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Fig. 31 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 31. Chaetonotus (Hystricochaetonotus) iratus sp. nov. A. Dorsal overview showing the scale and spine pattern. B, D. Lateral and dorsal views of a head scale. C, F. Lateral and dorsal views of a trunk scale. E. Dorsolateral head scale. G. Ventrolateral trunk scale. H. Furca branches scale. I. Detail showing the mouth region. J. Internal morphology. The structure of the cerebral ganglion was observed only in a single specimen. Scale bar = 30 µm.

Fig. 1 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 1. Map of Europe showing the localization of Slovakia. Map tiles by ©Stamen Design, under a Creative Commons Attribution (CC BY 3.0) license. Data by OpenStreetMap, under ODbL.

Fig. 30 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 30. Chaetonotus (Hystricochaetonotus) luxus sp. nov., differential interference contrast. A, E. Paratype (CU-FNS-17-02-20/PA-1). B–D, F–G. Paratype (CU-FNS-17-02-20/PA-2). A. Lateral overview showing the internal morphology. B. Anterior body region. C. Head scales. D. Dorsolateral trunk scales. E. Lateral view of dorsal trunk spined scales carrying a minute lateral denticle (arrows). F. Ventral furcal scales. G. Dorsolateral oblong scales lining the furca sides. White stars in (A) and (B) mark the cerebral ganglion. Scale bars: A = 15 µm; B, E = 10 µm; C–D, F–G = 5 µm.

Fig. 19 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 19. Chaetonotus (Hystricochaetonotus) optabilis sp. nov. A. Ventral overview showing the scale and ciliary pattern. B. V-shaped scales without keels. C. Bowl-shaped scales without keels. D. Detail of the ventral posterior body region. E. Internal morphology. F. Narrowly obovate keeled scale. G. Fusiform keeled scale. H. Oblong spined scale. Scale bars: A, E = 30 µm; D = 10 µm.

Fig. 23 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 23. Chaetonotus (Hystricochaetonotus) avarus sp. nov. A. Dorsal overview showing the scale and spine pattern. B–C. Head scales. D. Neck dorsolateral scale. E. Lateral view of a trunk spined scale. F. Neck central scales. G. Trunk scales. H. Posterior trunk scales. I. Dorsal furca branches scales. J. Dorsal furca base scales. K. Internal morphology. L. Lateral overview. Scale bars = 30 µm.

Fig. 17 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 17. Chaetonotus (Hystricochaetonotus) superbus sp. nov., differential interference contrast. A–B. Paratype (CU-FNS-22-06-20/PA). C–G. Holotype (CU-FNS-15-06-20/HO). A. Detail showing the salivary gland, pharyngeal-intestinal junction, and differentiated anterior section of the intestine. B. Detail showing the connection of transversal bands to the base of scales. C. Detail showing the anterior portion of the digestive tract. D. Head scales. E. Neck scales. F. Spines. G. Trunk spined scales. Scale bars: A–B, D‒G = 5 µm; C = 10 µm.

Fig. 21 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 21. Chaetonotus (Hystricochaetonotus) optabilis sp. nov., differential interference contrast. A–B, D. Paratype (CU-FNS-05-03-20-3/PA-2). C. Holotype (CU-FNS-05-03-20-1/HO). A. Detail of the anterior body region. B. Ventral view of the head region. Asterisks mark the beginning of the ventral ciliary bands, arrows mark the cuticular structures of the hypostomium. C‒D. Details of the posterior body region, showing the ovaries and the organ X. Scale bars = 10 µm.

Fig. 27 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 27. Chaetonotus (Hystricochaetonotus) avarus sp. nov., paratype (CU-FNS-26-02-20/PA-2), differential interference contrast. A. Dorsal head scales. B. Overview showing the dorsal scale and spine pattern. C. Posterior trunk scales. D. Scales in the ventral interciliary field. E. Detail of the ventral posterior region. Scale bars: A, C–D = 5 µm; B = 30 µm; E = 15 µm.

Fig. 26 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 26. Chaetonotus (Hystricochaetonotus) avarus sp. nov., paratype (CU-FNS-26-02-20/PA-2), differential interference contrast. A. Anterior body region. B. Anteriorly merged ventral ciliary bands. C. Detail of the mouth region. Hypostomium bears a pentagonal cuticular plate with two central protuberances. Scale bars = 10 µm.

Fig. 16 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 16. Chaetonotus (Hystricochaetonotus) superbus sp. nov., differential interference contrast. A. Holotype (CU-FNS-15-06-20/HO), lateral overview showing the scale and spine pattern. B. Paratype (CU-FNS-22-06-20/PA), optical section showing the internal morphology in lateral view. Black stars in (A) mark the epipleurae and hypopleurae. White star in (B) marks the cerebral ganglion. Arrows mark the lateral denticle of spines. Scale bars = 30 µm.

Fig. 13 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 13. Chaetonotus (Hystricochaetonotus) mirabilis sp. nov., differential interference contrast. A, C, E, G. Paratype (CU-FNS-25-10-19/PA-1). B, D, F. Paratype (CU-FNS-02-10-19/PA-2). A. Internal morphology. Opposed arrowheads denote posterior pharyngeal dilatations. B. Lateral view of the anterior body region. White star marks the cerebral ganglion. C. Anterior pharyngeal dilatations (opposed arrowheads). D. A pair of cuticular teeth is situated in the center of the mouth ring. E. Ventral view of the head region. Asterisks mark the beginning of the ventral ciliary bands. F. The intestine contains highly refractive and regularly arranged structures (white double arrowheads). G. Furca with a U-shaped indentation and adhesive glands. Scale bars: A = 15 µm; B, E–G = 10 µm; C–D = 5 µm.

Fig. 25 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 25. Chaetonotus (Hystricochaetonotus) avarus sp. nov., paratype (CU-FNS-26-02-20/PA-2), differential interference contrast. A–B. Optical section showing the internal morphology. C. Ventral overview. Scale bars = 30 µm.

Fig. 36 in Gastrotricha - not only in sediments: new epiphytic species of Chaetonotida from the Jubilee Greenhouse of the Botanical Garden in Kraków

Fig. 36. Lepidodermella aff. squamata (Dujardin, 1841). Adult specimen. A. Habitus, phase contrast microphotograph. B–G. Bright field microphotographs. B. Head, dorsal view. C. Head, ventral view. D. Trunk, dorsal view. E. Trunk, ventral view. F. Posterior trunk region, furca base and furcal appendages, dorsal view. G. Posterior trunk region, furca base and furcal appendages, ventral view.

Fig. 35. Heterolepidoderma aff. majus Remane, 1927. Adult specimen. Bright field microphotographs. A. Habitus. B. Dorsal view. C in Gastrotricha - not only in sediments: new epiphytic species of Chaetonotida from the Jubilee Greenhouse of the Botanical Garden in Kraków

Fig. 35. Heterolepidoderma aff. majus Remane, 1927. Adult specimen. Bright field microphotographs. A. Habitus. B. Dorsal view. C. Ventral view.

Fig. 32 in Gastrotricha - not only in sediments: new epiphytic species of Chaetonotida from the Jubilee Greenhouse of the Botanical Garden in Kraków

Fig. 32. Chaetonotus (Hystricochaetonotus) inaequabilis sp. nov. Adult specimen. Bright field microphotographs. A. Detail of pharynx. B. X-organ and sperm pockets.

Fig. 23 in Gastrotricha - not only in sediments: new epiphytic species of Chaetonotida from the Jubilee Greenhouse of the Botanical Garden in Kraków

Fig. 23. Chaetonotus (Hystricochaetonotus) horridus sp. nov. Adult specimen. A. Spines lateral view, bright field microphotograph. B. Spines with lamellae, phase contrast microphotograph.

Fig. 22 in Gastrotricha - not only in sediments: new epiphytic species of Chaetonotida from the Jubilee Greenhouse of the Botanical Garden in Kraków

Fig. 22. Chaetonotus (Hystricochaetonotus) horridus sp. nov. Adult specimen. Bright field microphotographs. A. Posterior trunk, furca base and furcal appendage, scales lateral view. B. Posterior trunk, furca base and furcal appendage scales, dorsal view. C. Central and posterior trunk scales, dorsal view. D. Posterior trunk, furca base and furcal appendage scales, ventral view.

Fig. 21 in Gastrotricha - not only in sediments: new epiphytic species of Chaetonotida from the Jubilee Greenhouse of the Botanical Garden in Kraków

Fig. 21. Chaetonotus (Hystricochaetonotus) horridus sp. nov. Adult specimen. Bright field microphotographs. A. Trunk spines, dorsal view. B. Trunk spines, dorsolateral view. C–D. Trunk spines, lateral view.

Fig. 31 in Gastrotricha - not only in sediments: new epiphytic species of Chaetonotida from the Jubilee Greenhouse of the Botanical Garden in Kraków

Fig. 31. Chaetonotus (Hystricochaetonotus) inaequabilis sp. nov. Adult specimen. A. Head, neck, anterior and central trunk spines, dorsal view, bright field microphotograph. B. Head, neck, anterior and central trunk spines, ventral view, bright field microphotograph. C. Ventrolateral spines with lamellae, phase contrast microphotograph.

Fig. 19 in Gastrotricha - not only in sediments: new epiphytic species of Chaetonotida from the Jubilee Greenhouse of the Botanical Garden in Kraków

Fig. 19. Chaetonotus (Hystricochaetonotus) horridus sp. nov. Adult specimen. Bright field microphotographs. A. Dorsal body view. B. View of internal morphology. C. Ventral body view.