Milnesium Doyère, 1840

Rocha, Alejandra M., González-Reyes, Andrea X., Ostertag, Belén & Lisi, Oscar, 2022, The genus Milnesium (Eutardigrada, Apochela, Milnesiidae) in Argentina: description of three new species and key to the species of South America, European Journal of Taxonomy 822 (1), pp. 1-54 : 47-48

publication ID	https://doi.org/10.5852/ejt.2022.822.1807
publication LSID	lsid:zoobank.org:pub:522FD009-B4C9-4A80-871E-883E2EBE09C8
DOI	https://doi.org/10.5281/zenodo.6620673
persistent identifier	https://treatment.plazi.org/id/E27887D6-CA4D-FFD1-FF25-FC2AFB48FE03
treatment provided by	Felipe (2022-06-07 12:33:16, last updated by Juliana 2024-12-04 14:15:21)
scientific name	Milnesium Doyère, 1840
status

Treatment

Dichotomous key of the species of Milnesium Doyère, 1840 View in CoL from South America

1. Dorsal cuticle smooth ....................................................................................................................... 2

– Dorsal cuticle ornamented (pseudopores-reticulum-dimples) .......................................................... 5

2. Claw configuration [2-2]-[2-2] .......................................................... M. kogui Londoño et al., 2015 View in CoL

– Claw configuration [3-3]-[3-3] ......................................................................................................... 3

3. BT funnel-shaped in adults (posterior/anterior width ratio lower than 65%) ..................................... .............................................. M. eurystomum Maucci, 1991 View in CoL (amended by Michalczyk et al. 2012b; amended by Morek et al. 2020a)

– BT about cylindrical in adults (posterior/anterior width ratio higher than 75%) ............................. 4

4. Pt of BT standard width lower than 52 in adults .................. M. brachyungue Binda & Pilato, 1990 View in CoL

– Pt of BT standard width higher than 52 in adults .............................................. M. quiranae View in CoL sp. nov.

5. Claw configuration [3-3]-[3-3] ......................................................................................................... 6

– Claw configuration different ............................................................................................................. 7

6. Nine rows of pseudoplates, pt of SS [63.8–66.7]; pt of BT standard width [58.1–65.6] ................... ..................................................................................................... M. beatae Roszkowska et al., 2015 View in CoL

– Without pseudoplates, pt of SS [70.0–73.7], pt of BT standard width [24.2–32.3] ........................... ............................................................................................ M. argentinum Roszkowska et al., 2015 View in CoL

7. Claw configuration [2-2]-[2-2] .............................................. M. katarzynae Kaczmarek et al., 2004 View in CoL

– Claw configuration different ............................................................................................................. 8

8. Claw configuration [2-3]-[2-2], pt of BT standard width [46.1–56.9], with 9 rows of pseudoplates ... ................................................................................................................................... M. irenae View in CoL sp. nov.

– Claw configuration [2-3]-[3-2] .............................................................................................................9

9. Cuticular dimples arranged in 10 bands, small tubercles around all claw bases, pt of BT standard width [55.2–64.0], young specimens with claw configuration [2-2]-[2-2] .... M. pelufforum View in CoL sp. nov.

– Cuticular dimples present not forming bands, pt of BT standard width [33.0–38.0], no tubercles around claw bases ..................................................... M. krzysztofi Kaczmarek & Michalczyk, 2007

Abbreviations: BT = buccal tube; SS = stylet support insertion point on the buccal tube.

References

Binda M. G. & Pilato G. 1990. Tardigradi di terra del fuoco e Magallanes. Milnesium brachyungue, nuova specie di tardigrado Milnesidae. Animalia 17: 105 - 110.

Kaczmarek L., Michalczyk L. & Beasley C. W. 2004. Milnesium katarzynae sp. nov., a new species of eutardigrade (Milnesiidae) from China. Zootaxa 743 (1): 1 - 5. https: // doi. org / 10.11646 / zootaxa. 743.1.1

Kaczmarek L. & Michalczyk L. 2007. A new species of Tardigrada (Eutardigrada: Milnesiidae): Milnesium krzysztofi from Costa Rica (Central America). New Zealand Jounal of Zoology 34 (4): 297 - 302. https: // doi. org / 10.1080 / 03014220709510088

Londono R., Daza A., Caicedo M., Quiroga S. & Kaczmarek L. 2015. The genus Milnesium (Eutardigrada: Milnesiidae) in the Sierra Nevada de Santa Marta (Colombia), with the description of Milnesium kogui sp. nov. Zootaxa 3955 (4): 561 - 568. https: // doi. org / 10.11646 / zootaxa. 3955.4.7

Maucci W. 1991. Tre nuove specie di Eutardigradi della Groenlandia meridionale. Bollettino del Museo Civico di Storia Naturale di Verona 15: 279 - 289.

Michalczyk L., Welnicz W., Frohme M. & Kaczmarek L. 2012 b. Corrigenda of Zootaxa, 3154: 1 - 20 Redescriptions of three Milnesium Doyere, 1840 taxa (Tardigrada: Eutardigrada: Milnesiidae), including the nominal species for the genus. Zootaxa 3393 (1): 66 - 68. https: // doi. org / 10.11646 / zootaxa. 3393.1.6

Morek W., Blagden B., Kristensen R. & Michalczyk L. 2020 a. The analysis of inter- and intrapopulation variability of Milnesium eurystomum Maucci, 1991 reveals high genetic divergence and a novel type of ontogenetic variation in the order Apochela. Systematics and Biodiversity 18 (5): 1 - 19. https: // doi. org / 10.1080 / 14772000.2020.1771469