顎足綱

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顎足綱
Maxillopoda
化石時期: 511–0Ma
寒武紀中期-現代
Cyclops (Copepoda: Cyclopoida)
科學分類
界: 動物界 Animalia
門: 節肢動物門 Arthropoda
亞門: 甲殼亞門 Crustacea
綱: 顎足綱 Maxillopoda
Dahl, 1956 [1]
亞綱

顎足綱學名Maxillopoda)是甲殼動物的一個多樣化類別,包括藤壺橈足類和一些相關的動物。它不是一個單系群,也沒有一個任何一個全體共通的特徵[2]

概述[编辑]

除了一些藤壺屬的物種以外,顎足綱多半為小型個體[3],已知最小的節肢動物門動物Stygotantulus stocki(中文譯名未知)即屬顎足綱[2]。身形多短,包括身長不到0.1毫米或0.004英吋者,腹部小,普遍缺乏附肢[3]。這很有可能是由於幼体性熟pedomorphosis)引起[3]

異於用腳濾食的藤壺,大部分顎足綱動物以其口器濾食,具有5頭節,6胸節和4腹節,以及1尾節[4]

化石紀錄[编辑]

本綱物種的化石紀錄最遠可追遡到寒武紀[5]。在那時期生活的物種,化石有藤壺屬[6]舌形動物類[7]兩種。

分類[编辑]

一般分類都把本綱物種再細分為六個亞綱,但也有其他研究分得更為仔細,例如包括有ostracod[2]。Of the six groups, only Mystacocarida are entirely free-living; all the members of the Tantulocarida, Pentastomida and Branchiura are parasitic, and many of the Copepoda and Thecostraca are parasites.

Subclass Members Photo
橈足亞綱 Copepoda Calanoida
Cyclopoida
Gelyelloida
Harpacticoida
Misophrioida
Monstrilloida
Mormonilloida
Platycopioida
Poecilostomatoida
Siphonostomatoida
Haeckel Copepoda Calocalanus pavo.jpg
Calocalanus pavo
(Calanoida: Calocalanidae)
鞘甲亚纲 Thecostraca Cirripedia (barnacles)
Facetotecta
Ascothoracida
Chthamalus stellatus.jpg
Chthamalus stellatus
(Sessilia: Chthamalidae)
鰓尾亞綱 Branchiura Arguloida (fish lice)
Cyclida
Argulus.jpg
Argulus on a stickleback
(Argulidae)
舌形亞綱 Pentastomida Cephalobaenida
Porocephalida
Raillietiellida
Reighardiida
Armillifer armillatus.jpg
Armillifer armillatus
(Porocephalidae)
须虾亚纲 Mystacocarida Ctenocheilocaris
Derocheilocaris

Ctenocheilocaris
(Derocheilocarididae)
微虾亚纲 Tantulocarida Basipodellidae
Deoterthridae
Doryphallophoridae
Microdajidae

參考資料[编辑]

譯自英文版條目

  1. ^ Maxillopoda. Integrated Taxonomic Information System. [October 7, 2010] (英文). 
  2. ^ 2.0 2.1 2.2 Joel W. Martin & George E. Davis. An Updated Classification of the Recent Crustacea (PDF). Natural History Museum of Los Angeles County. 2001: 132 (英文). 
  3. ^ 3.0 3.1 3.2 Introduction to Maxillopoda. University of California, Berkeley. [December 31, 2009]. 
  4. ^ Phil Myers. Maxillopoda. Animal Diversity Web. 2001 [December 31, 2009]. 
  5. ^ D. E. G. Briggs. Affinities and early evolution of the Crustacea: the evidence of the Cambrian fossils. (编) F. R. Schram. Crustacean Phylogeny. Rotterdam: Balkema. 1983: 1–22. ISBN 9061912318. 
  6. ^ B. A. Foster & J. S. Buckeridge. Barnacle palaeontology. (编) A. J. Southward. Crustacean Issues 5: Barnacle Biology. 1987: 41–63. ISBN 90-6191-628-3. 
  7. ^ Dieter Waloszek, John E. Repetski & Andreas Maas. A new Late Cambrian pentastomid and a review of the relationships of this parasitic group. Transactions of the Royal Society of Edinburgh: Earth Sciences. 2005, 96: 163–176. doi:10.1017/S0263593300001280. 

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