Tactopoda

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Tactopoda
Waterbear.jpg
The tardigrade Hypsibius dujardini
The Childrens Museum of Indianapolis - Atlantic blue crab.jpg
The blue crab Callinectes sapidus, an arthropod
Scientific classification e
Kingdom: Animalia
Subkingdom: Eumetazoa
Clade: Bilateria
Clade: Nephrozoa
(unranked): Protostomia
Superphylum: Ecdysozoa
(unranked): Panarthropoda
(unranked): Tactopoda
Budd, 2001 [1]

Tactopoda is a proposed clade of protostome animals that includes the phyla Tardigrada and Euarthropoda, supported by various morphological observations.[1][2]

The competing hypothesis is Arthropoda (= Euarthropoda + Onychophora)[3]

Classification[edit]

Phylogeny[edit]

Panarthropoda

Velvet worms (Onychophora)


Tactopoda
Tardigrada

Eutardigrada



Heterotardigrada



Mesotardigrada



Arthropoda

Trilobitomorpha/Trilobita



?Pycnogonida


Chelicerata

Xiphosura





Eurypterida



Chasmataspidida





Arachnida



?Pycnogonida





Mandibulata
Myriapoda

Symphyla



Chilopoda




Diplopoda



Pauropoda




Pancrustacea
Oligostraca

Ostracoda



Some of Maxillopoda



Altocrustacea
Multicrustacea

The rest of Maxillopoda



Malacostraca



Allotriocarida
Xenocarida

Remipedia



Cephalocarida




Branchiopoda


Hexapoda
Ellipura

Collembola



Protura




?Diplura




?Diplura


Ectognatha

Insecta












References[edit]

  1. ^ a b 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. 
  2. ^ 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. 
  3. ^ 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.