無螯下目

無螯下目
化石时期：晚侏羅世 – 現在
葉形幼體是無螯下目的典型特徵
科学分类 编辑
界： 动物界 Animalia
门： 节肢动物门 Arthropoda
亚门： 甲殼亞門 Crustacea
纲： 软甲纲 Malacostraca
目： 十足目 Decapoda
亚目： 腹胚亚目 Pleocyemata
下目： 無螯下目 Achelata
Scholtz & Richter, 1995
科[1]

见正文

無螯下目（Achelata），也称无螯虾下目，是十足目抱卵亚目下的一個下目。

描述

無螯下目得名於其下的蝦沒有螯這一事實，“Achelata”來自希臘語，其中α-即a-為“沒有”之意，χηλή即chela為“螯”之意。它們擁有擴大的觸鬚，幼體則為特殊的葉形幼體。[2]

分類

無螯下目包含龍蝦科和蟬蝦科這兩個現存科，[3] 另外還有坎蝦科和三脊蝦科這兩個已滅絕科。[1]

無螯下目下的現存物種
龍蝦科的棘刺龍蝦
蟬蝦科的Scyllarides latus

兩個現存科的化石記錄都可以追溯到白堊紀。[4][5] 另外兩個化石科都只有一個屬，[6] 其中坎蝦科生活於侏羅紀至白堊紀之間。[5] 也有人認為無螯下目的化石記錄可以追溯到3億4100萬年前。[7]

參考資料

  1. ^ 1.0 1.1 Sammy De Grave, N. Dean Pentcheff, Shane T. Ahyong; et al. A classification of living and fossil genera of decapod crustaceans (PDF). Raffles Bulletin of Zoology. 2009,. Suppl. 21: 1–109 [2013-04-23]. （原始内容存档 (PDF)于2011-06-06）. 
  2. ^ Gerhard Scholtz & Stefan Richter. Phylogenetic systematics of the reptantian Decapoda (Crustacea, Malacostraca) (PDF). Zoological Journal of the Linnean Society. 1995, 113 (3): 289–328 [2013-04-23]. doi:10.1006/zjls.1995.0011. （原始内容存档 (PDF)于2020-10-25）. 
  3. ^ Ferran Palero, Keith A. Crandall, Pere Abelló, Enrique Macpherson & Marta Pascual. Phylogenetic relationships between spiny, slipper and coral lobsters (Crustacea, Decapoda, Achelata). Molecular Phylogenetics and Evolution. 2009, 50 (1): 152–162. PMID 18957325. doi:10.1016/j.ympev.2008.10.003. 
  4. ^ Francisco J. Vega, Pedro García-Barrera, María del Carmen Perrilliat, Marco A. Coutiño & Ricardo Mariño-Pérez. El Espinal, a new plattenkalk facies locality from the Lower Cretaceous Sierra Madre Formation, Chiapas, southeastern Mexico (PDF). Revista Mexicana de Ciencias Geológicas. 2006, 23 (3): 323–333 [2013-04-23]. （原始内容存档 (PDF)于2017-08-13）. 
  5. ^ 5.0 5.1 Joachim T. Haug, Carolin Haug, Dieter Waloszek, Andreas Maas, Matthias Wulf & Günter Schweigert. Development in Mesozoic scyllarids and implications for the evolution of Achelata (Reptantia, Decapoda, Crustacea) (PDF). Palaeodiversity. 2009, 2: 97–110 [2013-04-23]. （原始内容存档 (PDF)于2021-03-09）. 
  6. ^ Rodney M. Feldmann, Ali Kolahdouz, Bijan Biranvand & Guenter Schweigert. A new family, genus, and species of lobster (Decapoda: Achelata) from the Gadvan Formation (Early Cretaceous) of Iran (PDF). Journal of Paleontology. 2007, 81 (2): 405–407 [2013-04-23]. doi:10.1666/0022-3360(2007)81[405:ANFGAS]2.0.CO;2. （原始内容 (PDF)存档于2016-03-04）. 
  7. ^ Keith A. Crandall, Megan L. Porter & Marcos Pérez-Losada. Crabs, shrimps and lobsters (Decapoda). S. Blair Hedges & Sudhir Kumar (编). The Timetree of Life. Oxford University Press. 2009: 293–297. ISBN 978-0-19-160898-8. 

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