Mixibius schnurae Pilato & Lisi & Binda 2010, sp. nov.

Mixibius schnurae sp. nov. (Figs. 10, 11) Material examined. Locality No. 1 (Mt. Hermon: Makam Ibraim el Khalil): holotype (slide No. 5420) and 12 paratypes (Nos. 5419-20). Type repository. Holotype and paratypes are deposited in the collection of Binda & Pilato, Museum of the Department of Anim...

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Main Authors: Pilato, Giovanni, Lisi, Oscar, Binda, Maria Grazia
Format: Text
Language:unknown
Published: Zenodo 2010
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Online Access:https://dx.doi.org/10.5281/zenodo.5309334
https://zenodo.org/record/5309334
id ftdatacite:10.5281/zenodo.5309334
record_format openpolar
institution Open Polar
collection DataCite Metadata Store (German National Library of Science and Technology)
op_collection_id ftdatacite
language unknown
topic Biodiversity
Taxonomy
Animalia
Tardigrada
Eutardigrada
Parachela
Hypsibiidae
Mixibius
Mixibius schnurae
spellingShingle Biodiversity
Taxonomy
Animalia
Tardigrada
Eutardigrada
Parachela
Hypsibiidae
Mixibius
Mixibius schnurae
Pilato, Giovanni
Lisi, Oscar
Binda, Maria Grazia
Mixibius schnurae Pilato & Lisi & Binda 2010, sp. nov.
topic_facet Biodiversity
Taxonomy
Animalia
Tardigrada
Eutardigrada
Parachela
Hypsibiidae
Mixibius
Mixibius schnurae
description Mixibius schnurae sp. nov. (Figs. 10, 11) Material examined. Locality No. 1 (Mt. Hermon: Makam Ibraim el Khalil): holotype (slide No. 5420) and 12 paratypes (Nos. 5419-20). Type repository. Holotype and paratypes are deposited in the collection of Binda & Pilato, Museum of the Department of Animal Biology “Marcello La Greca”, University of Catania. Specific diagnosis. Dorsal cuticle rugose: transverse bands with faint, irregular reticular mesh design more elongate in some bands, less elongate in others. The ridges are more or less thick and also form small tubercles more visible in the posterior part of the body. Stylet supports inserted on the buccal tube at c . 62–64 % of its length. Pharyngeal bulb with apophyses and two macroplacoids; microplacoid absent. Main branches of the claws with accessory points; small smooth lunules present; no other cuticular thickening present on the legs. Description of the holotype. Body length 230 µm; colourless; eye spots not visible (however, the specimens sent by Chanan Dimentman were fixed in ethanol 70% and we were unable to examine living specimens). Body surface is rough (Fig. 10 A–C) and we noted two forms of transverse bands, one where ridges form an irregular reticular design with transversely elongate meshes (Fig. 10A), and the other where thin ridges form an irregular reticular design with almost isodiametric meshes (Fig. 10C, arrows). The ridges are more or less thick and also form small tubercles (Fig. 10A) more visible in the posterior part of the body (Fig. 10B, arrow). The ventral surface showed an almost invisible granulation. The mouth, antero-ventral, has no peribuccal lamellae or papulae; other structures are not visible. Buccal tube 26.6 µm long, and when examined on the dorsal or ventral view, appeared slightly narrower in the anterior portion and wider in the caudal one (Fig. 11A); it is 2.7 µm wide at the anterior extremity ( pt = 10.2) and 3.3 µm ( pt = 12.4) in the caudal portion. Apophyses for the insertion of the stylet muscles, as in the other species of this genus, "hook" shaped, but slightly asymmetrical with respect to the frontal plane; both apophyses with two caudal processes pointing backwards and sideways (Fig. 11A). Stylet supports inserted at 62.8 % of the buccal tube length ( pt = 62.8). Pharyngeal bulb with apophyses and two macroplacoids; microplacoid absent (Fig. 11A); entire placoid row 9.4 µm long ( pt = 35.3), first macroplacoid, with a central narrowing, 5.1 µm long ( pt = 19.2); second macroplacoid 3.1 µm long ( pt = 11.7). Claws of ‘ Mixibius type’ and well developed; the basal portion of the internal claws very short (Fig. 11B, C, D). Internal and external claws of the second pair of legs 12.0 µm ( pt = 45.1) and 14.7 µm long ( pt = 55.3), respectively; the orientation of the claws of the fourth pair of legs did not allow their measurement; in a paratype of the same body length (Table 5) the anterior and posterior claws were 13.1 µm ( pt = 46.8) and 17.0 µm ( pt = 60.7), respectively. Main claw branches with accessory points (Fig.11C); small, smooth lunules were present (Fig. 11D). No other cuticular thickening present on the legs. Eggs not found. The paratypes are similar to the holotype in both qualitative and metric characters. Measurements of structures of the holotype and of the smallest and largest specimens are indicated in Table 8. * Measurements of M. ninguidus according to Biserov, 1999. Etymology. The name is in honour of our colleague Heather Schnur (Jerusalem). Differential diagnosis. Until now only seven species are known of the genus Mixibius four have ornamented cuticle: M. tibetanus Li & Li, 2008, M. ornatus , M. sutirae and M. ninguidus Biserov, 1999. The new species differs from M. tibetanus in the characters of the cuticular ornamentation, in having only two macroplacoids, in lacking both the microplacoid, and cuticular bar on the legs I–III. The new species differs from M. ornatus in having different cuticular ornamentation (Figs 10A,C and 12A). In M. schnurae sp. nov . the stylet supports are inserted on the buccal tube in a more cephalic position ( pt values from 62.4 to 64.3 in M. schnurae sp. nov ., from 69.1 to 70.5 in M. ornatus, ), the buccal tube is slightly wider, and placoids and claws are slightly longer (Table 8). Mixibius schnurae sp. nov . differs from M. sutirae in having a different cuticular ornamentation (Figs 10A, C and 12D), in having the stylet supports inserted on the buccal tube in a more cephalic position ( pt values from 62.4 to 64.3 in M. schnurae sp. nov ., from 70.5 to 70.8 in M. sutirae ) and slightly longer placoids (Table 8). The new species differs from M. ninguidus in having a different cuticular ornamentation, longer buccal tube and shorter second placoid (Table 8). One may hypothesize that before the genus Mixibius was created and described, some species belonging to this genus had been attributed to Isohypsibius . For this reason we compared Mixibius schnurae sp. nov . with species of Isohypsibius possessing ornamented cuticles. We noted that in some characters the new species is similar to Isohypsibius gilvus. However, we noted difference in the cuticular ornamentation and, in addition, the new species has wider buccal tube, shorter second macroplacoid (though the values of the pt index are not that different due to the I. gilvus buccal tube being slightly shorter with respect to the body size), and small lunules are present. : Published as part of Pilato, Giovanni, Lisi, Oscar & Binda, Maria Grazia, 2010, Tardigrades of Israel with description of four new species, pp. 1-28 in Zootaxa 2665 on pages 21-24 : {"references": ["Biserov, V. (1999) A review of the Tardigrada from Novaya Zemlya, with descriptions of three new species, and an evaluation of the environment of this region. Zoologischer Anzeiger, 238, 199 - 182.", "Li, H. & Li, X. (2008) Two new species of Hypsibiidae (Tardigrada: Eutardigrada) from China. Proceeding of the Biological Society of Washington, 121, 41 - 48."]}
format Text
author Pilato, Giovanni
Lisi, Oscar
Binda, Maria Grazia
author_facet Pilato, Giovanni
Lisi, Oscar
Binda, Maria Grazia
author_sort Pilato, Giovanni
title Mixibius schnurae Pilato & Lisi & Binda 2010, sp. nov.
title_short Mixibius schnurae Pilato & Lisi & Binda 2010, sp. nov.
title_full Mixibius schnurae Pilato & Lisi & Binda 2010, sp. nov.
title_fullStr Mixibius schnurae Pilato & Lisi & Binda 2010, sp. nov.
title_full_unstemmed Mixibius schnurae Pilato & Lisi & Binda 2010, sp. nov.
title_sort mixibius schnurae pilato & lisi & binda 2010, sp. nov.
publisher Zenodo
publishDate 2010
url https://dx.doi.org/10.5281/zenodo.5309334
https://zenodo.org/record/5309334
genre Novaya Zemlya
genre_facet Novaya Zemlya
op_relation http://publication.plazi.org/id/7424E07BFFFE907FFFE98502FF9AFC6F
https://zenodo.org/communities/biosyslit
http://publication.plazi.org/id/7424E07BFFFE907FFFE98502FF9AFC6F
https://dx.doi.org/10.5281/zenodo.5309335
https://zenodo.org/communities/biosyslit
op_rights Open Access
info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.5281/zenodo.5309334
https://doi.org/10.5281/zenodo.5309335
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spelling ftdatacite:10.5281/zenodo.5309334 2023-05-15T17:47:15+02:00 Mixibius schnurae Pilato & Lisi & Binda 2010, sp. nov. Pilato, Giovanni Lisi, Oscar Binda, Maria Grazia 2010 https://dx.doi.org/10.5281/zenodo.5309334 https://zenodo.org/record/5309334 unknown Zenodo http://publication.plazi.org/id/7424E07BFFFE907FFFE98502FF9AFC6F https://zenodo.org/communities/biosyslit http://publication.plazi.org/id/7424E07BFFFE907FFFE98502FF9AFC6F https://dx.doi.org/10.5281/zenodo.5309335 https://zenodo.org/communities/biosyslit Open Access info:eu-repo/semantics/openAccess Biodiversity Taxonomy Animalia Tardigrada Eutardigrada Parachela Hypsibiidae Mixibius Mixibius schnurae Text Taxonomic treatment article-journal ScholarlyArticle 2010 ftdatacite https://doi.org/10.5281/zenodo.5309334 https://doi.org/10.5281/zenodo.5309335 2021-11-05T12:55:41Z Mixibius schnurae sp. nov. (Figs. 10, 11) Material examined. Locality No. 1 (Mt. Hermon: Makam Ibraim el Khalil): holotype (slide No. 5420) and 12 paratypes (Nos. 5419-20). Type repository. Holotype and paratypes are deposited in the collection of Binda & Pilato, Museum of the Department of Animal Biology “Marcello La Greca”, University of Catania. Specific diagnosis. Dorsal cuticle rugose: transverse bands with faint, irregular reticular mesh design more elongate in some bands, less elongate in others. The ridges are more or less thick and also form small tubercles more visible in the posterior part of the body. Stylet supports inserted on the buccal tube at c . 62–64 % of its length. Pharyngeal bulb with apophyses and two macroplacoids; microplacoid absent. Main branches of the claws with accessory points; small smooth lunules present; no other cuticular thickening present on the legs. Description of the holotype. Body length 230 µm; colourless; eye spots not visible (however, the specimens sent by Chanan Dimentman were fixed in ethanol 70% and we were unable to examine living specimens). Body surface is rough (Fig. 10 A–C) and we noted two forms of transverse bands, one where ridges form an irregular reticular design with transversely elongate meshes (Fig. 10A), and the other where thin ridges form an irregular reticular design with almost isodiametric meshes (Fig. 10C, arrows). The ridges are more or less thick and also form small tubercles (Fig. 10A) more visible in the posterior part of the body (Fig. 10B, arrow). The ventral surface showed an almost invisible granulation. The mouth, antero-ventral, has no peribuccal lamellae or papulae; other structures are not visible. Buccal tube 26.6 µm long, and when examined on the dorsal or ventral view, appeared slightly narrower in the anterior portion and wider in the caudal one (Fig. 11A); it is 2.7 µm wide at the anterior extremity ( pt = 10.2) and 3.3 µm ( pt = 12.4) in the caudal portion. Apophyses for the insertion of the stylet muscles, as in the other species of this genus, "hook" shaped, but slightly asymmetrical with respect to the frontal plane; both apophyses with two caudal processes pointing backwards and sideways (Fig. 11A). Stylet supports inserted at 62.8 % of the buccal tube length ( pt = 62.8). Pharyngeal bulb with apophyses and two macroplacoids; microplacoid absent (Fig. 11A); entire placoid row 9.4 µm long ( pt = 35.3), first macroplacoid, with a central narrowing, 5.1 µm long ( pt = 19.2); second macroplacoid 3.1 µm long ( pt = 11.7). Claws of ‘ Mixibius type’ and well developed; the basal portion of the internal claws very short (Fig. 11B, C, D). Internal and external claws of the second pair of legs 12.0 µm ( pt = 45.1) and 14.7 µm long ( pt = 55.3), respectively; the orientation of the claws of the fourth pair of legs did not allow their measurement; in a paratype of the same body length (Table 5) the anterior and posterior claws were 13.1 µm ( pt = 46.8) and 17.0 µm ( pt = 60.7), respectively. Main claw branches with accessory points (Fig.11C); small, smooth lunules were present (Fig. 11D). No other cuticular thickening present on the legs. Eggs not found. The paratypes are similar to the holotype in both qualitative and metric characters. Measurements of structures of the holotype and of the smallest and largest specimens are indicated in Table 8. * Measurements of M. ninguidus according to Biserov, 1999. Etymology. The name is in honour of our colleague Heather Schnur (Jerusalem). Differential diagnosis. Until now only seven species are known of the genus Mixibius four have ornamented cuticle: M. tibetanus Li & Li, 2008, M. ornatus , M. sutirae and M. ninguidus Biserov, 1999. The new species differs from M. tibetanus in the characters of the cuticular ornamentation, in having only two macroplacoids, in lacking both the microplacoid, and cuticular bar on the legs I–III. The new species differs from M. ornatus in having different cuticular ornamentation (Figs 10A,C and 12A). In M. schnurae sp. nov . the stylet supports are inserted on the buccal tube in a more cephalic position ( pt values from 62.4 to 64.3 in M. schnurae sp. nov ., from 69.1 to 70.5 in M. ornatus, ), the buccal tube is slightly wider, and placoids and claws are slightly longer (Table 8). Mixibius schnurae sp. nov . differs from M. sutirae in having a different cuticular ornamentation (Figs 10A, C and 12D), in having the stylet supports inserted on the buccal tube in a more cephalic position ( pt values from 62.4 to 64.3 in M. schnurae sp. nov ., from 70.5 to 70.8 in M. sutirae ) and slightly longer placoids (Table 8). The new species differs from M. ninguidus in having a different cuticular ornamentation, longer buccal tube and shorter second placoid (Table 8). One may hypothesize that before the genus Mixibius was created and described, some species belonging to this genus had been attributed to Isohypsibius . For this reason we compared Mixibius schnurae sp. nov . with species of Isohypsibius possessing ornamented cuticles. We noted that in some characters the new species is similar to Isohypsibius gilvus. However, we noted difference in the cuticular ornamentation and, in addition, the new species has wider buccal tube, shorter second macroplacoid (though the values of the pt index are not that different due to the I. gilvus buccal tube being slightly shorter with respect to the body size), and small lunules are present. : Published as part of Pilato, Giovanni, Lisi, Oscar & Binda, Maria Grazia, 2010, Tardigrades of Israel with description of four new species, pp. 1-28 in Zootaxa 2665 on pages 21-24 : {"references": ["Biserov, V. (1999) A review of the Tardigrada from Novaya Zemlya, with descriptions of three new species, and an evaluation of the environment of this region. Zoologischer Anzeiger, 238, 199 - 182.", "Li, H. & Li, X. (2008) Two new species of Hypsibiidae (Tardigrada: Eutardigrada) from China. Proceeding of the Biological Society of Washington, 121, 41 - 48."]} Text Novaya Zemlya DataCite Metadata Store (German National Library of Science and Technology)