Milnesium
Creators: name: Tumanov, Denis V.
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Phyllodocida
Aphroditidae
Milnesium

description: 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
description: 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