Tactopoda
Tactopoda is a proposed clade of protostome animals that includes the phyla Tardigrada and Euarthropoda, supported by various morphological observations.[1][2]
| Tactopoda | |
|---|---|
 | |
| The tardigrade Hypsibius dujardini | |
 | |
| The blue crab Callinectes sapidus, an arthropod | |
Scientific classification  | |
| Kingdom: | Animalia |
| Clade: | ParaHoxozoa |
| Clade: | Bilateria |
| Clade: | Nephrozoa |
| (unranked): | Protostomia |
| Superphylum: | Ecdysozoa |
| (unranked): | Panarthropoda |
| (unranked): | Tactopoda Budd, 2001 [1] |
The competing hypothesis is Arthropoda (= Euarthropoda + Onychophora)[3]
Classification
- Phylum Tardigrada
- Class Eutardigrada
- Class Heterotardigrada
- Class Mesotardigrada
- Phylum Arthropoda
- Class Pycnogonida (?)
- Clade Arachnomorpha
- Class †Trilobita
- Order †Aglaspida
- Order †Strabopida
- Class Pycnogonida (?)
- Order †Cheloniellida
- Subphylum Chelicerata
- Class Xiphosura
- Class †Eurypterida
- Class †Chasmataspidida
- Class Pycnogonida (?)
- Class Arachnida
- Clade Mandibulata
- Order †Euthycarcinoidea
- Subphylum Myriapoda
- Clade Pancrustacea
- Clade Oligostraca
- Class Ostracoda
- Some of polyphyletic class Maxillopoda
- Clade Altocrustacea
- Clade Multicrustacea
- The rest of polyphyletic class Maxillopoda
- Class Malacostraca
- Clade Allotriocarida
- Class Branchiopoda
- Clade Miracrustacea
- Superclass Xenocarida
- Class Cephalocarida
- Class Remipedia
- Subphylum Hexapoda
- Paraphyletic class Entognatha
- Clade Ectognatha
- Class Insecta
- Superclass Xenocarida
- Clade Multicrustacea
- Clade Oligostraca
Phylogeny
| Panarthropoda |
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References
- Graham E. Budd (2001). "Tardigrades as 'stem-group arthropods': the evidence from the Cambrian fauna" (PDF). Zoologischer Anzeiger. 240 (3–4): 265–279. doi:10.1078/0044-5231-00034. Archived from the original (PDF) on 2016-03-03.
- Smith, M. R.; Ortega Hernández, J. (2014). "Hallucigenia's onychophoran-like claws and the case for Tactopoda". Nature. 514 (7522): 363–366. doi:10.1038/nature13576. PMID 25132546.
- J. Ortega-Hernández, "Making sense of 'lower' and 'upper' stem-group Euarthropoda, with comments on the strict use of the name Arthropoda von Siebold, 1848," Biol. Rev., vol. 91, no. 1, pp. 255–273, 2016.
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