Belongs within: Brachypylina.
The Basilobelbidae are a pantropical group of oribatid mites bearing scalps attached to the notogaster by an anterior medial tubercle. The chelicerae are peloptoid and covered by a pointed rostrum in the genus Xiphobelba whereas Basilobelba have dentate chelicerae and a rounded rostrum. Species of Xiphobelba are known from southern Asia and Melanesia (Subías 2004).
Characters (from Norton & Behan-Pelletier 2009): Length 400–750 µm. Gnathosoma normal; chelicerae with dentate chelae, two setae; rutella normally developed. Prodorsum without true lamellae; bothridial seta with ringlike thickenings proximally. Scalps present, tightly affixed on medial tubercle at anterior of notogaster; octotaxic system absent; dorsophragmata and pleurophragmata absent; paired opisthonotal glands opening directly on notogaster. Circumventral carina present curving posterior to anal plates; genital plates with seven pairs of setae. Trochanter II with broad ventral keel mimicking pedotectum II; tibiae and tarsi without porose areas; setae p absent from tarsi II to IV.
Basilobelbidae
|--Xiphobelba Csiszár 1961S04
| |--*X. hamanni Csiszár 1961 [incl. X. margosetosa Hammer 1979]S04
| |--X. barbata Talukdar & Chakrabarti 1984S04
| |--X. ismalia Haq 1980S04
| |--X. mindanensis Corpuz-Raros 1980S04
| `--X. setosa Aoki 1968S04
`--Basilobelba Balogh 1958 [incl. Hammation Grandjean 1959]S04
|--*B. retiaria (Warburton 1912)S04 [=Damaeus retiariusS04, B. retiariusH98, Hammation retiariusH98]
| |--B. r. retiariusS04
| `--B. r. symmetrica Wallwork 1962S04
|--B. aethiopica Bernini 1988S04
|--B. africana Wallwork 1961S04
|--B. atimonensis Corpuz-Raros 1980S04
|--B. baltazarae Corpuz-Raros 1979S04
|--B. barbata Mondal & Kundu 1984S04
|--B. cendanai Corpuz-Raros 1980S04
|--B. foliata Hammer 1982S04
|--B. indica Bhaduri, Chakrabarti & Raychaudhuri 1974S04
|--B. insularis Mahunka 1985S04
|--B. monstruosetosa Mahunka 1974S04
|--B. pacifica Hammer 1971S04
|--B. parmata Okayama 1980 S04
|--B. sollertius (Grandjean 1959)NB-P09, S04 [=*Hammation sollertiusCH98]
`--B. werneri Mahunka 1982S04
*Type species of generic name indicated
REFERENCES
[CH98] Colloff, M. J., & R. B. Halliday. 1998. Oribatid Mites: A catalogue of Australian genera and species. CSIRO Publishing: Collingwood.
[H98] Halliday, R. B. 1998. Mites of Australia: A checklist and bibliography. CSIRO Publishing: Collingwood.
[NB-P09] Norton, R. A., & V. M. Behan-Pelletier. 2009. Suborder Oribatida. In: Krantz, G. W. & D. E. Walter (eds) A Manual of Acarology 3rd ed. pp. 430–564. Texas Tech University Press.
[S04] Subías, L. S. 2004. Listado sistemático, sinonímico y biogeográfico de los ácaros oribátidos (Acariformes, Oribatida) del mundo (1758–2002). Graellsia 60 (número extraordinario): 3–305.