Macrobiotidae

Pilato, Giovanni & Binda, Maria Grazia, 2010, Definition of families, subfamilies, genera and subgenera of the Eutardigrada, and keys to their identification, Zootaxa 2404, pp. 1-54: 49

publication ID

http://doi.org/ 10.5281/zenodo.194138

persistent identifier

http://treatment.plazi.org/id/EE2D87E0-FFC4-FF87-FF1F-FCF697AAF843

treatment provided by

Plazi

scientific name

Macrobiotidae
status

 

Key to the genera of Macrobiotidae  

1. Claws on the fourth pair of legs reduced to granular rudiments or absent; claws on the first three pairs of legs of the Xerobiotus   type ( Fig. 20 View FIGURE 20 E) ............................................................................................................ Pseudohexapodibius  

- Claws on the fourth pair of legs normally developed.................................................................................................. 2

2. Bucco-pharyngeal apparatus with rigid tube ................................................................................................................ 3

- Bucco-pharyngeal apparatus with the tube subdivided into an anterior rigid and a flexible caudal tract .................. 11

3. Claws of the hufelandi   type ( Figs. 1 View FIGURE 1 F, 20 C); peribuccal lamellae may be present or absent ....................................... 4

- Claws different; peribuccal lamellae present................................................................................................................ 9

4. Dorsal wall of the buccal tube smooth (without ridge or hook). Branches of the stylet furcae typically shaped ( Fig. 4 View FIGURE 4 A), i. e., with thickened, swollen, rounded apices ...................................................................................................... 5

- Dorsal wall of the buccal tube with a dorsal ridge or hook. Branches of the stylet furcae with thickened but not swol- len apices ( Fig. 4 View FIGURE 4 B) ....................................................................................................................................................... 8

5. Double systems of transverse ridges present in the buccal armature ( Fig. 21 View FIGURE 21 B)..................................... Famelobiotus  

- Only one (well or less developed) system of dorsal and ventral transverse ridges present in the buccal armature..... 6

6. Peribuccal lamellae absent. Peribuccal papulae present. Buccal tube narrow or very narrow; stylet supports inserted on the bucal tube at 48–73 % of its length in the known species ( Fig. 22 View FIGURE 22 C, D)........................................... Minibiotus  

- Peribuccal lamellae present. Stylet supports inserted on the buccal tube at well over half its length ( Fig. 21 View FIGURE 21 A) ........ 7

7. All the following characters present: claws of the hufelandi   type; cuticle without pores; buccal tube wide; three rod- shaped macroplacoids; microplacoid distant from the third macroplacoid (more than its length) ( Fig. 21 View FIGURE 21 C); eggs with conical processes and areolated egg shell .......................................................................................... Paramacrobiotu s

- Claws of the hufelandi   type. At least one of the above indicated characters is different; in particular, when three macroplacoids and microplacoid are present, the microplacoid is not so distant from the third macroplacoid ( Fig. 21 View FIGURE 21 A) ........................................................................................................................................................... Macrobiotus  

8. Dorsal wall of the buccal tube and anterior tract of the ventral lamina with a ridge but without a hook ( Fig. 22 View FIGURE 22 A)..... ................................................................................................................................................................... Adorybiotus  

- Both buccal tube dorsal wall and anterior tract of the ventral lamina with a hook ( Fig. 22 View FIGURE 22 B) ..................... Richtersius  

9. Claws of the Xerobiotus   type ( Fig. 20 View FIGURE 20 E) ....................................................................................................... Xerobiotus  

- Claws of the Calcarobiotus   type, at least on the first three pairs of legs ( Fig. 20 View FIGURE 20 A,B) ............................................. 10

10. Claws of the Calcarobiotus   type with very long accessory points connected to the primary branch by a flexible tract ( Fig. 20 View FIGURE 20 B) ...................................................................................................................................................... Schusterius  

- Accessory points normally developed ( Fig. 20 View FIGURE 20 A) ................................................................................... Calcarobiotus   (see below the key to the subgenera)

11. Claws of the Biserovus   type ( Fig. 20 View FIGURE 20 F). Peribuccal lamellae present ( Fig. 23 View FIGURE 23 A).......................................... Biserovus  

- Claws of the hufelandi   type ( Figs. 1 View FIGURE 1 F, 20 C). Peribuccal lamellae present or absent.................................................. 12

12. Peribuccal lamellae absent, peribuccal papulae present ( Fig. 23 View FIGURE 23 B). Branches of the stylet furcae typically shaped ( Fig. 23 View FIGURE 23 B) ....................................................................................................................................................... Minilentus  

- Peribuccal lamellae present ( Fig. 23 View FIGURE 23 C). Branches of the stylet furcae arched and converging backwards ( Figs. 4 View FIGURE 4 C, 23 C)............................................................................................................................................................. Insuetifurca