Leptostraca

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Leptostraca
Temporal range: Cambrian–Recent
Nebalia bipes.jpg
Nebalia bipes
Scientific classification e
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Malacostraca
Subclass: Phyllocarida
Order: Leptostraca
Claus, 1880 [1]
Families [2]

Leptostraca (from the Greek words for thin and shell)[3] is an order of small, marine crustaceans. Its members, including the well-studied Nebalia, occur throughout the world's oceans and are usually considered to be filter-feeders.[4] It is the only extant order in the subclass Phyllocarida. They are believed to represent the most primitive members of their class, the Malacostraca, and first appear in the fossil record during the Cambrian period.[5]

Description[]

Diagram of Nebalia bipes showing the major features of the external anatomy: 1: antennule; 2: rostrum; 3: carapace; 4: abdomen / pleon; 5: furca; 6: telson; 7: pleopods; 8: antenna; 9: thoracopods; 10: eye

Leptostracans are usually small, typically 5 to 15 millimetres (0.2 to 0.6 in) long,[6] crustaceans distinguished from all other members of their class in having seven abdominal segments, instead of six. Their head has stalked compound eyes, two pairs of antennae (one biramous, one uniramous), and a pair of mandibles but no maxillipeds.[4] The carapace is large and comprises two valves which cover the head and the thorax, including most of the thoracic appendages, and serves as a brood pouch for the developing embryos. The first six abdominal segments bear pleopods, while the seventh bears a pair of caudal furcae, which may be homologous to uropods of other crustaceans.[7]

Leptostracans have gills on their thoracic limbs, but also breathe through a respiratory membrane on the inside of the carapace. The eggs hatch as a postlarval, or "manca" stage, which lacks a fully developed carapace, but otherwise resembles the adult.[5]

Classification[]

It is now accepted that leptostracans belong to the Malacostraca,[8] and the sister crown group to Leptostraca is Eumalacostraca.[9]

The Order Leptostraca is divided into three families, with ten genera containing a total of around 40 validly described extant species:[10]

Species Authority Date Family Distribution
Nebaliopsis typica Sars 1887 Nebaliopsididae Southern Hemisphere [2]
Petryachov 1996 Nebaliopsididae North Atlantic [11]
Dahl 1990 Nebaliidae Antarctica [2]
Nebalia bipes Fabricius 1780 Nebaliidae Arctic and sub-Arctic [2]
Dahl 1985 Nebaliidae north-east Atlantic Ocean [2]
Olesen 1999 Nebaliidae Tanzania [2]
Dahl 1990 Nebaliidae South Georgia [2]
Barnard 1914 Nebaliidae South Africa [2]
Dahl 1985 Nebaliidae Italy [2]
Kazmi & Tirmizi 1989 Nebaliidae Pakistan [2]
Vetter 1996 Nebaliidae California [2]
Dahl 1990 Nebaliidae Falkland Islands
Milne-Edwards 1828 Nebaliidae north-east Atlantic Ocean [12]
Haney & Martin 2000 Nebaliidae California [2]
Nebalia herbstii Leach 1814 Nebaliidae north-east Atlantic Ocean [2]
Martin et al. 1996 Nebaliidae California [2]
Kensley 1976 Nebaliidae south-western Africa [2]
Haney & Martin 2005 Nebaliidae California [13]
Kocak, Moreira & Katagan 2007 Nebaliidae Mediterranean Sea [14]
Song, Moreira & Min 2012 Nebaliidae South Korea [15]
Escobar & Villalobos-Hiriart 1995 Nebaliidae Mexico [2]
Thomson 1879 Nebaliidae South Pacific, South Africa, Caribbean Sea [2]
Wägele 1983 Nebaliidae Red Sea [2]
Dahl 1990 Nebaliidae  [2]
Haney, Hessler & Martin 2001 Nebaliidae western Atlantic Ocean [16]
Risso 1826 Nebaliidae north-east Atlantic Ocean, Mediterranean Sea [2]
Moreira, Cacabelos & Dominguez 2003 Nebaliidae Spain [17]
Thiele 1904 Nebaliidae Kerguelen, New Zealand [2]
Kikuchi & Gamô 1992 Nebaliidae Antarctica [2]
Clark 1932 Nebaliidae Cabot Strait, New Jersey [2]
Walker-Smith 1998 Nebaliidae Australia [2]
Thiele 1905 Nebaliidae Antarctica [2]
Dahlella caldariensis Hessler 1984 Nebaliidae East Pacific Rise [2]
Moreira, Gestoso & Troncoso 2003 Nebaliidae north-east Atlantic Ocean [18]
(Sars) 1870 Nebaliidae North Atlantic, Australia [2]
Moreira, Gestoso & Troncoso 2003 Nebaliidae north-east Atlantic Ocean [18]
Bowman, Yager & Iliffe 1985 Nebaliidae Turks and Caicos Islands [2]
(Wakabara) 1976 Paranebaliidae New Zealand [2]
Walker-Smith 2000 Paranebaliidae Australia [2]
Modlin 1991 Paranebaliidae Belize [2]
(Willemöes-Suhm) 1875 Paranebaliidae Atlantic, Pacific and Indian Oceans [2]
Haney & Martin 2004 Paranebaliidae British Virgin Islands [19]

References[]

  1. ^ "Leptostraca". Integrated Taxonomic Information System. Retrieved October 28, 2010.
  2. ^ Jump up to: a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af Genefor K. Walker-Smith; Gary C. B. Poore (2001). "A phylogeny of the Leptostraca (Crustacea) with keys to families and genera" (PDF). Memoirs of Museum Victoria. 58 (2): 383–410. doi:10.24199/j.mmv.2001.58.21.
  3. ^ "Leptostraca". . March 1, 1998.
  4. ^ Jump up to: a b J. K. Lowry (October 2, 1999). "Leptostraca". Crustacea, the Higher Taxa: Description, Identification, and Information Retrieval. Australian Museum. Archived from the original on September 23, 2017. Retrieved August 8, 2007.
  5. ^ Jump up to: a b Robert D. Barnes (1982). Invertebrate Zoology. Philadelphia, PA: . pp. 708–709. ISBN 978-0-03-056747-6.
  6. ^ Estela C. Lopretto (July 30, 2003). "Phyllocarida". Answers.com.
  7. ^ F. Knopf; S. Koenemann; F. R. Schram & C. Wolff (2006). "The urosome of the Pan- and Peracarida" (PDF). Contributions to Zoology. 75 (1/2): 1–21. doi:10.1163/18759866-0750102001.
  8. ^ J. W. Martin; G. E. Davis (2001). An Updated Classification of the Recent Crustacea (PDF). Natural History Museum of Los Angeles County. pp. 132 pp.
  9. ^ "Malacostraca". Tree of Life Web Project. January 1, 2002.
  10. ^ Todd Haney (2004). "Classification". Natural History Museum of Los Angeles County. Retrieved August 8, 2007.
  11. ^ V. V. Petryashov (1996). "Pseudonebaliopsis atlantica gen. n., sp. n., is a new genus and a new species of Leptostraca (Crustacea, Malacostraca) from the central part of the North Atlantic". Zoologichesky Zhurnal (in Russian). 75 (12): 1892–1896.
  12. ^ Todd Haney. "Synonymy". Los Angeles PEET Project on Leptostraca. Natural History Museum of Los Angeles County. Archived from the original on September 6, 2008. Retrieved February 28, 2009.
  13. ^ Todd A. Haney & Joel W. Martin (2005). Boyko, Christopher B. (ed.). "Nebalia kensleyi, a new species of leptostracan (Crustacea: Phyllocarida) from Tomales Bay, California" (PDF). Proceedings of the Biological Society of Washington. 118 (l): 3–20. doi:10.2988/0006-324X(2005)118[3:NKANSO]2.0.CO;2.
  14. ^ Juan Moreira; Cengiz Kocak; Tuncer Katagan (2007). "Nebalia kocatasi sp. nov., a new species of leptostracan (Crustacea: Phyllocarida) from Izmir Bay (Aegean Sea, eastern Mediterranean)". Journal of the Marine Biological Association of the United Kingdom. 87 (5): 1247–1254. doi:10.1017/S0025315407057487.
  15. ^ Ji-Hun Song; Juan Moreira; Gi-Sik Min (2012). "A New Species of Leptostraca, Nebalia koreana (Malacostraca: Phyllocarida), from South Korea". Journal of Crustacean Biology. 32 (4): 641–653. doi:10.1163/193724012X638482.
  16. ^ Todd A. Haney; Robert R. Hessler; Joel W. Martin (2001). "Nebalia schizophthalma, a new species of Leptostracan (Malacostraca) from deep waters off the east coast of the United States" (PDF). Journal of Crustacean Biology. 21 (1): 192–201. doi:10.1651/0278-0372(2001)021[0192:NSANSO]2.0.CO;2.
  17. ^ Juan Moreira; Eva Cacabelos; Marta Domínguez (2003). "Nebalia troncosoi sp. nov., a new species of leptostracan (Crustacea: Phyllocarida: Leptostraca) from Galicia, Iberian Peninsula (north-east Atlantic)". Journal of the Marine Biological Association of the United Kingdom. 83 (2): 341–350. doi:10.1017/S0025315403007173h. S2CID 86253676.
  18. ^ Jump up to: a b J. Moreira; L. Gestoso; J. S. Troncoso (2003). "Two new species of Sarsinebalia (Crustacea, Leptostraca) from the Northeast Atlantic, with comments on the genus". Sarsia: North Atlantic Marine Science. 88 (3): 189–209. doi:10.1080/00364820310001390. S2CID 84442419.
  19. ^ Todd Haney; Joel W. Martin (2004). "A new genus and species of leptostracan (Crustacea: Malacostraca: Phyllocarida) from Guana Island, British Virgin Islands, and a review of leptostracan genera" (PDF). Journal of Natural History. 38 (4): 447–469. doi:10.1080/0022293021000033210. S2CID 51695603.

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