Eohypsibioidea from Bertolani & Kristensen 1987 in Marley et al. 2011: “Parachela; claws asymmetric (2121); Eohypsibiidae-type claw pairs; apophysis for the insertion of the stylet muscles (AISM) ridged with lateral caudal processes of crests and hooks.”
Eohypsibioidea from Bertolani et al. 2014: “Double claws of Eohypsibius type (i.e. subdivided into three distinct sections, one on top of the other), and asymmetrical with respect to the median plane of the leg (sequence 2121), with the ability to rotate on their base; double claws similar in size and shape on the same leg; 14 peribuccal lamellae; buccal tube completely rigid, or caudally annulated, in any case with dorsal and ventral crest-shaped apophyses for the insertion of the stylet muscles. Eggs laid freely and surrounded by an ornamented shell.”
Eohypsibiidae from Marley et al. 2011: “Eohypsibiidae-type claws, which are clearly delineated by septa, in linear order, from basal section, secondary branch and primary branch. The angle between basal section, secondary branch and primary branches are different between claws on the same leg and the internal claw can rotate on its base by 180°.”
Genus description from Bertolani 1981: “Amphibolus-type claws (that is asymmetric claws, each constituted of three clearly defined sections one on top of the other), crest-shaped appendices for the insertion of stylet muscles on the buccal tube, buccal lamellae curving inwards, and freely laid ornamented eggs.”
![](https://tardigrada.help/wp-content/uploads/2023/03/claws-eohypsibius.jpg)
![](https://tardigrada.help/wp-content/uploads/2023/03/buccal-bertolanius.jpg)
![](https://tardigrada.help/wp-content/uploads/2023/03/furca-typical.jpg)
Citations:
Bertolani R. 1981. The taxonomic position of some eutardigrades. Bollettino di zoologia. 48: 197-203.
Bertolani R, Guidetti R, Marchioro T, Altiero T, Rebecchi L, Cesari M. 2014. Phyloeny of Eutardigrada: New molecular data and their morphological support lead to the identification of new evolutionary lineages. Molecular Phylogenetics and Evolution. 76: 110-126.
Bertolani R, Kristensen RM. 1987. New records of Eohypsibius nadjae Kristensen, 1982, and revision of the taxonomic position of two genera of Eutardigrada (Tardigrada). In “Biology of Tardigrades.” (Ed. R Bertolani) pp. 359-372. (U.Z.I., I Mucchi: Modena, Italy).
Marley NJ, McInnes SJ, Sands CJ. 2011. Phylum Tardigrada: A re-evaluation of the Parachela. Zootaxa. 2819: 51-64.