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221 results for “Acoela”
FIGURE 8 in New species of Acoela (Acoelomorpha) from the Gulf of California
FIGURE 8. Praeaphanostoma gusana sp. nov.; photomicrographs. A. Dorsal view of living specimen. B. Dorsal view of posterior. C. Sagittal histological section of copulatory organs. gp, gonopore; gr, granules; p, penis; sb, seminal bursa; sv, seminal vesicle.
FIGURE 1 in Waminoa brickneri n. sp. (Acoela: Acoelomorpha) associated with corals in the Red Sea
FIGURE 1. Waminoa brickneri sp. nov. A. Live animals infesting the coral Plesiastrea laxa. B. Ventral view of fixed adult specimen. C. Anterior end of live freshly hatched juvenile. e, eyespots; st, statocyst.
FIGURE 3 in New species of Acoela (Acoelomorpha) from the Gulf of California
FIGURE 3. Haplogonaria amarilla sp. nov.; wholemount stained with Alexa488labeled phalloidin and viewed with confocal microscopy. A. Projection of ventral bodywall musculature. For explanation of muscle patterns see Hooge (2001). B. Focus on parenchymal musculature. Arrowheads mark ventral diagonal bodywall muscles. gp, common gonopore; m, mouth; sv, seminal vesicle.
FIGURE 2 in Waminoa brickneri n. sp. (Acoela: Acoelomorpha) associated with corals in the Red Sea
FIGURE 2: Waminoa brickneri sp. nov. Reconstructions showing arrangement of organs. A. Dorsal reconstruction of whole organism. B. Sagittal reconstruction of whole organism. C. Sagittal reconstruction of reproductive organs. bn, bursal nozzle; br, brain; cm, cell mass; cop, male copulatory apparatus; e, egg; fsv, false seminal vesicle; fgp, female gonopore; m, mouth; mg, mucous gland; pg, penis glands; rh, rhabdoid gland cell; sb, seminal bursa; sv, seminal vesicle; t, testes; zx, zooxanthellae.
FIGURE 2 in New species of Acoela (Acoelomorpha) from the Gulf of California
FIGURE 2. Haplogonaria amarilla sp. nov.; photomicrographs of living specimen. A. Dorsal view of whole specimen. B. View of anterior tip. C. View of posterior tip. e, egg; fg, frontal gland; rh, rhabdoid gland; sb, seminal bursa; st, statocyst; sv, seminal vesicle; t, testes.
FIGURE 6 in New species of Acoela (Acoelomorpha) from the Gulf of California
FIGURE 6. Isodiametra bajaensis sp. nov.; wholemount stained with Alexa488labeled phalloidin and viewed with confocal microscopy. A. Projection of musculature associated with reproductive organs including vaginal sphincter. B. Projection showing penis musculature inside seminal vesicle. bn, bursal nozzle; p, penis; sph, vaginal sphincter; sv, seminal vesicle.
FIGURE 5 in New species of Acoela (Acoelomorpha) from the Gulf of California
FIGURE 5. Isodiametra bajaensis sp. nov.; photomicrographs. A. Dorsal view of living specimen. B. Dorsal view of posterior. C. Sagittal histological section of posterior. bn, bursal nozzle; e, egg; gp, gonopore; gr, granules; gs, glandular secretions; p, penis; sb, seminal bursa; sp, sperm; sph, vaginal sphincter; sv, seminal vesicle.
FIGURE 9 in Acoela (Acoelomorpha) from Belize
FIGURE 9. Antrosagittifera corallina; photomicrographs of living specimen. A. Dorsal view of lightly squeezed specimen. B. Bursal nozzle. C. Sagittocysts at posterior end of animal.
FIGURE 8 in Acoela (Acoelomorpha) from Belize
FIGURE 8. Proporus carolinensis; photomicrographs of sagittal histological sections. A. Whole specimen. B. Male copulatory organ. Arrowheads point to metachromatic red filamentous strands surrounding sperm of seminal vesicle.
FIGURE 5 in Acoela (Acoelomorpha) from Belize
FIGURE 5. Pseudohaplogonaria rodmani sp. nov.; A. Dorsal view of living specimen. B. Sagittal histological section of whole specimen. C. Sagittal histological section through seminal bursa and bursal nozzle. D. Sagittal histological section through male gonopore.
FIGURE 6 in Acoela (Acoelomorpha) from Belize
FIGURE 6. Photomicrographs of living acoel specimens. A. Hofstenia miamia collected from decaying mangrove leaves. B. Hofstenia miamia collected from a bed of Thalassia sp. C. Avagina cf. marci.
FIGURE 3 in Acoela (Acoelomorpha) from Belize
FIGURE 3. Parahaploposthia longituba sp. nov.; Sagittal histological sections of holotype. A. Whole animal. B. Posterior end of animal, showing copulatory organs. Epidermal fold is an artifact of fixation and does not lead to a pore in body wall. C. Anterior end of animal. D. Portion of ciliated male antrum, showing gland cells (arrowheads) within antrum epithelium.
FIGURE 7 in Acoela (Acoelomorpha) from Belize
FIGURE 7. Proporus carolinensis; photomicrographs of living specimens. A. Dorsal view of unsqueezed specimen. B. Lateral view of squeezed specimen. C. Lateral view of anterior end, showing the pharynx. D. Lateral view of posterior end, showing male copulatory organ.
FIGURE 4 in Acoela (Acoelomorpha) from Belize
FIGURE 4. Parahaploposthia longituba sp. nov.; whole-mounts stained with Alexa-488-labeled phalloidin and viewed with confocal microscopy. A. Projection of ventral body-wall musculature. Arrowheads point to diagonally-directed parenchymal muscles located beneath the body-wall musculature. B. Projection of male antrum.
FIGURE 1 in Acoela (Acoelomorpha) from Belize
FIGURE 1. Photomicrographs of living acoel specimens. A. Haploposthia vandula. B. Kuma albiventer. C. Male copulatory organ of Kuma albiventer.
FIGURE 2 in Acoela (Acoelomorpha) from Belize
FIGURE 2. Parahaploposthia longituba sp. nov.; photomicrographs of living specimens. A. Whole specimen. B. Male and female copulatory organs.
FIGURE 10 in Acoela (Acoelomorpha) from Bocas del Toro, Panama
FIGURE 10. Photomicrographs of living specimens. A. Kuma albiventer. B. Hofstenia miamia.
FIGURE 7 in Acoela (Acoelomorpha) from Bocas del Toro, Panama
FIGURE 7. Exocelis reedi sp. nov.; photomicrographs of a living specimen.
FIGURE 2 in Acoela (Acoelomorpha) from Bocas del Toro, Panama
FIGURE 2. Photomicrographs of living specimens. A. Convoluta sp. B. cf. Heterochaerus sargassi.
Fig. 7 in The Acoela: on their kind and kinships, especially with nemertodermatids and xenoturbellids (Bilateria incertae sedis)
Fig. 7 Cladogram of the Acoelomorpha with partial family-level systematics of the Acoela. 1. Multiciliated epidermis, ciliary rootlet system, frontal organ, basiepidermal nervous system with ring-shaped brain. 2. Statocyst with two lithocytes (statoliths) and many parietal cells, sperm with cork screw-like morphology. 3. Statocyst with one lithocyte (statolith) and two parietal cells, brain sunk below body wall, lateral fibers at knee of rostral rootlet, biflagellated sperm; digestive system becomes depolarized. 4. Position of mouth at the posterior end. 5. Specialized parenchymal tissue for reception, storage, and digestion of sperm (seminal bursa). 6. Subterminal pharynx at anterior end. 7.
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