Macrobiotus dariae
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BibTeX: @article{Pilato2004Zootaxa638, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Pilato2004Zootaxa638">{{Citation |
Ordo: Parachela
Familia: Macrobiotidae
Genus: Macrobiotus
Name
Macrobiotus dariae Pilato, Giovanni, 2004 – Wikispecies link – Pensoft Profile
- Macrobiotus dariae Pilato, Giovanni, 2004, Zootaxa 638: 2-5.
Materials Examined
Material examined:Holotype, 57paratypes and 10 eggs: Cyprus, Trodos Mountains, 1350 m a.s.l., moss sample 10. 0 4.1974, leg. Mario Bertolani.
Description
Description of the holotype: Body length, 455.0 µm (Fig. 1 A); colourless, cuticle smooth but with small circular and elliptical pores; very obvious dots present on the legs and on the caudal end of the body. Eyes present. Buccopharyngeal apparatus of Macrobiotus type (Fig. 1 B); rigid buccal tube with ventral lamina; 46.5 µm long and 7.3 µm wide (external diameter) (pt = 15.7). Ten peribuccal lamellae present; a narrow band of very small teeth (unfortunately difficult to see in all specimens), present in the caudal portion of the buccal cavity (an anterior band of teeth is not visible); also a posterior system of three dorsal and three ventral transverse ridges are present; mediodorsal ridge thin; medioventral ridge short and thin. Stylet supports inserted on the buccal tube wall at 77.2 % of its length. Pharyngeal bulb (44.6 µm x 42.2 µm) with well developed apophyses, two rodshaped macroplacoids and microplacoid. First macroplacoid, with a central constriction, 15.5 µm long (pt = 33.3); second 10.2 µm long (pt = 21.9); microplacoid 3.7 µm long (pt = 8.0). Entire placoid row 29.6 µm long (pt = 63.6); macroplacoid row 25.8 µm (pt = 55.5). Claws of hufelandi type (Fig. 1 C, E); the basal portion, well developed, is narrower than the rest of the claw; well developed accessory points present on the main branches. Lunules present (small and smooth on the first three pairs of legs, larger and with crenate margin on the hind legs). A cuticular bar is present near the lunules on the first three pairs of legs. Eggs laid freely (Fig. 1 D), spherical, with small conical, flexible, processes (34–38 on the circumference); diameter 133,0 µm excluding processes, 150.0 µm including them; egg processes smooth, 7.0– 7.5 µm high, basal diameter 6.3–7.3 µm. A crown of meshes surrounds the base of each process, therefore the egg shell has a reticular design (Fig. 1 D).
Discussion
Remarks: The paratypes are similar to the holotype as regards both qualitative and quantitative characters (Table 1).
Etymology
Etymology: The name dariae is in honour of Daria Bertolani Marchetti, Professor of Botany at the University of Modena, whose memory we wish to dedicate a species collected by her husband. Differential diagnosis:Macrobiotus dariae sp. n. differs from Macrobiotus recens Cuénot, 1932 in the following features: less evident cuticular pores; weaker buccal armature (anterior band of teeth probably absent, thinner transversal ridges, less evident posterior band of teeth); stylet supports inserted on the buccal tube in a more cephalic position (pt = 77.2–77.9 in M. dariae sp. n. and 81.0– 82.6 in Macrobiotus recens) (Figs 1 B and 2 A); more slender claws (with a longer basal portion) (Figs 1 C, E and 2 B). New species differs also in some characters of the eggs (Figs 1 D and 2 C, D): (egg shell with a reticular sculpture and without dots; egg processes more numerous (3438 on the circumference in M. dariae sp. n. and 21–22 in M. recens), shorter (7.0– 7.5 µm in M. dariae sp. n. and 12.5–13.8 µm in M. recens), with narrower basal diameter (6.3–7.3 µm in M. dariae sp. n. and 10.6–11.4 µm in M. recens). Besides, processes in M. dariae sp. n. are smooth (in M. recens they have (Fig. 2 D) very small, flexible spikes, difficult to see, on the distal portion), and with less evident basal digitations. The new species differs from Macrobiotus glebkai Biserov, 1990 by the presence of obvious dots on the legs and on the posterior portion of the body; and in some characters of the eggs which have more numerous processes on the circumference (34–38 in M. dariae sp. n. and 12–14 in M. glebkai), and egg shell with a reticular design with small meshes.
Taxon Treatment
- Pilato, Giovanni; Bertolani, Roberto; 2004: Macrobiotus dariae sp. n., a new species of eutardigrade (Eutardigrada, Macrobiotidae) from Cyprus, Zootaxa 638: 2-5. doi
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