Developing stages of coccidia along epithelium (arrow) and sporulating oocysts in the lumen. (C) Microgamont (Mi), macrogamont (Ma), and meront (Me) epicellular to biliary epithelium, with oocysts (O) in the lumen.

Figure 4 in An ultrastructural study on the merogonic stages of Goussia senegalensis (Faye, 1988) Diouf and Toguebaye, 1993 (Apicomplexa, Coccidia) from the liver of Pagellus bellottii (Pisces, Teleostei)*

Figure 4. Enclosure of merozoites (Mz) by endomerogony. The limiting membranes (Lm) elongate to surround each nucleus (N) and a part of the cytoplasm. Many invaginations (I) can be seen, some of them forming the pellicle (boxed area). HcN = host cell nucleus, and Pv = parasitophorous vacuole. Scale: 2 µm.

Figure 5 in An ultrastructural study on the merogonic stages of Goussia senegalensis (Faye, 1988) Diouf and Toguebaye, 1993 (Apicomplexa, Coccidia) from the liver of Pagellus bellottii (Pisces, Teleostei)*

Figure 5. Detail of formation of the pellicle (Pe) shown in the boxed area of Figure 4. A double membrane forms around the new merozoites (Mz). The inner membrane (Im) is from the limiting membrane (Lm) of the merozoite by invagination (I), and the outer membrane (Om) is from the inner membrane of the meront. N = nucleus, Pv = parasitophorous vacuole. Scale: 2 µm.

Figure 6 in An ultrastructural study on the merogonic stages of Goussia senegalensis (Faye, 1988) Diouf and Toguebaye, 1993 (Apicomplexa, Coccidia) from the liver of Pagellus bellottii (Pisces, Teleostei)*

Figure 6. Endodyogeny: meront dividing into 2 merozoites (Mz). The pellicle (Pe) begins forming by invagination (I). Cr = cytoplasm residuum, HcN = host cell nucleus, Mi = mitochondrion, N = nucleus. Scale: 2.8 µm.

Figure 2. Goussia bayae n in Newly Described Coccidia Goussia Bayae From White Perch Morone Americana: Morphology And Phylogenetics Support Emerging Taxonomy Of Goussia Within Piscine Hosts

Figure 2. Goussia bayae n. sp. Line drawing of a sporulated oocyst.