FIGURE 9. Elpidium heberti n. sp., A, B, male, C, female. A—antennula (MZUSP 37392); B—antenna (M... more FIGURE 9. Elpidium heberti n. sp., A, B, male, C, female. A—antennula (MZUSP 37392); B—antenna (MZUSP 37392); C—antenna (MZUSP 37387). Scale bars: A–C—0.05 mm. Ya=aesthetasc on terminal segment of antennula. Y=aesthetasc on second endopodial segment of antenna. hy=hyaline formation on terminal segment of antenna.
<i>Xenotrichula intermedia</i> Remane, 1934 (figure 6A) Remane, 1934: 477–478. Adult ... more <i>Xenotrichula intermedia</i> Remane, 1934 (figure 6A) Remane, 1934: 477–478. Adult specimens with total body length up to 180 <i>µ</i> m (range 160–180, <i>N</i> ~8); PhIJ at U24.8; pharynx length up to 41 <i>µ</i> m; furca length up to 25 <i>µ</i> m with adhesive tube up to 11.5 <i>µ</i> m. Widths of head, neck, trunk and furcal base as follows: 30, 25, 40, 18.7 <i>µ</i> m. Sixteen to 20 dorsal and lateral columns of <i>intermedia</i> - type stalked scales, seven columns on each side of the ventral midline; a triangular field of flat scales posterior to the anus; five scales on the inner margin of the furca; cephalion not seen, hypostomion present. Anterior, ventral cirri of virtually equal size, mostly in columns of three to four each per side of the midline of the body; posterior tufts with three to five cirri; three pairs of sensory cirri; very small head palps present; three to four pairs of oral cilia; at least three pairs of elongate sensory cilia. Furca simple type. Anus ventral at U84.5. Adhesive glands near posterior end of the intestine. Protandric then simultaneous hermaphrodite; male copulatory organ unpaired, posteriorly directed, located near the tufts of cirri of the trunk. <i>Remarks</i> Metric characteristics of the Brazilian specimen fall within the lower end of the range known for the species. <i>Ecology</i> Frequency of occurrence: occasional in sediment of the northern sites, usual in southern sites but apparently absent in locations of the São Sebastião Channel and on Ilhabela. Abundance: prevalent to numerous in sub-littoral, fine sediment of the southern locations, scarce elsewhere. <i>Distribution</i> Brazil: Ubatuba: praia Prumirim (<b>l</b>, <b>sl</b>), praia Vermelha (<b>l</b>); São Sebastião: praia de Santiago (<b>sl</b>), praia do Saı´, praia Preta e Conchas. World: cosmopolitan.
FIGURE 30. Paratomella rubra; photomicrographs of living specimen. A. Dorsal view squeezed specim... more FIGURE 30. Paratomella rubra; photomicrographs of living specimen. A. Dorsal view squeezed specimen. B. Dorsal view of anterior. C. Copulatory organs.
FIGURE 29. Philocelis robrochai sp. nov.; whole-mounts stained with Alexa- 488 - labeled phalloid... more FIGURE 29. Philocelis robrochai sp. nov.; whole-mounts stained with Alexa- 488 - labeled phalloidin and viewed with confocal microscopy. A. Ventral projection of posterior end of animal. B. Projection of male copulatory organ.
FIGURE 28. Philocelis robrochai sp. nov.; reconstructions to show arrangement of organs. A. Sagit... more FIGURE 28. Philocelis robrochai sp. nov.; reconstructions to show arrangement of organs. A. Sagittal reconstruction showing arrangement of female copulatory organ. B. Sagittal reconstruction showing arrangement of male copulatory organ.
FIGURE 27. Philocelis robrochai sp. nov.; photomicrographs of living specimens. A. Dorsal view of... more FIGURE 27. Philocelis robrochai sp. nov.; photomicrographs of living specimens. A. Dorsal view of unsqueezed specimen. B. Dorsal view of squeezed specimen. C. Rhabdoid glands within epidermis. D. Dorsal view of copulatory organs.
FIGURE 26. Otocelis erinae sp. nov.; whole-mounts stained with Alexa- 488 - labeled phalloidin an... more FIGURE 26. Otocelis erinae sp. nov.; whole-mounts stained with Alexa- 488 - labeled phalloidin and viewed with confocal microscopy. A. Projection of whole specimen from ventral side. B. Dorsal projection through copulatory organs. C. Projection of everted male copulatory organ.
FIGURE 17. Isodiametra vexillaria; photomicrographs of living specimen. A. Dorsal view of squeeze... more FIGURE 17. Isodiametra vexillaria; photomicrographs of living specimen. A. Dorsal view of squeezed specimen. B. Dorsal view of copulatory organs.
FIGURE 15. Avagina marci; photomicrographs of a living specimen. A. Dorsal view of squeezed speci... more FIGURE 15. Avagina marci; photomicrographs of a living specimen. A. Dorsal view of squeezed specimen. B. Dorsal view of male copulatory organ.
FIGURE 13. Archaphanostoma marcusi sp. nov.; photomicrographs of a living specimen. A. Dorsal vie... more FIGURE 13. Archaphanostoma marcusi sp. nov.; photomicrographs of a living specimen. A. Dorsal view of squeezed specimen. B. Dorsal view of copulatory organs.
FIGURE 11. Kuma asilhas sp. nov.; photomicrographs of living specimen. A. Dorsal view of elongate... more FIGURE 11. Kuma asilhas sp. nov.; photomicrographs of living specimen. A. Dorsal view of elongated and squeezed living specimen. B. Dorsal view of squeezed living specimen. C. Dorsal view of male copulatory organ.
FIGURE 10. Kuma albiventer; photomicrographs. A. Dorsal view of squeezed living specimen. B. Obli... more FIGURE 10. Kuma albiventer; photomicrographs. A. Dorsal view of squeezed living specimen. B. Oblique histological sections of whole specimen stained with toluidine blue. C, D. Histological sections through male copulatory organ. Arrows point to granular gland cells.
FIGURE 9. Elpidium heberti n. sp., A, B, male, C, female. A—antennula (MZUSP 37392); B—antenna (M... more FIGURE 9. Elpidium heberti n. sp., A, B, male, C, female. A—antennula (MZUSP 37392); B—antenna (MZUSP 37392); C—antenna (MZUSP 37387). Scale bars: A–C—0.05 mm. Ya=aesthetasc on terminal segment of antennula. Y=aesthetasc on second endopodial segment of antenna. hy=hyaline formation on terminal segment of antenna.
<i>Xenotrichula intermedia</i> Remane, 1934 (figure 6A) Remane, 1934: 477–478. Adult ... more <i>Xenotrichula intermedia</i> Remane, 1934 (figure 6A) Remane, 1934: 477–478. Adult specimens with total body length up to 180 <i>µ</i> m (range 160–180, <i>N</i> ~8); PhIJ at U24.8; pharynx length up to 41 <i>µ</i> m; furca length up to 25 <i>µ</i> m with adhesive tube up to 11.5 <i>µ</i> m. Widths of head, neck, trunk and furcal base as follows: 30, 25, 40, 18.7 <i>µ</i> m. Sixteen to 20 dorsal and lateral columns of <i>intermedia</i> - type stalked scales, seven columns on each side of the ventral midline; a triangular field of flat scales posterior to the anus; five scales on the inner margin of the furca; cephalion not seen, hypostomion present. Anterior, ventral cirri of virtually equal size, mostly in columns of three to four each per side of the midline of the body; posterior tufts with three to five cirri; three pairs of sensory cirri; very small head palps present; three to four pairs of oral cilia; at least three pairs of elongate sensory cilia. Furca simple type. Anus ventral at U84.5. Adhesive glands near posterior end of the intestine. Protandric then simultaneous hermaphrodite; male copulatory organ unpaired, posteriorly directed, located near the tufts of cirri of the trunk. <i>Remarks</i> Metric characteristics of the Brazilian specimen fall within the lower end of the range known for the species. <i>Ecology</i> Frequency of occurrence: occasional in sediment of the northern sites, usual in southern sites but apparently absent in locations of the São Sebastião Channel and on Ilhabela. Abundance: prevalent to numerous in sub-littoral, fine sediment of the southern locations, scarce elsewhere. <i>Distribution</i> Brazil: Ubatuba: praia Prumirim (<b>l</b>, <b>sl</b>), praia Vermelha (<b>l</b>); São Sebastião: praia de Santiago (<b>sl</b>), praia do Saı´, praia Preta e Conchas. World: cosmopolitan.
FIGURE 30. Paratomella rubra; photomicrographs of living specimen. A. Dorsal view squeezed specim... more FIGURE 30. Paratomella rubra; photomicrographs of living specimen. A. Dorsal view squeezed specimen. B. Dorsal view of anterior. C. Copulatory organs.
FIGURE 29. Philocelis robrochai sp. nov.; whole-mounts stained with Alexa- 488 - labeled phalloid... more FIGURE 29. Philocelis robrochai sp. nov.; whole-mounts stained with Alexa- 488 - labeled phalloidin and viewed with confocal microscopy. A. Ventral projection of posterior end of animal. B. Projection of male copulatory organ.
FIGURE 28. Philocelis robrochai sp. nov.; reconstructions to show arrangement of organs. A. Sagit... more FIGURE 28. Philocelis robrochai sp. nov.; reconstructions to show arrangement of organs. A. Sagittal reconstruction showing arrangement of female copulatory organ. B. Sagittal reconstruction showing arrangement of male copulatory organ.
FIGURE 27. Philocelis robrochai sp. nov.; photomicrographs of living specimens. A. Dorsal view of... more FIGURE 27. Philocelis robrochai sp. nov.; photomicrographs of living specimens. A. Dorsal view of unsqueezed specimen. B. Dorsal view of squeezed specimen. C. Rhabdoid glands within epidermis. D. Dorsal view of copulatory organs.
FIGURE 26. Otocelis erinae sp. nov.; whole-mounts stained with Alexa- 488 - labeled phalloidin an... more FIGURE 26. Otocelis erinae sp. nov.; whole-mounts stained with Alexa- 488 - labeled phalloidin and viewed with confocal microscopy. A. Projection of whole specimen from ventral side. B. Dorsal projection through copulatory organs. C. Projection of everted male copulatory organ.
FIGURE 17. Isodiametra vexillaria; photomicrographs of living specimen. A. Dorsal view of squeeze... more FIGURE 17. Isodiametra vexillaria; photomicrographs of living specimen. A. Dorsal view of squeezed specimen. B. Dorsal view of copulatory organs.
FIGURE 15. Avagina marci; photomicrographs of a living specimen. A. Dorsal view of squeezed speci... more FIGURE 15. Avagina marci; photomicrographs of a living specimen. A. Dorsal view of squeezed specimen. B. Dorsal view of male copulatory organ.
FIGURE 13. Archaphanostoma marcusi sp. nov.; photomicrographs of a living specimen. A. Dorsal vie... more FIGURE 13. Archaphanostoma marcusi sp. nov.; photomicrographs of a living specimen. A. Dorsal view of squeezed specimen. B. Dorsal view of copulatory organs.
FIGURE 11. Kuma asilhas sp. nov.; photomicrographs of living specimen. A. Dorsal view of elongate... more FIGURE 11. Kuma asilhas sp. nov.; photomicrographs of living specimen. A. Dorsal view of elongated and squeezed living specimen. B. Dorsal view of squeezed living specimen. C. Dorsal view of male copulatory organ.
FIGURE 10. Kuma albiventer; photomicrographs. A. Dorsal view of squeezed living specimen. B. Obli... more FIGURE 10. Kuma albiventer; photomicrographs. A. Dorsal view of squeezed living specimen. B. Oblique histological sections of whole specimen stained with toluidine blue. C, D. Histological sections through male copulatory organ. Arrows point to granular gland cells.
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