Protracheatan.
/ˌprəʊtreɪkɪˈɑːtə/, /ˌprəʊtrakɪˈeɪtə/, U.S. /ˈˌproʊˌtreɪkiˈɑdə/, /ˈˌproʊˌtrækiˈeɪdə/ Zoology. Now disused.
With singular agreement: (in Gegenbaur's classification) a class of animals (equivalent to the phylum Onychophora) containing the single genus Peripatus (cf. Peripatus n.2), which he regarded as an arthropod. With plural agreement: animals of this class collectively.
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Onychophora > [noun] > class Protracheata
Protracheata1874
1874 H. N. Moseley in Proc. Royal Soc. 22 349 The Protracheata probably had their tracheæ thus diffused.
1906 Science 5 Jan. 36/1 I have shown that they [sc. aberrant chromosomes] are not present in the Protracheata (Peripatus).
1938 Amer. Midland Naturalist 19 619 In the system of animal life Tardigrades..are listed between the Protracheata (Onychophora) and the Eutracheata.
Derivatives
proˈtracheate n. and adj. disused (a) n.an animal of the former class Protracheata; an onychophoran; (b) adj. of or relating to the former class Protracheata (rare).
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Onychophora > [noun] > class Protracheata > member of
protracheate1874
1874 Proc. Royal Soc. 1873–4 22 349 The original Protracheate being supposed to have had numerous small tracheæ diffused all over its body.
1890 Cent. Dict. Protracheate, of or pertaining to the Protracheata; malacopodous; onychophorous; peripatidean.
1903 Science 18 Sept. 368/2 The recognition of..a group Arthropoda including crustaceans, arachnids, protracheates and tracheates.
This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).
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n.1874