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单词 ectoprocta
释义

Ectoproctan.

Brit. /ˈɛktə(ʊ)prɒktə/, U.S. /ˈɛktəˌprɑktə/
Origin: A borrowing from Latin. Etymon: Latin Ectoprocta.
Etymology: < scientific Latin Ectoprocta, family name ( H. Nitsche Beitraege zur Kenntniss der Bryozoen I. (1869) 34) < ecto- ecto- comb. form + ancient Greek πρωκτός anus, rump (see procto- comb. form) + scientific Latin -a -a suffix2. Compare Entoprocta n.
Zoology.
Originally: an order or division of the Polyzoa ( Bryozoa) having the anus opening outside the lophophore (cf. Entoprocta n.). Later: = Bryozoa n.After the Entoprocta were removed, the taxa Ectoprocta and Polyzoa ( Bryozoa) became effectively synonymous.
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Polyzoa > [noun]
Polyzoa1830
Bryozoa1837
Ectoprocta1878
1878 Amer. Naturalist 12 618 Barrois thinks..it is much more natural to consider the Ectoprocta as organisms throughout comparable to Entoprocta, but in which the anus curves within the tentacular crown.
1940 G. S. Carter Gen. Zool. Invertebr. xxiii. 476 To this group belong the annelids, molluscs, Polyzoa (both Ectoprocta and Endoprocta), Podaxonia (Sipunculoidea and probably Phoronidea) and a few other phyla.
1975 Nature 7 Aug. 521/1 As those samples included some typical ‘suspension-feeders’ (Porifera, Ectoprocta, Sabellida and so on), a water current able to transport the food items evidently exists.
1998 L. Margulis & K. V. Schwartz Five Kingdoms (ed. 3) iii. 304/2 The phylogenetic relationships of the three lophophore-bearing phyla—Phoronida, Brachiopoda, and Ectoprocta—to one another is uncertain.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022).
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n.1878
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