Milnesium

• Main Author: Tumanov, Denis V.
• Format: Text
• Language: unknown
• Published: Zenodo 2006
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Phyllodocida; Aphroditidae; Milnesium; Antarc*
• Online Access: https://dx.doi.org/10.5281/zenodo.6255506; https://zenodo.org/record/6255506

Key to the determination of recent species of the genus Milnesium . (adult females) 1. Claws of all legs without main branches.................................. Milnesium dujiangensis ­ Claws of all legs with main branches........................................................................... 2 2. Cuticle reticulated 1...................................................................................................... 3 ­ Cuticle smooth............................................................................................................. 4 3. With gibbosities on dorsal surface and eyespots. Inner claws of all legs with basal spurs ..................................................................................................... Milnesium reticulatum ­ Without gibbosities and eyespots. Claws of all legs without basal spurs....................... ...................................................................................................... Milnesium katarzynae 4. Buccal tube wide and short, with its diameter decreasing to the caudal end. Its diameter in the region of mouth opening exceed 30 µm ..................... Milnesium eurystomum ­ Buccal tube cylindrical, with diameter lesser then 30 µm............................................ 5 5. Without accessory points on main claw branches......................................................... 6 ­ With accessory points on main claw branches.............................................................. 7 6. Outer claws without basal spurs; length ratio between complex base+secondary branch and basal spur of inner claws do not exceed 2.5................................................. .......................................................................................... Milnesium reductum sp. nov. ­ All claws with basal spurs; length ratio between complex base+seconfary branch and basal spur not lesser then 3.......................................... Milnesium longiungue sp. nov. 7. Short claws; pt value for main claw branches in legs IV lesser then 40, pt value for complex base+secondary branch in legs IV lesser then 30 ...... Milnesium brachyungue ­ Longer claws; pt value for main claw branches in legs IV larger then 40; pt value for complex base+secondary branch in legs IV larger then 30........................................... 8 8. Longer, more subtile claws; pt value for main claw branches in legs IV larger then 60....................................................................................................................................... 9 ­ Shorter, more massive claws; pt value for main claw branches in legs IV lesser then 60.................................................................................................................................... 10 9. Buccal tube length exceed 50 µm; length of the main claw branches in legs IV exceed 30 µm; with basal spurs on all claws ............................... Milnesium asiaticum sp. nov. ­ Buccal tube length not exceed 42 µm (usually lesser then 40 µm); length of the main claw branches in legs IV not exceed 30 µm; outer claws on legs I–III and both claws on hind legs lacks basal spur ........................................ Milnesium almatyense sp. nov. 10. Pt ss value more then 70 (70.7–75.9); with basal spurs on all claws................................................................................................................... Milnesium antarcticum sp. nov. ­ Pt ss value lesser then 70 (usually 63–66); basal spurs of outer claws could be reduced.................................................................................................................................... 11 11. Four peribuccal lamellae; pt ss value 61.98–64.37 (according to Pilato & Binda 1991); 1. This character is also noted in some populations of Milnesium tardigradum (Nelson & Horning 1979) but in my opinion this material should be reinvestigated to ascertain its taxonomic position. in the complex base+secondary branch apical points are almost equal in size............... .............................................................................................. Milnesium tetralamellatum ­ Six peribuccal lamellae; pt ss value 62.7–67.7; in the complex base+secondary branch point a is distinctly smaller then point b................................... Milnesium tardigradum : Published as part of Tumanov, Denis V., 2006, Five new species of the genus Milnesium (Tardigrada, Eutardigrada, Milnesiidae), pp. 1-23 in Zootaxa 1122 on pages 22-23, DOI: 10.5281/zenodo.171737 : {"references": ["Pilato, G. & Binda, M. G. (1991) Milnesium tetralamellatum new species of Milnesiidae from Africa (Eutardigrada). Tropical Zoology, 4, 103 - 106."]}