Eremobiotus ginevrae, Lisi, Oscar, Binda, Maria Grazia & Pilato, Giovanni, 2016
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publication ID |
https://doi.org/ 10.11646/zootaxa.4103.4.3 |
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publication LSID |
lsid:zoobank.org:pub:03887B27-2220-4F28-9889-B39E9789406B |
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DOI |
https://doi.org/10.5281/zenodo.6087465 |
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persistent identifier |
https://treatment.plazi.org/id/03D087EB-1B52-A717-C5E0-FB82FE48FE61 |
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treatment provided by |
Plazi |
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scientific name |
Eremobiotus ginevrae |
| status |
sp. nov. |
Eremobiotus ginevrae sp. nov.
( Figs. 1 View FIGURE 1 , 2 View FIGURE 2 )
Type locality: Turcisi Mount, (Sferro, Castel di Judica, Sicily), 37°30′03″ N 14°47′ 50″E. Mosses on clay at 78 m a.s.l. collected by Vera D’Urso in May 2006.
Material examined. Holotype (slide no. 5530) and 7 paratypes from the same locality (slides nos. 2388-91, 5528, 5529, 5531-5535). In addition to this material, we examined paratypes, preserved in the Binda and Pilato collection, from the following Sicilian localities: Nebrodi Mountains: Torrente della Saracena, Sicily (3 specimens, slides nos. 5543-5544); Simeto River: Adrano, Sicily (5 specimens, slides nos. 1704-1708). Other material examined: Etna, Zafferana Etnea: Piano d’Api, Sicily (1 specimen, slide no. 969); Madonie: Gangivecchio, Sicily (4 specimens, slides nos. 5537, 5561-63); in addition, we examined specimens from Israel: one specimen Mt. Hermon (slide no. 5327), 3 specimens from Jerusalem: Sanhedria (slides nos. 5328–5330) kindly sent by Chanan Dimentman and Heather Schnur (University of Jerusalem), and one specimen from Russia: Novocherkassk (Rostov-on-Don district) (slide no. 3358) (kindly sent by Vladimir Biserov).
Specific diagnosis. Colourless, cuticle smooth; eye spots present in the examined living specimens; buccopharyngeal apparatus of the Isohypsibius type; peribuccal lamellae absent; pharyngeal bulb with two macroplacoids; microplacoid absent. External claws of the first three pairs of legs of the Isohypsibius type; internal claws of the same type but modified as regards the angle between the main and the secondary branches, it being clearly wider than in the typical Isohypsibius type. Both anterior and posterior claws of the hind legs more greatly modified, which is a character of the genus: the two branches of each claw are joined in a long basal portion of their length, constituting a wide triangular common tract from which the terminal portions of the branches diverge with an angle of almost 180°. Claw accessory points of legs I–III without a visible free portion emerging from the main branches; whereas accessory points of the hind leg claws, in comparison very evident. Lunules on the first three pairs of legs smooth; those on the hind legs with small marginal teeth. A long, cuticular bar is present on the first three pairs of legs. Eggs smooth laid in the exuviae.
Description of the holotype. Body length 308 µm; colourless; eye spots present before mounting; cuticle smooth.
Isohypsibius type bucco-pharyngeal apparatus ( Fig. 1 View FIGURE 1 A,B), i.e. with rigid buccal tube, without ventral lamina and with dorsal and ventral apophyses for the insertion of the stylet muscles in the shape of ridges symmetrical with respect to the frontal plane ( Fig. 1 View FIGURE 1 B).
Mouth without peribuccal lamellae; three dorsal and three ventral thin transverse ridges and a band of extremely small teeth present in the caudal portion of the oral cavity ( Fig. 1 View FIGURE 1 A); no teeth are visible in the anterior portion of the oral cavity. Buccal tube 34.0 µm long and 5.7 µm wide externally (pt = 16.8); stylet supports inserted on the buccal tube at 70.0% of its length (pt = 70.0). Pharyngeal bulb with caudally forked apophyses and two macroplacoids, the first of which with a marked central narrowing ( Fig. 1 View FIGURE 1 A,B) and the second with a pre-terminal narrowing. First macroplacoid 7.8 µm long (pt = 22.9), second 5.0 µm (pt = 14.7), entire placoid row 14.0 µm long (pt = 41.2).
External claws of the first three pairs of legs of the Isohypsibius type ( Figs.1 View FIGURE 1 A,C and 2AB); the internal claws are modified in that the angle between the main and secondary branches is greater than in the typical Isohypsibius type claws. Both anterior and posterior claws of the hind legs more greatly modified as is characteristic of the genus: the two branches of each claw are joined to one another for a long portion of their length, constituting a wide, triangular common tract from which the terminal portions of the branches diverge with an angle of almost 180° ( Figs.1 View FIGURE 1 D and 2C,D). External claws of the third pair of legs 12.6 µm long (pt = 37.1); internal claws on the same pair of legs 10.4 µm long (pt = 30.6); posterior claws of the hind legs 12.1 µm long (pt = 35.6). Anterior claw of the same pair of legs 11.5 µm long (pt = 33.8). Claw accessory points on legs I–III without free emerging portion from the main branches ( Figs. 1 View FIGURE 1 C and 2 A,B) while short, but very evident accessory points are present on the main branches of the claws of the hind legs ( Figs. 1 View FIGURE 1 D, arrow a, and 2C,D, arrow a). Lunules present, small and with smooth margin on the first three pairs of legs ( Figs. 1 View FIGURE 1 C, arrow a, and 2A, arrow a); more developed and with small marginal teeth on the hind legs ( Figs. 1 View FIGURE 1 D, arrow b, and 2C,D, arrow b). A well developed, very long, cuticular bar is present on the first three pairs of legs ( Figs.1 View FIGURE 1 C, arrow b, and Fig. 2 View FIGURE 2 A,B, arrow b).
Remarks. The paratypes are similar to the holotype in both morphological and metric characters; the measurements of some structures of the holotype six paratypes are given in Table 1 View TABLE 1 .
Eremobiotus ginevrae sp. nov
Eggs: The eggs are smooth, laid in the exuviae (we counted up 7 eggs, but we cannot exclude higher numbers in other exuviae).
Etymology. The specific name ginevrae is in honour of the young dear grandchild, Ginevra, come to delight her grandparents Maria Grazia and Giovanni.
Differential diagnosis. Previously, only two species had been attributed to the genus Eremobiotus : Eremobiotus alicatai and Eremobiotus ovezovae .
The new species differs from Eremobiotus alicatai by having longer claws ( Table 2 View TABLE 2 ); both external and internal claws, on the first three pairs of legs, with longer terminal portions of the main branches and, as a consequence, the claws of Eremobiotus ginevrae sp. nov. appear to be more slender ( Figs. 2 View FIGURE 2 A,B and 3D); the claws of the hind legs have a shorter common tract and the free portion of the branches appear to be longer ( Figs. 1 View FIGURE 1 D and 3C); the free portion of the accessory points of claws I–III are not visible in Eremobiotus ginevrae sp. nov. ( Fig. 2 View FIGURE 2 A,B) whereas they are in Eremobiotus alicatai ( Fig. 3 View FIGURE 3 D, arrow a); on legs IV the accessory points are very obvious but less developed than in Eremobiotus alicatai . The lunules of the first three pairs of legs are smooth and those of the hind legs have less developed marginal teeth, whereas in Ermobiotus alicatai all lunules have marginal teeth.
The new species differs from Eremobiotus ovezovae by having a smooth cuticle, eye spots present, longer and wider buccal tube ( Table 2 View TABLE 2 ; Figs. 1 View FIGURE 1 A and 4A), clearly longer, differently shaped claws ( Table 2 View TABLE 2 ; Figs. 1 View FIGURE 1 A,C,D and 4B-E) and the free portion of the accessory points not visible on the claws of legs I–III.
TABLE 1. Eremobiotus ginevrae sp. nov.: Measurements in Μm and pt index values relative to some structures for the holotype and six paratypes.
| Slide number | 5535 | 2388 | 5529 | 2391 | 5528 | 5530 | 2389 |
|---|---|---|---|---|---|---|---|
| paratypes | holotype | paratype | |||||
| Body length | 221 | about 230 | 230 | 248 | about 250 | 308 | 360 |
| Buccal tube length | 27.3 | 26.1 | 27.2 | 27.3 | 29.0 | 34.0 | 33.4 |
| External buccal tube width | 3.9 | 3.6 | 3.8 | 3.6 | 4.3 | 5.7 | 5.7 |
| pt | 14.3 | 13.8 | 14.0 | 13.2 | 14.8 | 16.8 | 17.1 |
| pt Stylet supports insertion point | 71.2 | 71.1 | 70.9 | 70.2 | 71.0 | 70.0 | 69.5 |
| First macroplacoid | 5.6 | 5.8 | 6.0 | 5.7 | ? | 7.8 | 8.2 |
| pt | 20.5 | 22.2 | 22.1 | 20.7 | ? | 22.9 | 24.6 |
| Second macroplacoid | 3.6 | 3.6 | 3.8 | 3.6 | ? | 5.0 | 4.9 |
| pt | 13.2 | 13.8 | 14.0 | 13.2 | ? | 14.7 | 14.7 |
| Macroplacoid row | 9.9 | 9.6 | 9.6 | 9.6 | ? | 14.0 | 14.5 |
| pt | 36.3 | 36.8 | 35.3 | 35.2 | ? | 41.2 | 43.4 |
| External claw I | 8.9 | 7.7 | ? | ? | ? | ? | ? |
| pt | 32.6 | 29.5 | ? | ? | ? | ? | ? |
| Internal claw I | 6.8 | 6.3 | 6.6 | 6.9 | 7.7 | 9.6 | ? |
| pt | 24.9 | 24.1 | 24.3 | 25.3 | 26.6 | 28.2 | ? |
| External claw II | ? | 8.0 | ? | ? | ? | ? | ? |
| pt | ? | 30.6 | ? | ? | ? | ? | ? |
| Internal claw II | 8.1 | 6.5 | 7.8 | 7.4 | 8.0 | 10.4 | ? |
| pt | 29.7 | 24.9 | 28.7 | 27.1 | 27.6 | 30.6 | ? |
| External claw III | 9.4 | 8.2 | 8.9 | ? | ? | 12.6 | ? |
| pt | 34.4 | 31.4 | 32.7 | ? | ? | 37.1 | ? |
| Internal claw III | 8.1 | 6.9 | 8.1 | 8.3 | ? | 10.4 | 9.4 |
| pt | 29.7 | 26.4 | 29.8 | 30.4 | ? | 30.6 | 28.1 |
| Posterior claw IV | ? | ? | ? | 10.0 | ? | 12.1 | 11.6 |
| pt | ? | ? | ? | 36.6 | ? | 35.6 | 34.7 |
| Anterior claw IV | ? | ? | ? | 9.0 | 8.4 | 11.5 | ? |
| pt | ? | ? | ? | 32.3 | 29.0 | 33.8 | ? |
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