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A. The living animal, drawn from a micrograph.—B. Hard parts of the male copulatory system in the holotype. The asterix indicates the transparent lamella at the beginning of the straight terminal end.—C. Micrograph of the male copulatory organs in the holotype.—D. Terminal end of the penis stylet and of the accessory stylet in the holotype.— E. End part of the penis stylet in a paratype. —F-H. Hard parts in the female system in the holotype.— I-K. Hard parts in the female system in a paratype. (Scales = 20 µm).
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Photomicrographs of Myozonaria fissipara nov. sp. (Myozonariinae) (?C, MTP LS 651, paratype and hologenophore voucher; ?G, MTP LS 678, holotype and hologenophore voucher) (see Fig. 14 for taxonomic drawings). (A) The overall asexual habitus with two zooids in the process of fissioning at a clear fission plane (arrow head), both with clearly visible muscle rings (arrows) and pharynges. (B) Detail of the muscle ring of the anterior zooid showing circular muscle fibers. (C) Detail of the fission plane, clearly showing that the gut is still connected between the zooids (arrow). (D) The overall habitus of a sexual specimen with clearly visible muscle ring (arrow) and reproductive structures, including a mature oocyte (o), penis stylet (ps), accessory stylet (as), seminal vesicle (sv), and sperm tubes (st); note that the gut extends posteriorly (arrow head). (E) Bursal organ (bo) with attached sperm tube (st) filled with sperm (arrow). (F) Sperm cells released from the ruptured seminal vesicle; (G) accessory stylet (as) and penis stylet (ps). Note that panels ?G are from a highly squeezed preparation used to make the deposited permanent lactophenol preparation. Scale bars: 50 um, except A, D 100 um.
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Photomicrographs of Myozonariinae sp. (Myozonariinae) (A, MTP LS 673, hologenophore voucher; B-C, MTP LS 669, hologenophore voucher). (A) Sexual individual with clearly visible muscle ring (arrow) and approximate location of the caudal sensory organs (arrow heads); (B) detail of the muscle ring showing muscle fibers; (C) caudal sensory organs (arrow heads). Scale bars: 50 um.
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drawings from micrographs of live specimens. (A) Habitus and internal organization; (B) accessory and penis stylets; (C) bursal organ with sperm tube attached, sperm and vesicle; (D) bursal organ with sperm tube attached; (E) bursal organ, schematic reconstruction. A-D, from MTP LS 678; E, from various specimens. ag, accessory gland; as, accessory stylet; bo, bursal organ; br, brain; ct, ciliary tuft; e, eyes; fvs, false seminal vesicle; g, gut; ga, genital atrium; gp, gonopore; mip, mid-piece; mo, mouth opening; mop, mouth-piece; mr, muscle ring; o, oocytes; ov, ovary; ph, pharynx; ps, penis stylet; ra, rhammites; s, sperm; st, sperm tube; t, testis; vd, vas deferens; vg, vesicula granulorum; sv, seminal vesicle.
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drawings from micrographs of live specimens. (A) Habitus and internal organization; (B) accessory and penis stylets; (C) bursal organ showing attached distal end of sperm tube; (D, E) sperm tubes. B, E, from MTP LS 638; C, from MTP LS 640; D, from MTP LS 639; A, from various specimens. ag, accessory gland; as, accessory stylet; bo, bursal organ; br, brain; e, eyes; g, gut; ga, genital atrium; gp, gonopore; mip, mid-piece; mo, mouth opening; mop, mouth-piece; o, oocytes; ov, ovary; ph, pharynx; ps, penis stylet; ra, rhammites; s, sperm; st, sperm tube; t, testis; vd, vas deferens; vg, vesicula granulorum; sv, seminal vesicle.
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drawings from micrographs of live specimen MTP LS 689. (A) Habitus and internal organization; (B) sperm (nucleus in gray); (C) ps, penis stylet; br, brain; cso, caudal sensory organ; e, eyes; fp, formation of the fission plane; g, gut; mo, mouth opening; mr, muscle ring; ph, pharynx; ps, penis stylet; ra, rhammites; t, testis; vg, vesicula granulorum.
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