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Fig. 3 Cheliplana curini n. sp.: a Slightly-squeezed live animal. b Detail of the caudal half of a live animal with the genital system.
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A. General organisation (from a live specimen). B. Proboscis hook. C. Distal part of ejaculatory duct with cirrus and enveloping papilla.
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A, live animals under cover slip. B, C, stylets from two whole-mounted specimens. D, afferent system with bursal canal, bursa and bursal appendage in a whole-mounted specimen. Abbreviations: b, bursa; ba, bursal appendage; bc, bursal canal; e, eye; p, proboscis; ph, pharynx; st, stylet; t, testis. Scale bars: A = 200 µm; B–D = 50 µm.
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Fig.2 C. Frontal body part, ho1otype.-D. Male sclerotic structures, holotype. Fig.1D. Male sclerotic organs, holotype
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Trigonostomum vanmecheleni sp. nov. A, Internal organisation as seen on a live animal, dorsal view. ac: anterior cilia; ar: adenal rhabdites; ba: bursal appendage; bu: female bursa; e: eye; gp: gonopore; ov: ovary; p: proboscis; ph: pharynx; pv: prostate vesicle; st: stylet; t: testis; vit: vitellarium; vs: seminal vesicle. B, stylet and its parts: B1, entire stylet as seen on the holotype; B2, stylet proper; B3, the broad plate; B4, the narrow plate. C, bursal appendage from the holotype (1 and 2 at different focal planes). D, stylet as seen on a slightly squeezed live animal. E, bursal appendage as seen on a slightly-squeezed live animal.
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Drawing and micrograph of the cirrus
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habitus images of a few dalyellids. A. Microdalyellia armigera from Finnland, Lapvik. length 0.8-0.9 mm. B. Gieysztoria cuspidata, also from Finnland, Lapvik, length 0.8-0.9 mm. C. Fulinskiella bardeaui, from Italy, collected by F. Papi, length around 0.7 mm. D. Vaillantiella algerica, Algeria, drawing of F. Vaillant. E. Varsoviella kozminskii from Gieysztor & Wiszniewski, length 0.5-0.6 mm.
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(B) living specimen; (C) holotype, female genital organs; (D) holotype, prostatoid organ; (E) cephalic region of a juvenile specimen, whole mount (Akko); arrows point to the cerebral eyes. Scale bars: A, 50 μm; B, 10 mm; C, E, 100 μm; D, 25 μm.
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135. Organization (live specimens), 136. Spines of the copulatory organ (squeezed animal), 137. Bursal pieces (squeezed animal)
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Trigonostomum vanmecheleni sp. nov. A, Internal organisation as seen on a live animal, dorsal view. ac: anterior cilia; ar: adenal rhabdites; ba: bursal appendage; bu: female bursa; e: eye; gp: gonopore; ov: ovary; p: proboscis; ph: pharynx; pv: prostate vesicle; st: stylet; t: testis; vit: vitellarium; vs: seminal vesicle. B, stylet and its parts: B1, entire stylet as seen on the holotype; B2, stylet proper; B3, the broad plate; B4, the narrow plate. C, bursal appendage from the holotype (1 and 2 at different focal planes). D, stylet as seen on a slightly squeezed live animal. E, bursal appendage as seen on a slightly-squeezed live animal.
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a Habitus of a live animal. b Cirrus. c Proboscis.
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comparison of the male copulatory organs of four species in the Haplopharynx quadristimulus group. Haplopharynx quadristimulus, Haplopharynx cf. quadristimulus sp. A, Haplopharynx cf. quadristimulus sp. B, and Haplopharynx cf. quadristimulus sp. C. Scale bar refers to the first three species, and it is only approximate for H. cf. quadristimulus sp. C (*).