Belongs within: Vericrustacea.
The Tantulocarida are a group of minute marine crustaceans ectoparasitic on other crustaceans: they have been recorded from copepods, cumaceans, isopods, ostracods and tanaids (Boxshall 1988). Other than paired antennules at one stage of the life cycle, tantulocaridans completely lack cephalic appendages (Martin & Davis 2001).
Tantulocarida
| i. s.: Stygotantulus stocki MD01
|--Microdajidae B88
|--Doryphallophoridae MD01
|--Onceroxenidae MD01
|--Basipodella [Basipodellidae] B88
| |--B. atlantica B88
| `--B. harpacticola B88
`--Deoterthridae B88
|--Austrotantulus Boxshall 1988 B88
| `--*A. lincolni Boxshall 1988 B88
`--Deoterthron B88
|--*D. dentatum B88
|--D. aselloticola B88
|--D. harrisoni B88
`--D. megacephala B88
*Type species of generic name indicated
REFERENCES
[B88] Boxshall, G. A. 1988. A new genus of tantulocaridan (Crustacea: Tantulocarida) parasitic on a harpacticoid copepod from Tasmania. Bulletin of the British Museum (Natural History), Zoology series 54 (6): 271-274.
[MD01] Martin, J. W., & G. E. Davis. 2001. An updated classification of the Recent Crustacea. Natural History Museum Los Angeles County, Science Series 39: 1-124.