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

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

DOI

https://doi.org/10.5281/zenodo.6207203

persistent identifier

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

treatment provided by

Plazi

scientific name

Macrobiotidae
status

 

Key to the genera of Macrobiotidae View in CoL

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 View in CoL type ( Fig. 20 View FIGURE 20 E) ............................................................................................................ Pseudohexapodibius View in CoL

- 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 View in CoL type ( Figs. 1 View FIGURE 1 F, 20C); 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 View in CoL

- 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 View in CoL

- 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 View in CoL 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 View in CoL 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 View in CoL

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 View in CoL

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

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

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

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

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

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

- Claws of the hufelandi View in CoL type ( Figs. 1 View FIGURE 1 F, 20C). 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 View in CoL

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

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